Search for water collection in Topics

Rain Water Collection Filtration System?

We are in the middle of  designing a  rain water   collection system for a  commercial  building   that    includes: 1.  a  2500  gallon  in  ground  tank 2. 1/2 hp  submersable  well pump 3.simple  float  valve to maintain  minimum   water level  during  drought What we  are     trying  to figure   out   is  to exclude   purchasing a  complicated  expensive   store bought  filtration   system we were   trying  as we always  do to  keep things  simple.   we have to   provide  sometype of  secondary filtration  system    to  aereate  the  water as well as  clean  it   in order to  run  to  our  toilets.  Whatwould  be wrong with using a   small  pool filter  set   in a  1 hour  a day   cycle  that  would   provide  oxygen  to  the water ? Also we were looking  at   using  one of  the floating   chlorine  tablet  holders  like  a   pool would  use  to   maybe   kill  any pathegons    that would  be in  it. We  realize this is  too simple  to    not have  some   down side  so  all    opinions  and help would be greatly appreciatted.

Question by andy1917    |  last reply

Water deionizer

Hi I was wondering if any one had a good idea of how to build a water deionizer.I'm just starting a car valeting business and need deionized water for final rinsing of cars to prevent water spots as we are in an ultra hard water area and normal rinsing leaves water spots no matter how well we chamois it. I have a 1000L IBC tank that we use to collect recycled and rain water which i want to use to rinse off the cars. As we are in a water controlled zone we have to recycle and filter our water and also it is a ultra hard water area the filters to deionize the water for rinsing cost around £90 plus postage and only last 10-15 cars which is to really killing our business. It is costing us around £9 a car to just rinse them and on a basic wash we only charge £10 which as you can see is not viable. Thanks in advance

Topic by msc    |  last reply

why is water displacement method used in collecting oxygen?

Why is that water displacement is being used in collecting oxygen and hydrogen gases/

Question by jambea    |  last reply

Water Bottle Raft

Finished Project - thinking about Reishee and his island, I asked my mom if I could build an island from water bottles...the idea was rejected. I asked my mom if I could build a raft, and she said i've started collecting water bottles. Not only does the final result get me excited, but people's responses do as well. Of course there are those who think i'm crazy (as there are with any of my schemes), but there are so many more who just love the idea, and get enthralled in it. A friend in crew is going to empty the boat house recycling bin for me, a teacher told me that the recycling bin in the teacher work room is over flowing, many more offer to collect water bottles from their families, and bring in the 20+ bottles from their cars. I bring a bag to school to collect them, and collect bottles from people...just being a part of this great recycling project (I want it to be 98% recycled) excites people, so when they see one person donate a bottle, others will hurry to finish their water and donate it to the cause as well.The whole thing has just opened my eyes to how many bottles are thrown out, instead of being's amazing. Just because people will probably be asking, this is my plan:Two large water bottle pontoons will be on either sideA wooden frame/deck will be clipped onto the pontoons via eye bolts and carabinersHomemade oarsThat's the basics...I hope to have some luxuries too:Big ole water tight cooler bolted onto the back for storageTwo stadium seats bolted onto the deck to sit onTo keep up with the raft, visit

Topic by Weissensteinburg    |  last reply

wet scrubber

I am setting up a factory for making vacuum-formed acrylic shower bases reinforced with fiberglass. I will be dealing with resin fumes, microscopic glass fibers (from cutting and handling the fiberglass batts) and larger dust particles of acrylic, fiberglass and cured resin from cutting off the bottoms of these units. I am in China, and the factoryies I have seen merely have fans and blow the stuff outside, with some directing the dusty air over a bit of water that supposedly collects the dust. Being from Canada I cannot accept such a poor solution, but my newly hired employee seems to think that the concept is best. I will be looking into cyclone systems, of which a few posts are made on this site, but can anyone post a fairly simple instructable on how to make a water based system for collecting the dust?

Topic by WHET    |  last reply

Automated plastic waste collection device

Does anyone have an idea about collecting plastic waste from lakes and rivers?If you do share your ideas it should be a machine which is automated to collect plastic waste from water.

Topic by ZaynH    |  last reply

If I want to collect rain water inside a light funnel (glass), how would the drainage system work?

 The existing flooring consists of  concrete slabs 230mm thick sitting on top of concrete beams 450mm thick, and the diameter on the bottom of the funnel is about 4 meters. Thank you for your help :)

Question by matisha23    |  last reply

Peltier Air Water Harvester

I was looking around at some of the air water harvesters tonight and of thinking about using a Peltier unit for one. Just started thinking and I know very little about either one of these. So my question is, could you use the cold side of a peltier to get an air current down to just below dew point causing humidity to condense on maybe a heat sink or something so it could be collected and use the hot side to create the air flow by a chimney effect? No moving parts.  Solar power it so it an be used anywhere in the world? Could be something that could supply clean water to people in need.

Question by dayfid12    |  last reply

PVC vs Hydroponics and Rain water collection - a timely warning

Hello one and all- I've been interested in hydroponics for a very long time.  Now the time has come around that I should get out and get some form of it built and begin using it.  I began researching different styles and of course reading here on Instructables. I read about all the different styles and methods.  I looked at kits, partial kits, and building my own design.  I also began to think about moving away from the use of the well on my property.  I looked into rain water capture.  Here in the north east there's been no shortage of rain even in a "dry" year. In nearly every tutorial or kit I've found them based on a PVC product or using PVC materials.  I remembered that there had been an issue with Lead (Pb) being in PVC. I looked it up.  It appears that there are serious issues with the use of PVC and Lead is only one of them. Here is a sampling of the links to the issue of Lead in PVC - This is just a few links - there are a ton more. It's an interesting read and should give everyone working with PVC cause for pause.   For example instead of using the PVC gutters I had planned on for the rainwater collection I've been thinking about making them from wood (Plywood) and coating the inside with Food Grade Shellac.  I will be using PVC pots for container vegetable gardening this year but I will rough up the interior of the container (taking precautions - respirator, gloves etc) and again using Food Grade Shellac to prevent the PVC coming into contact with the growth media or growing vegetables. I was sort of surprised by this info and just thought I should share it just in case someone was unaware of the issue.  I would like to cross post this but am not likely to do so for concern of running afoul of some rule.  Feel free to share this info though.  In fact please share this widely- Good luck with your projects, Marcintosh

Topic by marcintosh    |  last reply


If the earth is made of by a lot of dust collecting in space due to gravity how did water form on earth?

Question by mayney93    |  last reply

How can I collect and melt large amounts snow for drinking water? (solar, not fuel based)?

I live in the woods in central Massachusetts.  I collect rainwater during the warmer months, filtering it for drinking water.  I'm looking for a fairly convenient, low effort way to melt snow using the sun.

Question by hunrichs    |  last reply

Rainbarrels- New or Reconditioned? Answered

Greetings! I want to install rain barrels beneath four downspouts. I would also like to be able to use the water for consumption if the need should arise, so I wonder if the "reconditioned" 55 gallon barrels can be cleaned enough for such use, or should I just purchase brand new ones? I can save a lot of money on the reconditioned ones, but if they are going to contaminate the water, I will gladly pay the price for new. Any advice is most appreciated!  -Bradley

Question by RedMayor    |  last reply

Groasis helps trees grow anywhere

Want to plant trees anywhere, even the desert? Then the Graosis Waterboxx might be the solution. It's a container that sits around the base of a young tree. It collects both rainwater and condensation in a reservoir and the water is then wicked down to the roots. Once the tree's roots grow down deep enough to sustain itself, the box can be removed. It seems to be pretty effective, too. While testing in the Sahara desert, 90% of trees that used the Growboxx survived compared to only 10% of the other trees that were planted and watered daily. The next step is to test at 25 locations in 8 different countries.

Topic by fungus amungus  

Group : Collection of Instructables for class-room and teaching purposes ...

Hi !I created a group that seems not to have been ever created here yet."Class-Room" group.The main purpose of this group is to make a collection of every instructables that may be useful for school teaching, and that may be reproduced by pupils or students as science-fair or class-room projects ...Please, add your Instructables if they fit this description._Biology :"Be a Scientist : map your skin"Chemistry :"Carbonating""Kitchen laboratory II : The CO2 trap""Make crystal clear ice !""Make Rheopectic slime in less than 15 minutes !""Shelling a raw egg !""Sodium Acetate"Investigations :"Amazing Kite For Under $5""How to make Playdough (Play-doh)""Oobleck""Pop-Up 3D words and messages !""The Huffin' Hoopster""The Improved CD Hovercraft."Physics : Electricity & Electrostatics :"Build an Electrostatics Motor""Jacob's Ladder Sculpture from found materials""Kelvin's Thunderstorm : Create lightning from water""Paper Resistor"Physics : Instruments & Measures :"Be a Scientist : Make your own force-meter.""Be a Scientist : Make your own thermometer"Physics : Magnetism :"A simple mechanical resonance demonstrator""Diamagnetic Levitation Experiment"Physics : Optics :"Naff Movie into _DVD-Spectra_""Optical Water-Prism"Physics : Sound :"How to measure the speed of sound ...""Mechanica Wave Driver for Chladni Plate"

Topic by chooseausername    |  last reply

Please suggest components for a water spray/vacuum system for cooling and dust collection while grinding. Answered

The grinding is being done in a tight area. A long handled grinding disc (please see picture) is being used. Only the grinding disk rotates, not the long handle.  It would be best if the water lines and vacuum lines could be attached along the handle, welded? cable ties?  The system needs to be portable but electricity will be available. The smaller the components, such as water reservoir, peristaltic pump, vacuum pump, vacuum holding tank, spray nozzle, tubing, the better. The material to be ground is heat sensitive so the water spray is needed for cooling.The water pump needs to be a peristaltic type pump so that the fluid is only in contact with the tubing.  I will also need a way to connect the flexible tubing of the pump to a more rigid, perhaps metal fluid line along the handle..  Due to the small grinding surface, water flow does not need to be great, perhaps 20 ml per minute.  The dust produced from grinding can obscure the view so a vacuum source is necessary.  I welcome any suggestions on:  how the system could be designed, what components I would need,  where components could be purchased,  how to keep costs down, etc.  I greatly appreciate any guidance you can give me.

Question by jadeway    |  last reply

How much water is in my cistern?

I built a 33 gallon cistern my garage to collect condensate from my HVAC system. (I didn't have room outside my condo for a rain barrel). It has a spigot and a short hose, it lives above my utility sink, which is where the overflow goes when the cistern is full. I'm hoping some clever makers can give me some ideas on how I can build something that will tell me how much water is in the cistern. I have Samsung SmartThings so I've considered putting a water sensor just below the overflow hole, so I will know when it's at 100%, but I would prefer to have a percentage reading and an alarm when it gets to 90% or so. I considered an arduino with an ultrasonic sensor but that a bit involved... Not opposed to it but please be prepared to hold my hand thru the process of you propose it! ☺. Non-SmartThings solutions also welcome.Thank you - looking forward to your genius ideas!!Mark

Topic by MarkB673    |  last reply

I want to construct a water well from cardboard, approx. 2 1/2 to 3 feet tall.

This will be used as a collection receptacle in our children's church project as "well" as in the bible story of Joseph.

Question    |  last reply

Partial solution to trash in water? Maybe.

 Hey everyone, I had a couple of ideas for getting trash out of our storm drains/oceans/streams/rivers, the first one, this one has a couple of flaws: This is a very basic idea to skimming trash off the surface of water, a net. Preferably one with small holes to limit the amount of trash flowing out of it with the water. BUT, fatal flaw: It can also catch wildlife in it, and I'm still trying to figure out how to work around this. Any suggestions? Second, a filter of sorts for storm drains/streams: Imagine a metal mesh wedge, kind of like a snowplow wedge, that would go in front of drains and such (I'm thinking more for the type of streams and drains that have those big tunnels going under roads and sidewalks and emerge on the other side). The wedge could allow water to flow through, but direct trash off to the sides to collection tanks. I'll try to illustrate it below.                       - - - - - - - - <0 (the lines would be the stream, then the wedge, then the drain/tunnel opening. I couldn't do the tanks...) I'm eager for any suggestions/tips, improvements, and thoughts on these!

Topic by Zem    |  last reply

Can someone tell me a good way to collect hydrogen?

A few days ago i started separating Hydrogen and Oxygen from water (with electricity of course) and saw that Hydrogen was very combustible.Can anyone tell me a good way to catch it (i tried a few ways but it either blows up or doesn't have enough pressure to go out of the tube and sometimes both) or just a way to collect it and have pressure?

Question by Falcore    |  last reply

Procuring a Rain Barrel?

I am looking to start my DIY water collection system, but the key for me is to find 3-4 55 gallon plastic drums for this project. I located someone on craigslist selling several drums for a very reasonable price. The question I have is, should I be very concerned that these plastic drums once contained various car washing fluids? Can these be effectively rinsed out? Will my garden be severely impacted by this?

Question by mcain    |  last reply

Question About Making Sparkling Wine/Champagne?? Answered

I have some finished wine that I want to make into sparkling wine. I understand that you may add a certain sugar solution to it and it will carbonate. There is a problem with this because there will be a residue at the bottom of the bottle. I was wondering if a method I thought of would also work. Here is how it goes. 1) Boil off and collect the alcohol from the wine, with a still. 2) Boil off and collect the water from the wine, with a still. 3) Replace the water you collected from the wine with tonic water that you are putting in the wine. 4) Re-add the alcohol If I am correct I should have carbonated wine, aka sparkling wine. If anyone has any idea if this will or won't work and why, please answer. Thank you for your time.

Question by muffin1    |  last reply

What is the fastest most energy efficient way to evaporate seawater on a small scale and collect the salt that reminds?

I tried standard sun evaporation in trays (1 gallon) and it takes far too long (not to mention all the debris that collects in the water during the evaporation process). Heating it over the stove uses too much energy. I am thinking a solar fan / heat combination. Your thoughts? (Note: The goal is to collect the sea salt.)

Question by ericrowe    |  last reply

Solar Power Well Pump Idea Thing

Hello, I've been thinking lately about moving out to the desert lately and living off the grid with a well, but I'm not sure my base idea for pulling up water from a well will actually work. My idea is to have a line running up from the well (ending in a one way valve) to the bottom of essentially a steel water trough with a glass lip on top making it airtight. A pvc would run from a hole in the top to a water storage tank to move water vapors up there and condense them. My hoped mechanism of action would be as the air heats up in the trough due to the sunlight it would force the water up from the well little by little and evaporate it. My question is, will this actually pull up water from the well or would I have to buy a solar pump?  I don't need lots of water fast or high pressure, the water storage will gravity feeds and collect throughout each day. My other idea which I'm pretty sure will work is having the showers, sinks, and washer (using a compost toilet) feed a one way line out to the hotbox too. If as little as 50% of the water makes it back into the lines that way then I will have cut my water usage in half. What does everybody think?

Question by Johanna_W    |  last reply

Am I using this guitar humidifier correctly? Answered

I recently acquired this Planet Waves Acoustic Guitar Humidifier, and on the package it says no leaks because the holes are on the side. I can only store my guitar (in its case) on its side, so one side is facing downwards. I am putting in the minimum recommended water amount, but i am still worried it will leak. Will it leak? Will I have to store the case laying flat? I really don't want my new acoustic to crack or warp, but i also don't want it to collect water, as this will mess up the wood. Please help!!!

Question by freeza36    |  last reply

Advice on A centrifugal pump.

Hello, I recently was given a pet from a friend and after doing some research on what the little guy needs I came to the understanding that the current enclosure he is in is inadequate for his needs. Therefore, I wanted to save up some cash to get him the right size tank set up that I know he deserves. In the meantime though, I have plenty of things laying around the house that I feel could render him a more comfortable habitat till that investment goes through. After more research on the matter, I came to find that for most household aquariums, the bulk of the work falls on your filtration system. That being said, I wanted to go for a Wet / Dry Sump Filter setup as it would be  the most easiest system to setup at home with the various resources laying about. Unfortunately while gravity will be doing the work of siphoning the water from the tank down to the Wet / Dry Filter Media, it will not be moving it back up to the tank. For that I concluded there was no escaping the need of a pump in some shape or form to move that cleaner water back into the tank. From what I read the pump will pretty much determine how big I can make his tank.  So this brings me to my current dilemma. Presented with various motors around the house, I went for the biggest I could find (* excluding the water pumps in our cars mind you). That so happen to be a 1.25 HP Wet & Dry Shop vac that was collecting dust in the garage. I confirmed the motor is working and already came with the impeller attached to it. I was hoping to see if you fine folks could share some wisdom on how I can: 1.) Make it Waterproof. 2.) Adhere the right type of casing around the Impeller and Motor so as to benefit from the  Bernoulli's principle and get the most water moving through my system.  3.) I intend to have this setup not 15~20 feet from where I sleep, this motor is LOUD. I was reading online about creating a sound damping box for it and was wondering what suggestions you guys might have for that? I keep fearing there won't be enough ventilation and it will over heat. ....anything else you would like to throw in. TL;DR : 

Topic by Rensouken    |  last reply

Want collaborators for a solar hot water project

I have had this idea for a while and I decided to try and make it a collaboration instead of just trying to do it by myself. I thought there was a way to start a collaborative instructable, but I don't see that option now. Does anyone out there know how to do a collaborative instructable? Maybe that option appears right before you publish it? I don't know if the best way to share ideas is this forum, or the collaborative instructable (if it exists). ******** Here is the idea: I have a solar box cooker, which is shown in this instructable. On days when I have nothing to cook, I often put a kettle of water in it, so when I get home from work I have very hot water that can be used for cooking pasta, making  tea, coffee etc. I pour that water into a thermos, and it will stay hot until the next day. I would like to design and build a solar cooker that is dedicated to this task with this tentative list of requirements: *It would be fairly small, just large enough to hold a kettle *It would be easy to put the kettle in and take it out *It would be weatherproof, so it could sit outside for months at a time *It would be designed in such a way that it would collect energy from the Sun during a large portion of the day, without need of any sun-tracking mechanism *Ideally, it would have a mechanism that would transfer the water to a thermos as soon as it boiled, or got to a certain temperature. Looking forward to hearing from people who want to collaborate on this. As soon as we have decided on where to share ideas, I'll post mine.

Topic by dlginstructables    |  last reply

Roof Top Siphon

I have a flat roof that collects about an inch and a half or more of water after a good rain. I want to get it off with a battery powered siphon that would drain it into the gutter. Any ideas?

Topic by drphoto1    |  last reply

Official Rules: Summer Water Challenge

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For entrants subject to tax obligations under the People's Republic of China, the winner shall be responsible for reporting his or her individual income tax generated from the prize to relevant Chinese tax authorities on his or her own and shall then submit the Sponsor a tax payment proof showing the tax is fully paid. If the winner fails to submit the afore-mentioned proof within a reasonable period of time as required by the Sponsor, the Sponsor reserves the right to disqualify the winner from entitlement to the prize. All prizes that are items or services which are subject to third party terms and conditions or restrictions, acceptance and use of the prizes are subject to all eligibility criteria, expiration dates, service or dormancy fees, and all other terms and conditions (if any) imposed by the issuer of such items or services, which are available on the Contest Page for the Contest. Please be aware that Contest prizes may not be usable or function properly in certain countries and Sponsor has no knowledge relating to the use or functionality of such prizes in those countries. Use or operation of prizes in certain countries may require additional parts, components or adapters, and Sponsor has no knowledge of any such requirements or any responsibility for obtaining any such parts, components or adapters.  In addition, certain countries may prohibit the use or operation of the prizes, in whole or in part, and Sponsor has no knowledge regarding, and shall have no responsibility for determining, whether the winner(s) are permitted to operate or use the prizes in any particular country.   The estimated retail value of each prize to be awarded in the Contest is as follows: Tier [1] one top prize: Waboba Pro Ball, a 1-Year Pro Membership and T-Shirt ; Total retail value: $ 63. (convert currency) Tier [2, 3, 4, and 5] two, three, four, and five runner up prize: Instructables robot t-shirt, 1-Year Pro Membership; Total retail value: $53. (convert currency) Tier [2] two top prize: 32 oz Alex Water Bottle, 1-year Instructables Pro membership, and an Instructables robot t-shirt, Total retail value:: $83 USD. (convert currency) Tier [3] three top prize: Waterproof Camera, 1-year Instructables Pro membership, an Instructables robot t-shirt, Total retail value:: $229 USD. (convert currency) Tier [4] four top prize: Nuclear Globe, a 1-year Instructables Pro membership, and an Instructables robot t-shirt, Total retail value: $309. (convert currency) The total estimated retail value of all prizes to be awarded in the Contest will range from $ USD to $ USD, as described above. (convert currency)   Judging. All entries that are in compliance with all terms and conditions of these Rules will be judged on the basis of the following criteria (the "Criteria"): originality, usefulness, simplicity, and clarity of instructions, each of which will be given equal weight. Sponsor will establish a panel of at least two (2) individuals (each, a "Judge"), including at least the following: Editor of Pertinent Category and associate editors. In choosing the winner(s), the Judges will judge each finalist on the Criteria and the Judging Process as described in Section B below. THE DECISIONS OF SPONSOR AND THE JUDGES WILL BE FINAL. SPONSOR WILL NOT CORRESPOND WITH ENTRANTS ABOUT THE DECISIONS OF THE JUDGES OR THE DETERMINATION OF THE WINNERS OTHER THAN AS EXPRESSLY PROVIDED IN THE RULES. Further information on the steps and process of voting and judging can be found in Section B below. Size of Entry Pool. Winning entries will be selected by the Judges in accordance with the Criteria as described in these Rules. The chances of any entry winning a prize depends on the number of eligible entries received between the Start Date and the Deadline and the quality of that entry as compared to the other eligible entries, as evaluated by the Judges in the manner described above. Sponsor does not know in advance the number of eligible entries that will be received. The number of entries received, and the number of winners chosen, in prior Speed Challenge contests of Sponsor, including the three (3) most recently completed Speed Challenges, can be found through the “Contests” page of the Sponsor Site. The number of eligible entries for Sponsor's recently completed Speed Challenge contests generally has ranged from approximately forty (4) to approximately six-hundred fifty (103), and generally has averaged approximately one-hundred fifty (32), but Sponsor cannot predict or guarantee any specific number of eligible entries for the Contest. SECTION B – ADDITIONAL TERMS FOR THIS CONTEST General Conditions. By entering the Contest, each entrant agrees to abide by the terms of these Rules and by the decisions of Sponsor and the Judges, which shall be made in all cases in their sole and absolute discretion and are final and binding on all matters relating to the Contest. These Rules are a legally binding contract, with equivalent effect to a private contract between each entrant and Sponsor. The Contest is void where prohibited by law The Contest is governed by Sponsor's Terms and Conditions of Use and Privacy Policy and other policies (collectively, the "Policies") pertaining to the Sponsor Site, although the Rules will govern any conflict between the Rules and the Sponsor's Terms or the Rules and the Privacy Policy. Exclusions from Eligibility. Employees of Sponsor, any Co-Sponsor, or their respective parents, subsidiaries, affiliates, partners, suppliers, or advertising or promotional agencies (including without limitation any Judges who are employees of Sponsor, any Co-Sponsor or any of their respective parents, subsidiaries, or affiliates), as well as members of their households or their immediate families (i.e., spouses, parents and children), may submit entries in the Contest, but any such entries are for information and entertainment purposes only and are not eligible to be considered for the purpose of selecting finalists or winners. Judges who are not employees of Sponsor, any Co-Sponsor or any of their respective parents, subsidiaries, or affiliates, are not eligible to enter or win, nor are members of their households or their immediate families (i.e., spouses, parents and children). Notwithstanding the foregoing, Sponsor shall have no liability to any entrant or any other person in the event that Sponsor inadvertently awards a prize to any non-eligible person(s). In addition, each entrant acknowledges and accepts that Sponsor may be prohibited by applicable law from permitting entry by or awarding a prize to any person falling into one or more of the following prohibited categories: (a) a national or resident of Cuba, Iran, Iraq, Libya, North Korea, Sudan, Syria or any other country for which trade with the United States has been prohibited or restricted by any statute, regulation, order, rule, treaty, or other law of the United States or any other applicable jurisdiction in any manner that would prevent the awarding or delivery of any prize to the entrant; (b) a person on the U.S. Table of Denial Orders, Entity List, List of Specially Designated Nationals and Blocked Persons, or any other similar list of any applicable jurisdiction, or any person affiliated with any person or entity on any such list; (c) an official or representative of any foreign government; or (d) any other person to whom the awarding or delivery of any prize would violate any applicable statute, regulation, order, rule, treaty, or other law or any of Sponsor's policies. If an entrant falls into any of the above prohibited categories, such entrant is not eligible to win any prizes. Entry. Multiple entries are permitted, but only one entry per entrant can win a prize in the Contest. Entrants must be registered members of the Sponsor Site to enter the Contest. Registering for a Sponsor Site membership account for purposes of entering the Contest is free of charge. Entries can be the work of more than one person, but for purposes of the Contest, each entry will belong to the "Primary Author" named in the entry, regardless of the number of contributors to that entry. For winning entries, Sponsor will award the applicable prize to the named entrant only, except in the case of a minor, to such minor's named parent or legal guardian only unless specific consent from such parent or legal guardian to award the prize to such minor in accordance has been obtained by way of a duly signed Winner's Declaration and Release. (See Section A.7 above), and will not be responsible or liable for apportioning any prize among contributors to a winning entry. Upon submission, all entries become subject to the Policies (including without limitation the provisions regarding ownership and use of user submissions as stated in Sponsor's Terms and Conditions of Use and further described in Section B.15 ("Advertising and Marketing"). Notwithstanding the foregoing, entries to the Contest shall only be valid after the entry is accepted by Sponsor, and its acceptance occurs at Sponsor's location in the United States. Entries will not be acknowledged or returned. Entrants are permitted to modify or update an entry after submission, but are not permitted to do so after the Deadline. Entries may remain posted on the Contest page of the Sponsor Site indefinitely following the Deadline, but Sponsor reserves the right to delete entries from the Contest page after the Contest ends, in its discretion, and Sponsor reserves the right to delete entries from the Contest page and other pages of the Sponsor Site, at any time in its discretion, if such entries infringe or may infringe any third party's rights. Entries may not be created or submitted through any software-generated, robotic, programmed, script, macro, or other automated method. Sponsor and Co-Sponsor will have no responsibility for, and will have the right to refuse in its discretion, any entries that have been tampered with, or entries that are misdirected, incomplete, non-conforming, corrupt, lost, late, or ineligible, whether due to Internet or e-mail server failure or otherwise. Proof of transmission of an entry shall not constitute proof of receipt. It is each entrant's responsibility to keep Sponsor informed of any changes to entrant's contact or other information during the Contest. Use of Personal Information. Registering for an account with the Sponsor Site, which is required to enter the Contest, may require each entrant to submit entrant's name, e-mail address, age or date of birth, and other contact details, and in the case of a minor, contact details for a parent or legal guardian for purposes of obtaining proof of parental consent, if Sponsor elects to do so. For further information concerning how Sponsor handles personal information, as well as provisions on confidentiality and the cases in which Sponsor may be entitled to disclose entrant's information to third parties or upon request of an authority, consult Sponsor's Privacy Policy, which is incorporated herein. Additional Entry Requirements. Each entry must comply in all respects with the Policies, including without limitation all requirements for user submissions, as stated in the Terms and Conditions of Use for the Sponsor Site. Without limiting that requirement, each entry also must comply with the following: Each entry must be entirely the original work of the persons identified in the entry; If persons other than the entrant have contributed to an entry, the entrant must have the written permission from each contributor prior to submitting the entry; Entries must not have been published prior to the Start Date; Entries must not have been entered in more than two other contests of Sponsor; Entries must not contain anything that is or may be: (i) threatening, harassing, degrading or hateful; (ii) defamatory; (iii) fraudulent or tortious; (iv) obscene, indecent or otherwise objectionable; (v) deemed to cause feelings of disharmony, enmity, hatred or hostility between different religious or racial groups; (vi) protected by copyright, trademark, patents, utility models, design patents or other proprietary right without the express prior written consent of the owner of such right; or (vii) dangerous or potentially dangerous, or that would encourage dangerous behavior from viewers, such as use of explosives and/or harmful substances; or (vii) contrary to governmental policies of any country whose residents are eligible to enter the Contest. Entries must provide proper safety instructions, as applicable, such as with respect to the use of knives, cutting devices and other tools; and Entries must not contain any material that would give rise to criminal or civil liability or that encourages conduct that constitutes a criminal offense. Judging Process Judges from the Sponsor's editorial staff will apply the Criteria to evaluate the finalists, using a range voting method, assigning a value between 0-9 to each finalist. The project(s) with the highest score(s) will be selected as the winner(s), and the number and type of winners will be as identified in Section A above. Any ties will be broken using the median ballot rating approach (the entry with the highest median score wins). The Judges have the right to disqualify any entry that is not in compliance with these Rules. In the event that a winning entry is disqualified, the next-highest scoring entry will be selected as the alternate winner. In the event that one or more of the identified Judges is unavailable, Sponsor reserves the right to substitute Judges of comparable qualification, to be determined by Sponsor in its discretion. The Contest is entirely skill-based and contains no elements based on chance. The standards applied during the judging process focuses on assessing each entry's properties. By the mere submission of an entry, an entrant acquires no automatic right to be awarded a prize, nor any other right except for the right to have such entry reviewed and evaluated subject to these Rules. Prize Terms. All values are stated in United States Dollars (USD) as indicated, or as converted [currency converter] to local currency. If a stated prize is unavailable, Sponsor has the right to substitute one or more items of equal or greater value, in its discretion. No prize is, and the winner(s) have no right to claim that any prize is, exchangeable, transferable, or redeemable for cash. The winner(s) will be solely responsible for all expenses related to the receipt and use of all prize(s) other than those expenses expressly included in the description of the prize(s) in Section A above. The winner(s) will be solely responsible for complying with any and all applicable statutes, laws (including, without limitation, common law, if applicable), rules and regulations and for bearing any personal income tax, VAT, withholding taxes, customs duties, or other taxes, fees, insurance, surcharges or other costs relating to receiving, claiming or collecting any prize. Winner(s) are hereby informed of the liability to pay all taxes on the prize(s) received; such taxes shall be paid by the winner(s). Each winner shall be responsible for reporting his or her individual income tax generated from the prize to relevant tax authorities on his or her own and, for residents subject to tax obligations on the prize by any country, shall promptly submit to Sponsor a tax payment proof showing that such tax has been fully paid. If the winner fails to submit such proof within a reasonable period of time as required by Sponsor, Sponsor reserves the right to disqualify the winner from entitlement to the prize and the winner shall be deemed to have waived his or her right to claim the prize and shall be further obligated, upon Sponsor's request, to return the prize to Sponsor at his or her own cost. In addition, for winners who are residents of the Netherlands, if the estimated retail value of a prize is more than 454 Euros, each winner is responsible for payment of the applicable Dutch 'lottery tax' (29% of the prize value) and declaration thereof to the Dutch tax authorities. THE PRIZE(S) WILL BE GIVEN AWAY BY SPONSOR AND ANY CO-SPONSOR(S) "AS IS." SPONSOR AND ANY CO-SPONSORS DO NOT MAKE, AND EXPRESSLY DISCLAIM, ANY WARRANTY, WHETHER EXPRESS, IMPLIED, OR STATUTORY, REGARDING ANY PRIZE OR PORTION THEREOF, INCLUDING WITHOUT LIMITATION ANY IMPLIED OR STATUTORY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, OR NON-INFRINGEMENT. SOME JURISDICTIONS MAY NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES, CONSUMER GUARANTEES AND SIMILAR RIGHTS, IN WHICH CASE SUCH EXCLUSION SHALL APPLY ONLY TO THE EXTENT PERMITTED BY APPLICABLE LAW IN THE RELEVANT JURISDICTION. WITHOUT LIMITATION, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ALL WARRANTIES AND REPRESENTATIONS, IN RELATION TO THE PRIZES, WHETHER EXPRESS OR IMPLIED BY STATUTE, LAW (INCLUDING, WITHOUT LIMITATION, COMMON LAW, IF APPLICABLE), RULE, REGULATION, OR OTHERWISE, ARE HEREBY EXCLUDED. Announcement; Award of Prize(s). The winner(s) will be notified by e-mail within seven (7) days of selection. The winner(s) (and, if a winner is a minor, the winner's parent or legal guardian) may be required to sign a Winner's Declaration and Release which includes a declaration of eligibility, grant of publicity rights and a liability release, to the extent not prohibited by law, prior to receipt of a prize. The prize(s) will be awarded by way of delivery to Winner's designated valid delivery address set forth on the Winner's Declaration and Release. Unless otherwise specified in Section A, and provided that direct shipment costs by mail or parcel post (expressly excluding import duties and other duties or taxes, which are the winner's sole responsibility) to Winner's designated valid delivery address shall be borne by Sponsor, provided, however, if delivery is declined or fails by reason of winner's failure to timely accept receipt or pay appropriate import duties and other duties or taxes) then the winner will be deemed to have declined acceptance of the prize and Sponsor reserves the right to reclaim the prize whereupon the prize will be returned to Sponsor and winner will no longer be eligible to receive the prize. The winner(s) may be required to provide Sponsor with a social security number, taxpayer identification or identification card number, or other identification or account number (if applicable) (a Permanent Account Number for residents of India) for tax purposes, and will provide Sponsor with all other information as may be required for Sponsor to comply with all applicable laws in connection with the award of any prize(s) to the winner(s). The winner(s) also may be required to provide Sponsor with proof that he or she is the Authorized Account Holder of the e-mail address associated with the winning entry. An "Authorized Account Holder" is the natural person who is assigned to an e-mail address by an Internet access provider or other organization responsible for assigning e-mail addresses to the domain associated with an e-mail address. In the event of a dispute, an entry will be deemed to have been submitted by the Authorized Account Holder of the e-mail address submitted at the time of entry. Failure to respond to a winner announcement, or return any required declarations or releases within fourteen (14) days (or any longer time specified by Sponsor in the applicable winner announcement) or to comply with any of the foregoing may result in disqualification and the selection of an alternate winner. It is Sponsor's policy to assist U.S. government employees in meeting their obligations under their standards of ethical conduct; any prize(s) won in violation of those Standards should not be accepted and should be returned at Sponsor's expense or destroyed. Without limitation, Sponsor shall not be liable for any failure to deliver any prizes due to any winner's failure to accept delivery, to meet any of his or her obligations hereunder or due to the submission of any false, inaccurate or misleading information. Representations. By entering the Contest, each entrant represents and warrants that: (a) the entrant meets all eligibility requirements of the Contest; (b) in entering and participating in the Contest, the entrant has complied and will comply in all respects with these Rules, the Policies, and all applicable statutes, laws (including, without limitation, common law, if applicable), rules and regulations; and (c) the information provided in the entrant's entry, including without limitation all contact information, is true, accurate, and complete in all respects. Assumption of Risk. By taking any action to create an entry for the Contest, each entrant, on his or her own behalf and on behalf of his or her personal representatives, heirs, executors, and assigns, acknowledges and agrees that: (a) ENTRANT AND HIS OR HER PERSONAL REPRESENTATIVES, HEIRS, EXECUTORS, AND ASSIGNS HAVE THE SOLE RESPONSIBILITY FOR THE CREATION OF THE ENTRY, WHICH IS DESIGNED AND CREATED BY THE ENTRANT FOLLOWING HIS OR HER OWN DECISION AND INITIATIVE DEPENDING ON THE WAY, IN HIS OR HER SOLE DISCRETION ENTERANT DECIDES TO CREATE SUCH ENTRY, AND EVEN THOUGH THE CONTEST DOES NOT REQUIRE OR OTHERWISE ENCOURAGE DANGEROUS BEHAVIOR, THERE MAY BE DANGER AND RISK OF BODILY INJURY, DEATH, OR PROPERTY DAMAGE INVOLVED IN CREATING AN ENTRY; (b) THESE RISKS AND DANGERS MAY ARISE FROM FORESEEABLE OR UNFORESEEABLE CAUSES; (c) SUCH ENTRANT AND HIS OR HER PERSONAL REPRESENTATIVES, HEIRS, EXECUTORS, AND ASSIGNS ASSUME ALL RISKS AND RESPONSIBILITY FOR ANY PERSONAL INJURY, DEATH, PROPERTY DAMAGE, OR OTHER LOSS ARISING OUT OF THE CREATION OF ANY ENTRY, WHETHER CAUSED BY NEGLIGENCE OR ANY OTHER CAUSE; and (d) Subject to applicable law, such entrant and his or her personal representatives, heirs, executors, and assigns are relinquishing any and all rights he, she, or they now have or may have in the future to sue or take any other action against Sponsor, any Co-Sponsor, the prize manufacturers, any other entities involved in the administration of the Contest, each of their respective parents, subsidiaries, and affiliates, and each of their respective officers, directors, employees, agents, and representatives (the "Sponsor Parties") on the basis of any injury, death, damage, or other loss that may be suffered arising from any action taken in the creation of any entry, including but not limited to claims based on allegations of negligence by any of the Sponsor Parties or use of any machinery or materials. Without limitation, Sponsor Parties shall have no liability to any entrant or any other person in the event the entry or any acts or omissions of the entrant violates any of these Rules. Release. To the maximum extent permitted by law, by entering the Contest, each entrant releases and holds harmless the Sponsor Parties from any and all responsibility, liability, damages (including, without limitation, direct, indirect, incidental, consequential, punitive, statutory, and other damages), losses, costs, or expenses of any kind arising out of or relating to: (a) entry or participation in the Contest, including but not limited to disputes among individuals claiming to have contributed to any winning entry; (b) any violation by the entrant of these Rules, the Policies, or applicable laws; (c) misappropriation, infringement, or other violation of any copyright, trademark, patent, trade secret, right of publicity, privacy, or other legal or contractual right of any person attributable to entrant or any entry submitted by entrant; (d) the acceptance, possession, receipt, or use of any prize or any item purchased with any prize (e.g., if the prize includes a gift card); (e) any entries or votes that have been tampered with or that are misdirected, incomplete, non-conforming, corrupt, lost, late, or ineligible; (f) any problems or technical malfunctions (including but not limited to errors, omissions, interruptions, deletions, defects, or delays in operation or transmission) of any computer, telephone, modem, cable, satellite, network, hardware, online system, server, software, or other equipment or provider, including any incorrect, incomplete, garbled or jumbled information resulting therefrom; (g) any Internet traffic congestion or website accessibility or delays; (h) printing or typographical errors in any Contest-related materials; or (i) any other technical or human error that may occur in connection with the Contest (the "Causes"). If anyone makes any claim against any of the Sponsor Parties arising out of or relating to any of the Causes attributable to the entrant, the entrant will pay for any damages, losses, liabilities, costs, penalties, and expenses, including without limitation attorneys' and experts' fees and costs, incurred in connection with such claim. WITHOUT LIMITING THE GENERALITY OF THE FOREGOING, THE SPONSOR PARTIES SHALL NOT BE LIABLE FOR ANY LOST PROFITS OR ANY SPECIAL, INCIDENTAL, INDIRECT, PUNITIVE, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE CONTEST, HOWSOEVER CAUSED, WHETHER ARISING IN STATUTE, TORT (INCLUDING, WITHOUT LIMITATION, NEGLIGENCE) CONTRACT, OTHER LEGAL THEORY OR OTHERWISE, AND ALL SUCH DAMAGES ARE HEREBY DISCLAIMED AND EXCLUDED. SOME JURISDICTIONS MAY NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR DAMAGES AND OTHER LIABILITY (INCLUDING INCIDENTAL OR CONSEQUENTIAL DAMAGES) IN WHICH CASE SUCH LIMITATION OR EXCLUSION SHALL APPLY ONLY TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, RULE, STATUTE OR REGULATION IN THE RELEVANT JURISDICTION. NOTHING IN THESE TERMS EXCLUDE LIABILITY FOR FRAUD, OR FOR PERSONAL INJURY OR DEATH CAUSED BY NEGLIGENCE TO THE EXTENT SUCH EXCLUSION IS PROHIBITED BY APPLICABLE LAW Misconduct. Sponsor reserves the right, in its discretion, to disqualify any entrant who: (a) tampers with the entry or voting process, the operation of the Contest, the Sponsor Site, or affiliated websites; (b) acts in an unsporting or disruptive manner, or with intent to annoy or harass another person; or (c) is otherwise in violation of these Rules, the Policies, or any applicable laws. Termination. Sponsor reserves the right to suspend, modify, or terminate the Contest at any time for any reason, in its discretion, including without limitation in the event of fraud, abuse, tampering, technical, administrative, financial, or other difficulties. In such cases, Sponsor will post a notice on the Contest page of the Sponsor Site. Should the Contest terminate prior to selection of the winner, Sponsor will announce an alternate means of awarding the prize on the Contest page of the Sponsor Site. Any entrant may withdraw from the Contest at any time by contacting Sponsor by email at [] or by phone at (01-510-473-7626) or by mail at the address identified in Section B.18 ("Winner's List; Mailing List") specifying the name of this Contest and any other relevant information. Advertising and Marketing. By entering the Contest, and in consideration of Sponsor's potential review and evaluation of his or her entry, each entrant grants to Sponsor the non-exclusive right to use his or her entry as provided in the Policies, including without limitation the provisions of the Terms and Conditions of Use regarding ownership and use of user submissions. WITHOUT LIMITING THE FOREGOING, TO THE MAXIMUM EXTENT PERMITTED BY LAW, BY ENTERING THE CONTEST, EACH ENTRANT CONSENTS, AND WARRANTS THAT IT HAS OBTAINED THE LEGALLY-BINDING WRITTEN CONSENT OR OTHER LEGALLY BINDING AUTHORIZATION (INCLUDING WITH REGARD TO THE USE AND MANAGEMENT OF COPYRIGHTS IN ALL CREATED CONTENT) OF EVERY CONTRIBUTOR TO THE ENTRY (INDIVIDUALS WHOSE NAME, LIKENESS, PROPERTY, RESULTS AND PROCEEDS APPEAR IN THE ENTRY), TO THE USE BY SPONSOR, ANY CO-SPONSOR, OR ANY THIRD PARTY CHOSEN BY SPONSOR OR ANY CO-SPONSOR, OF ANY AND ALL INFORMATION (INCLUDING PERSONAL INFORMATION), DRAWINGS, TEXT, PHOTOS, IMAGES, VOICES, VIDEOS, OR OTHER MATERIAL CONTAINED IN AN ENTRY OR OTHERWISE PROVIDED BY SUCH ENTRANT RELATED TO THE CONTEST FOR ADVERTISING AND MARKETING PURPOSES. Otherwise, each entrant retains whatever rights it may have in each entry to the extent provided in the Policies. The Sponsor, at its discretion, may require entrants to provide evidence of such written consents or other legally binding authorization. To the maximum extent permitted by law, by accepting a prize, a winner consents on his or her own behalf, to the print and online publication of the winner's user name, stated country of residence and winning entry as part of the official winner's list on the Instructables Site (and to submit this information, along with the winner's first and last name, address, phone, email or other contact information to governmental agencies if required by applicable laws) without additional compensation other than the consideration specified in this Section 15 (Advertising and Marketing) for the entire protection term of the rights concerned and for all methods and means of exploitation. Each entrant and any other contributor whose personal information is being so used by Sponsor may request access to his or her personal information held by Sponsor and that Sponsor correct the data if it is inaccurate or delete the data if Sponsor is not required to retain it by law or for legitimate business purposes. Access, correction, deletion requests or withdrawal of consents can be made by contacting Sponsor by email at [] or by phone at (01-510-473-7626) or by mail at the address identified in Section B.18 ("Winner's List; Mailing List"), however, no consents will apply retroactively to any entrant's personal information used prior to Sponsor's receipt of any consent withdrawal. Other than as set forth herein, Sponsor will treat any personal information supplied by entrants in connection with the Contest in accordance with Sponsor's Privacy Policy, as modified by these Rules. Governing Law; Dispute Resolution. By entering the Contest, entrants agree that these Rules will be governed by and construed in accordance with the laws of (a) Switzerland if the entrant's principal place of residence is in a country in Europe, Africa or the Middle East, (b) Singapore if the entrant's principal place of residence is in a country in Asia, Oceania or the Asia-Pacific region, (c) Brazil if the entrant's principal place of residence is in Brazil, or (d) the State of California (and, to the extent controlling, the federal laws of the United States) if the entrant's principal place of residence is in a country in the Americas (including the Caribbean) or any other country not specified in this Section 16 (Governing Law; Dispute Resolution); provided, however, that in respect of all claims, actions and disputes brought by any of the Sponsor Parties, these Rules and shall be governed by and construed in accordance with the laws of the State of California (and, to the extent controlling, the federal laws of the United States). The laws of such jurisdictions shall govern without reference to the conflicts-of-laws rules thereof. The UN Convention on Contracts for the International Sale of Goods and the Uniform Computer Information Transaction Act shall not apply to (and are excluded from the laws governing) these Rules. In addition, by entering the Contest, entrants agree that any claim, action or dispute arising under or relating to this Agreement will be brought exclusively in (and the parties will be subject to the exclusive jurisdiction of) the Superior Court of the State of California, County of Marin, or the United States District Court for the Northern District of California in San Francisco, except that (other than with respect to claims, actions or disputes brought by any of the Sponsor Parties) if the entrant's principal place of residence is in (a) a country in Europe, Africa or the Middle East, any such claim or dispute will be brought exclusively in (and the parties will be subject to the exclusive jurisdiction of) the courts of Switzerland, or (b) a country in Asia, Oceania or the Asia-Pacific region, any such claim or dispute will be brought exclusively in (and the parties will be subject to the exclusive jurisdiction of) the courts of Singapore. By entering the Contest, each entrant submits to the jurisdiction of those courts and waives any objection to those courts, whether on the basis of jurisdiction, venue, inconvenience of the forum, or otherwise. Notwithstanding anything to the contrary, nothing will prevent any of the Sponsor Parties from bringing an action for infringement of intellectual property rights in any country where such infringement is alleged to occur. Miscellaneous. If any part of these Rules is held by a court of competent jurisdiction to be invalid, illegal, or otherwise unenforceable, such part will be modified by such court to the minimum extent necessary to make it enforceable while preserving to the maximum extent possible the original intent of and the remaining parts of these Rules will remain in full force and effect. Nothing contained herein or in any of the Contest related materials should be construed as an endorsement by Sponsor of any Co-Sponsor, or of Sponsor or any Co-Sponsor of any third party, product, or service. Notwithstanding anything to the contrary, Sponsor may decline to process requests that are unreasonable or unreasonably repetitive. Winner's List; Mailing List. The user name(s) and entries of the Contest winner(s) will be posted on the Contest page of the Sponsor Site, within fourteen (14) days of the Deadline. In addition, the names of the winner(s) may be obtained by sending a written request and a self-addressed, stamped envelope to the below address (mailed requests must include the words "WINNER'S LIST" and the full name of the Contest prominently in the first line of the address): Instructables 82 2nd St. San Francisco, California 94105 USA   or by contacting Sponsor by email at [] or by phone at (01-510-473-7626) or by mail at the address identified in above. All requests must include the words "WINNER'S LIST" and the full name of the Contest prominently in the subject line or in the voicemail, as the case may be. All such requests must be received within six (6) months of the Deadline. Sponsor's telephone number for Contest purposes is (01-510-473-7626). Entrants who opt to join Sponsor's electronic mailing list agree to be contacted by email by Sponsor. Requests for removal from Sponsor's mailing list may be made as instructed in any such email, or by sending a written request and a self-addressed, stamped envelope to "Instructables Mailing List" at the above address, by calling the above telephone number, or as otherwise indicated on the Sponsor Site. Residents of Vermont may omit return postage on winner's list and mailing list requests. © 2012 Autodesk, Inc. All rights reserved. INSTRUCTABLES is a registered trademark or trademark in the United States of Autodesk, Inc. Other brands may be trademarks of their respective owners.

Topic by SHIFT!  

Help to make a self watering drip irrigation system (using an air well+gravity pressure drip irrigation)

Hello, lately I have become interested in DIY drip irrigation systems and have begun building one myself. The I started thinking:" wouldn't it be great if I didn't have to manually fill up the tank?" and remembered that there was already a very low tech way to get water: the air well!! Well, why not put the two things together? The air well collects the water and then this is distributed to the plants through the drip irrigation system. Obviously people have already thought about this (here's a link to a great project, but I was thinking if there was a way to build something even less technological, i.e. with no pump (I would rather use gravity instead) and no special condenser, but rather something made from recycled/easy to get parts. After all I don't live in a desert, so a less efficient system would do just fine. It's just so that I don't have to carry heavy buckets of water to quench the thirst of my synergic garden. Cheers

Topic by wilson14  

How to build an Arduino controlled 120VAC relay with an indicator LED? Answered

I am working on a project where I am going to collect grey water under my sink and use an Arduino to run two relays. One relay will turn on a pump that will move the water in the reservoir to the tank of the toilet. The other relay will turn a valve connected to the municipal water supply of finish filling the tank if necessary. The float valve in the toilet will make sure the water does not overflow. Does anyone see any problems with the circuit I have built? I am new to electronics and cautious as I bridge the gap between my 5v world and the 120v world beyond. Thanks for any help you can provide.

Question by porternick    |  last reply

Help to make a self watering drip irrigation system (using an air well+gravity pressure drip irrigation)

Hello, lately I have become interested in DIY drip irrigation systems and have begun building one myself. The I started thinking:" wouldn't it be great if I didn't have to manually fill up the tank?" and remembered that there was already a very low tech way to get water: the air well!! Well, why not put the two things together? The air well collects the water and then this is distributed to the plants through the drip irrigation system. Obviously people have already thought about this (here's a link to a great project, but I was thinking if there was a way to build something even less technological, i.e. with no pump (I would rather use gravity instead) and no special condenser, but rather something made from recycled/easy to get parts. After all I don't live in a desert, so a less efficient system would do just fine. It's just so that I don't have to carry heavy buckets of water to quench the thirst of my synergic garden. Cheers Another cool thing to make would be a poor man's version of this

Topic by wilson14    |  last reply

Where can I find a/an (ideally black) watertight fabric that could be used for a solar water heater?

I'm in sunny New Orleans, and we are encountering a ridiculously cold snap.  I don't keep my house too warm, so I'm dying with electric heater cost.  Since I know my windows are one place where a lot of solar might be collected, and energy is lost, I am trying to find a way to collect passive solar energy. The idea is to sew several tubes into watertight fabric in a design like a radiator, and then fill them full of water.  The idea is that this will absorb the heat from the sun and then, as night falls, act as insulation against the cold.  And I am hoping that I could hang them in the windows of my house and remove them when it warms up. Does anyone have a suggestion for watertight fabric that I could use for such a project? Thanks D. Adrian

Question by Bannanaman    |  last reply

Proposed Evaporative Air Conditioner

Have an idea for a Evaporative Cooler.  In most conventional coolers a fan pulls warm air through a panel that is constantly soaked in water, the water pulls the heat from the air.  Another form of this system is the simple "Mister Jets" that spray a fine mist into the air which pull the heat from the air dropping the temperature.  My idea is a combination of the two... See Image. The concept is simple... - Fan pulls warm air in and forces it into the body of the cooling unit. - A mister sprays a fine mist that combines with the air pulling the heat out. - To remove the fine air molecules a synthetic membrane (like pond filter material) is used to collect the vapor and allow the air to pass freely through. - The resulting water will make its way down the membrane and drip into the water basin below. - The pump will then recirculate the water back through the system. Seems like an easy enough system, the only problems I can see are... - Mildew - Leaks - Filter doesn't remove all the water So let me know if you guys think this will work.

Topic by scubaru    |  last reply

Reverse Graffiti

The artist Moose creates graffiti on walls not by adding paint, but by removing dirt. He's been doing this for a few years now and he originally just used a sock, water, and a bit of soap. In this video we can see that he's moved on up to using a pressure washer and stencils to create 140-foot murals. via Wooster Collective

Topic by fungus amungus    |  last reply

Fluid dynamics: can you connect 55-gal barrels in series to lawn sprinklers to circulate and keep emergency water fresh?

I saw several Instructables about how to use barrels to collect and store rain water.  It doesn't rain enough where I live for this to be practical -- however, I have five blue 55 gal barrels that I use to store water for emergencies. I would like to hook all these together with PVC and run my lawn sprinkler system through them, so that the water stays fresh and drinkable. As it stands, I have to store the water with bleach, and dump it all out every 6 months and start all over again. Big waste, and a bigger hassle. Often as not, I am sitting on 275 gallons of undrinkable swamp water at any one moment in time! -- My question concerns the physics surrounding the fluid dynamics. Is this workable -- running PVC between each barrel in series? -- or does that reduce the pressure to zilch at the end, so pressure wouldn't be high enough to water the lawn and garden? Would you have to put a bleeder valve in the top of each barrel so you could completely evacuate all the air? I really hope someone has actually done this, so I don't waste my time and money making something Mr. Wizard would just laugh at!

Question by wobryant    |  last reply

Technology Makes Cheap Drinking Water from Air

INTRODUCTION:   How can we best apply basic technology to help the underprivileged and/or disaster-hit countries like Haiti? Daily hygiene and nourishment are among the top needs for disaster ridden regions!  Simply put, no water means no hygiene. The Romans understood that over two millennia ago and created their complexly beautiful aqueduct networks for handling both fresh and wastewater! Other ingenious water systems like “air wells” have been found in the city of Theodosia (cf: discovered in 1900 by Zibold, see Zibold’s Collectors/Dehumidifiers) dating back to Greco-Roman times during the Byzantine Empire. These were strictly passive systems that naturally dehumidified air, collecting its potable water in underground basins. All air, even in relatively dry desert regions, will precipitate or release its natural water content (initially in the form of vapor) through condensation when it hits its dew-point temperature and below. That means you “chill” it to an appropriate level that is anywhere from 5F to 50F below its current air temperature, depending upon how much water content (relative humidity) it has locally absorbed. The condensation of the water vapor releases its internal latent heat (reheating the cooled air) which must be constantly dissipated (absorbed by something) in order for water formation to steadily continue. So how do we dissipate this resultant vapor-heat and chill our air without any infrastructure or electricity, in an underprivileged or disaster-ridden region? We simply bury a long cast-iron or any metallic drain-pipe sufficiently underground where the temperature of the earth is naturally held to a constant at around 45F to 55F. That’s our “free” chiller gift from nature. One end of the pipe, Figure-1,  sticks out of the ground to suck-in local outside hot air, and the other end dumps cooled dry air and water into an underground cistern where it gets collected and is piped to the surface to both exhaust the cooled dry air and connect to a water pump. We need a hand operated water pump to lift up the water above ground, and we need an electric fan to constantly pump air through the ground-chilled piping system. We can even force the cooled piped air to exhaust into a tent-like structure where it provides air conditioning as an added bonus, but this adds the penalty of both power and the increased fan size necessary to drive our required airflow further into an enclosure! While this concept is not “passive” (requiring electricity to work) like those clever Byzantine air-wells, it will produce much more potable water and within a smaller volume than those elegantly passive historic devices. The electricity for our fan power requirements can be produced by any one of four ways using either “active” or “passive” techniques: 1) An active playground or bike-pedaling-person or oxen-driven mechanism-generator, 2) A passive windmill generator, 3) A passive solar energy collection system that directly generates electricity, or 4) A passive thermo-electric system that directly generates electricity using the Peltier effect, operating solely on temperature differences between the cell’s top and bottom surface (we jury-rig the cool pipe and hot ambient air to contact separate sides of the cell). Depending upon how much water is needed, the required air volume plus pipe length and diameter, together with the fan will be sized accordingly. We can also configure groups of parallel fan-driven air pipes that are radially fed into the cistern. The sizing of this underground network depends upon the ambient air’s local average temperature and relative humidity (how much water gets absorbed into the air) plus buried pipe depth and effective underground temperatures achieved. The basic concept is one where we “wring” water from air at some given humidity content. The higher its relative humidity the more water is recovered from the air. The air-wringing process simply chills the air as it scrubs along the cooled internal pipe surface until it starts to rain inside the pipe from condensation onto its surface. The condensation is like the dew that forms on car windows, grass or any cooled surface in the early morning, before the sun comes out and evaporates the dew back into the heating air. A further bonus is that our dew-formed water is naturally distilled and very clean. It is potable water ready to drink without the need for additional sterilizing agents. Of course, we must make sure that the interior piping and cistern network is biologically cleansed before burying it underground. The hand pump with its 10 to 15 foot extended piping to reach the underground cistern must also be cleansed. The beauty of this constantly replenishable water supply is its convenient underground installation anywhere! After the in-ground installation, we have a virtual, partially passive, no moving parts, non-breakdown system containing above ground total access to all moving parts that could breakdown, namely the water pump and electric fan. Also, it is easily maintained, with few moving parts (water hand-pump and electric fan) and basically lacking any technical complexity which makes it ideal for technologically backward regions. The example below uses a relatively small industrial fan moving air at 1500 CFM (Cubic Feet per Minute) with a DC motor rated at 1kW. This fan together with our underground piping system will conservatively generate 12 GPH (Gallons Per Hour) of potable drinking water without need for any purification chemistry. Based on an average electrical cost of 14-cents per kWh (kilo-Watt hour), the typical commercial distillation of one gallon of drinking water costs roughly 35-cents as compared to our cost of only 1.2-cents. Furthermore, if we decide to go green and use solar energy for generating our water, it would effectively cost us nothing beyond the initial installation! USING A PSYCHROMETRIC CHART TO SIZE OUR WATER SUPPLY: The following gets a little technical and is only provided for those die-hards who are truly interested in how the science works. Those non-technically schooled may skip this part and not miss the basic concept. Figure-2 shows a Psychrometric Chart for air. This chart summarizes some of the basic thermodynamic properties of air throughout its typical range of operating temperature. The chart uses six basic air properties that defines the physical chemistry of water evaporation into air:  (1) the enthalpy or total energy contained within a unit of air which is a combination of its internal and external energy, expressed as the amount of BTU-energy per unit mass of reference dry-air, (2) the specific volume or the ratio of a unit volume of local air to its mass of reference dry-air, (3) the humidity ratio or the amount (mass) of moisture in a local unit of air divided by its reference mass of dry-air, (4) the percent relative humidity per unit of local air, or the mass ratio (expressed in percentage form) of the partial pressure of water vapor in the air-water mixture to the saturated vapor pressure of water at those conditions (the relative humidity depends not only on air temperature but also on the pressure of the system of interest),  (5) the dry-bulb temperature or the locally measured air temperature, and (6) the wet-bulb temperature or saturation temperature which is the local air temperature experienced during constant water evaporation (a wet-bulb thermometer is typically used:   a thermometer that measures resultant temperature while wrapped in a water wet-gauze and spun to generate local air movement and max-evaporation)  1.0   The Process and A Sample Calculation Our Psychrometric Chart uses six thermodynamic properties that help to determine the amount of water available for extraction from the local ambient air as a function of its temperature, pressure and relative humidity.  Let’s assume the following local ambient conditions for the region we plan to construct our water system at:  (1) Typical daily air temperature Td = 106F and one atmosphere pressure assumed at sea-level, (2) Relative Humidity, RH = 55%, and (3) Typical underground temperature down at six feet is measured at Tu=55F (at 12ft. it drops to ~45F). This yields the following calculated results for obtaining a steady-state supply (changes at night) of water to fill the cistern:      1)      In our example, the “local” air (dry-bulb) temperature is Td=106F, at a relative humidity of RH= 55%.  Fig-2 indicates that the resultant Humidity Ratio is HR= 0.0253 Lbs-water/Lb-Dry-Air (intersection of Td=106F line and RH=55% line, then horizontal to HR value).  We then determine the “gulp” of air volume containing the HR Lbs-water which corresponds to the point of intersection of Td and RH. Interpolating on specific volume “mv” yields mv=14.7 ft3/Lb-Dry-Air (this value sets the optimum unit airflow for our given ambient conditions, and creates a ballpark pipe length to diameter ratio needed later). It represents the basic unit of air volume that will enter our underground pipe per given time, and ultimately defines the size of our fan and piping network. For increased water creation, multiples of this unit volume will scale up the additional amounts of water that can be collected. 2)      As the inlet air cools down to a temperature of Tu=55F, from contact with the relatively cold underground pipe, we follow the constant enthalpy line (red upward left-diagonal) from the intersection of Td and RH to its saturated air temperature condition of Ts= ~88F, which is its dew-point temperature where the corresponding local RH=100%.  At this temperature or under, the air precipitates and releases its moisture content, resulting in water condensation onto the pipe walls.  Since our air will chill to a final pipe temperature of Tu=~55F, we follow the RH=100% saturated curve (green) down to yield an HR=~0.009 Lbs-water/Lb-Dry-Air. This is how much water is left in the air when it gets to 55F.  Therefore for every pound of local outside air that enters the pipe, mw=0.0253 – 0.009 = 0.0163 pounds of absolute pure, distilled potable water precipitates onto the inside pipe wall (per pound of dry air that is cooled and dehydrated) to gravity-flow out the pipe exit and into the cistern. 3)      We now convert pounds of air per unit time into a unitized volumetric airflow that yields gallons of hygienically pure potable water production per unit time. For every Va=100 ft3 of local volumetric air movement per minute (CFM) through the pipe, which translates into ma=Va/mv= 100/14.7 = 6.8 lbs. of dry air per minute or 6.8 * 60 = 408 lbs. per hour (PPH), to yield a water-flow of mwf=ma * mw = 408 * 0.0163 = 6.65 PPH or 6.65/8.345 = 0.8 GPH of water.  An industrial fan rated at 1kW DC will typically move 1500 CFM at a pressure of 8-iwc, to continuously produce 15 * 0.8 = 12 GPH of pristine potable water. 4)      Not shown here are the design details of sizing our pipe, fan and solar collection system for electric power requirements using heat transfer principles coupled with a thermodynamic heat balance, and aerodynamic fan performance assessment. These details help to size the electric power generation requirements plus margin used to properly size a solar collector containing further margins for overcast days. The engineering involved here is straight forward but beyond the scope of the current project.

Topic by RT-101    |  last reply

3D printing a planetary step up drive

I need some help.  I am trying to design a self contained non electrical hydroponic system & part of it will have a water wheel that is supposed to lift more water up to a collection bucket up top to start all over again.  But the issue that I am having is that I have no idea how to design gears for 3D printing & I also am no expert in planetary gear workings.  So I am looking for some help.

Topic by sofiadragon1979    |  last reply

Free Air Conditioning, Free Water, Cheap CNC...

Function clickclear(thisfield, defaulttext) {if (thisfield.value == defaulttext) {thisfield.value = "";}}Sign-up for our newsletter subscribe August 23, 2007 Welcome back! Why just relax this weekend when there are tons of cool new projects to try out? Check them out below. How to make Evil Childproof caps easy to open With no kids in the house, why deal with childproof caps?posted by SFHandyman on Aug 22, 2007 How to Harvest Squid Ink Clean your own squid, and collect ink for printing or cooking! posted by canida  on Aug 23, 2007 Life-size Skeleton Pumpkin Carving! Get ready for Halloween early with this advanced bit of pumpkin carving.posted by mcraghead on Aug 21, 2007 FeatureIn-line headphone amplifier Use a single AAA battery to amplify the sound from your PC.posted by neelandan on Aug 20, 2007 Cart Bike Shopping cart + bicycle = a DIY system for moving lots of groceries.posted by zieak on Aug 20, 2007 $1,500 top prize! Share your quick and delicious recipe and get published in Real Simple! Propel yourself to greatness. Hack a Toilet for free water Add a sink to your toilet and wash your hands without wasting any water.posted by nak on Aug 20, 2007 Drinking Glasses from Wine Bottles Put those colorful bottles to use by making them into attractive water glasses.posted by fstedie on Aug 20, 2007 Easy to Build Desk Top 3 Axis CNC Milling Machine Make your own CNC for well under $200.posted by Tom McWire on Aug 17, 2007 How to make a $20 ice pack for $2 Make your own gel pack and soothe those sore muscles.posted by royalestel on Aug 17, 2007 Free Air Conditioning Technically it's a heat exchanger, but it's still a free way to get cool air.posted by Vyger on Aug 16, 2007 Now go build something awesome, and I'll see you next week! -Eric

Topic by lebowski  

LED panel lights with water damage - other uses?

We had a slight roofing problem at work and as a resul a lot of our recently installed LED panel lights got flooded.Now, I though: How hard can it be to fix them....Surprisingly these flat replacements for flouroscent tubes are actually manufactured in a way that you can take them fully apart if you dare.Like some old computer or flat TV screens they use a row of LED's and then some sheets to direct and distribute the emitted evenly throughout the entire panel - like a backlight with no screen.What was a surprise however is the size of the LED's and how they are "soldered".Obviously a mass production in a reflow system.First problem for me was that the LED's used are right between two commonly used SMD sizes.So a 0204 is far to big while a 0102 won't even touch the solder pads.For once I did the smart thing and decided to try to remove at least the clearly faulty and correded bits first and did not order a bunch of LED's...A drop of glue is used to hold the LED's in place until they are soldered.But unlike any glue I encountered for this purpose the stuff won't come off.You can use proper double sided soldering tweezers or a heat gun to soften the solder but the LED itself won't come off.Last resort was to increase the temp of the soldering equippment to soften the glue or to even fully melt it.Lets just say the plastic film making the acutal connections like a circuit board does not tolerate the heat required...I have now a bunch of useless lights, some still working LED power supplies...Was wondering if anyone ever tried to make a backlight screen or one of these panel lights work in reverse?Meaning using natural light on the panel to "collect" it at the thin bit where the LED's were located.Might be useful with some fibre optics or solar cells.Are there other good uses for these films, foils and sheets in a backlight system?Don't want to toss them out only to realise a few weeks later these things are actually good for more things...

Question by Downunder35m    |  last reply

Non-toxic, natural, cheap and WATER-PROOF adhesive or glue, is this impossible?

I'm a quality engineer working for a company in Turkey, the company collects the coaldust ( powder form of the coal )  from all the cities of Turkey and makes them briquettes by pressing with very powerful machines. Of course we use some adhesives for mechanical strength of the briquettes. We use CMC (a kind of cellulose) and this material is soluable in water. So our briquettes are not very durable under rain or moisture. Now I have to change the binder or adhesive materials in order to produce waterproof briquettes. I dont know how it's possible. I have to use nontoxic natural materials, and cheap as well. Last week I tried to do something but we were unlucky maybe. I tried to use Technical Gelatin and Alum (Al. Sulphate ) together, the briquettes seemed very good after production but they were not durable when I left them in a cup of water. So I have to find a solution now. Can you help me about that? I'd be very pleased. Thanks.

Question by enisdogru    |  last reply

where do i find free 55 gallon or more barrel here in toronto, canada?

Can you please give me suggestions where i can find a free 55 gallon or more barrel for rain water that i plan to collect? i'm currently located in toronto, canada. really appreciate any help i could get!

Question by leilamae    |  last reply

Cleaning the oil for a vacuum pump

Was too lazy to do an Instructable about it and think a lot of pics or even videos won't help much if you know what I mean ;) Some of us use rotary vane pumps not for the purpose of evacuating refrigeration systems but for all sorts of fun and experiments. This means quite soon or often we face the problem of the oil taking in a lot of water or even worse particles and solvent fumes. I don't know about you but I was getting sick and tired of replacing the expensive oil every few weeks or sometimes even days if something got too wrong. There are many different blends of compressor oil out there that will work very well in our rotary vane pumps. The main difference is whyt the oil is designed for. Some are perfect for aircon systems, others for the work with solvent fumes and there are even those special oils that bind moisture. Unless you really need to evacuted special gases or solvents basically any low viscosity oil will do us just fine! So instead of paying 20 bucks for special compressor or even vacuum pump oil we can select the cheap everyday oil. Well, not exactly... We also want to be able to recycle our oil to save even more money. That means we don't want an oil that binds to water to keep it out of harms way. We also don't want any oil that has special coating abilities for example these oils claiming to reduce wear and tear on your engine. But any other low viscosity mineral oil or if you prefer synthetic oil will do - just stay away from silicone based oils!! If you have not used your pump for a few days you can often see a slude at the bottom of the viewing glass. If the rest of the oil is clear you can simply drain this worst bit and top up with fresh oil if required. This simple procedure saves you a lot of oil already, at least if your pump has some rest every now and then. Once your oil looks wasted it is time for the recycling and cleaning: Release the oil into a high glass jar or these facy spaghetti glasses. Fill with fresh oil and give it a short run. Release this oil as well and wait for it to properly drain. You now have the inside of your pump nice and clean again, time to fill one last time with fresh oil to keep using the pump. The filthy oil we now have in our jar should be covered with some fine cloth or filter paper and placed somewhere warm. After a week or two the oil, filth and water will have seperated and you pump, drain or siphon out the now clean oil for further use. Don't be too exact here trying to get all the oil out, just remove what you can without risking to suck in the filth from the bottom. Simply leave the rest in the jar and add the next oil change to it for the same recycling process. Solvents.... In some cases we will work with solvents and that means the oil might bind to them. Acetone for example is quite nasty here and can change the oil itself by breaking down certain components. In most cases it means the viscosity will be reduced, which is not really too bad for us. What is bad however is the fact that these solvents often refuse to fully seperate or evaporate. Once the oil looks clean do a smell test and if it smells like solvent then for sure there is solvent in it. Next step to confirm is to do a lube test. Simply place on some smooth metal or glass and smear it with your finger - a drop is enough here. If it feels sticky on the surface, gives you a rubber like feeling when sliding over the surface or is far less "slippery" than the fresh oil you also have a problem. I found that filling this contaminated oil into a proper container and applying a strong vacuum will remove all solvent residue in a very short time. Downside is that the oil in the pump is contaminated again, so it pays off to collect solvent contaminated oil seperately and once you got enough for several refills use the pump to get rid of the solvent. When done do another smear and smell test, if still smelly repeat if no longer smelly but still the same bad feeling on the surface: Discard as the oil might be broken down by the solvent.

Topic by Downunder35m    |  last reply

Hydrofoil Surfing - A New Adrenalin Sport

Listening to Silvio Rivier, the host of Global Village, there was a section on Hydrofoil Surfing. I turned to the television, interested by this large word, to see this guy surfing a foot above the water! It seems that instead of floating along the water like a normal surfboard this board actually would be below the water while you stand on it. A jet ski pulls the surfer up to speed, bringing him up to the top of the water, but that's not it, there's a fin that leads down a foot and a half or so below the board, and attached to the end of that is a special shaped piece of metal called a hydrofoil that collects the water as it comes up from the bottom of the sea and goes over as a wave. The surfer then keeps going upwards, until the "foil" is about 4 inches under the water. Therefore the surfer can balance above the water, with very little resistance & going very fast. It's technically possible that this could be used for surfing not just close to land, but hundreds of miles out, so the person can surf for as long as their legs hold out, because they can surf in rougher water. Does any body think they could build one of these? Balancing on one is supposed to be like using a uni-cycle, & I'm having trouble surfing normally so even if I did build this I probably couldn't ride it. This goes out to Laird Hamilton, the creator of this funky board, & I'm looking forward to an Instructable. Cheers everybody, ~K P.S. The links aren't working so I'll add them as soon as possible. Neither is the video button, sorry about that, I'll have to add a picture instead.

Topic by Kryptonite    |  last reply

DISCLAIMER for an old instructable

This instructable is missing vital, or rather deadly information: posted a comment on it, but i doubt anybody will read it. if it is already contained in the instructable, and i haven't seen it, please forgive me.: HeLLO!!!!! I lnow i am VERY late with this post, and i hope someone still reads it.NEVER DRINK URINE! EVER! WhY? well, for one, fresh urine contains no bacteria, unless you suffer from bad kidney disease, in which case, you probably couldn't pee why not drink it? because ALL TOXIC WAIST of your body leaks into your urine. those remain inside this primitive distillation device on the soil ,as mineral salts, the water being evaporated and recondesed on the foil, thus recuperated. so, this thing is basically a sun powered water distillation thingie. in emergency situations, you can distilate your urine by other means too, to drink water out of it. just DON'T DRINK URINE, NOT EVEN BOILED. ESPECIALLY NOT BOILED. the water getting evaporated by boiling, the urine increases the concentration of toxines. you can only boil it up to collect the steams, which condense into water. that's what you wanna drink.

Topic by DonQuijote    |  last reply

iRobot Scholarship idea : Pool Cleaner

I've seen mods for the roombas before, where the robots are water sealed, and then the wheels are turned into propellers. My idea is that I could water proof the robot in plexi glass, or something, and then a net on it, to collect all the leaves, dead bugs, and other stuff that collects on the surface of a pool. normal pool cleaners only vacuum the floor of a pool, and it takes days for floating leaves and other grime to sink to the bottom. With a robot like this, I could just set it in the pool, and let it clean everything up. What's nice is, when company is coming over, it's embarrassing to have a dirty pool...this modification would allow you to quickly clean up your pool-even on short notice. Update (for some clarification): What I would want to do, is make a case for it, so that you can simply remove the wheels, and connect the propellers/steering device to where the wheels were, then just place the roomba in the watertight case, and it would be able to swim around and clean! Also, i'm working on some sketches of how it would work. I'll post those when they are done.

Topic by Weissensteinburg    |  last reply

What equipment is needed to fill an appropriate cylinder with oxygen generated by the electrolysis of water?

Update: I need someone that has experience with gas cylinders to point out potential dangers that would be present by filling this way, We've already discussed water vapor and oil potentially making its way inside. That doesn't sound good to me so I need certainty that its safe or those can be eliminated or reduced to safe levels. Right now I would really like to know what I need so I can refill tanks myself. I'm guessing its a special adapter or replacement valve, but I don't know where to start Original: Would it be possible to fill an appropriate oxygen tank with the right adapters/compression system with the oxygen generated by electrolyzing water and what kind of equipment would be needed? I know for propane you can buy adapters and refill/transfer from one to another, but obviously this is completely different, and I don't know anything about oxygen valves/adapters or compression systems. Yes I know this could potentially be very dangerous and also have no interest in collecting the hydrogen. Just to clarify we are talking about commercial grade tanks, not a 2 liter soda bottle. Also, if possible how high of purity would be expected using optimal electrodes and electrolytes to prevent corrosion and impurities. Any information at all would be very helpful.

Question by NathanE31    |  last reply

Science test idea's. I want something cool and geeky

Hey, I have got a science project which means my parrents will fund it for 1. and 2. It's an awesome chance to do a massive nerd project. We have to beable to collect data. The sheet has some idea's just to give you the jist of what should be done. But i want something alot better. Which freezes first hot or cold water? So any idea's.

Topic by Flumesoft    |  last reply

Anybody know were I can get two or three old satelite dishes.?

I would like two or three of these. They don't have too be any bigger than two feet. The more I think about it the more I want some of these. I want to make a mirror death ray, A water collection system and a super ear microphone. Also if any body knows of some other large parobolic dish I am open to sugestions.

Question by nurdee1    |  last reply

I got a barrel but am unsure what was in it. If I take it to a car wash and hose it out, will it be safe to use?

I am setting up a rain barrel collection system to water my vegetable garden. It is a very large white barrel. I received it from the composting/recycling center at work and they weren't sure what was in it. They already used a pressure hose to rinse it out. I am planning on taking it to a car wash and spending quite a bit of time hosing it with soap and then rinsing. Is this a good idea.

Question by Bruster    |  last reply

Extreme water cooling idea for computer chilling plus dust protection

I started to play around with some compressor cooling devices, otherwise known as fridges, freezers or airconditioners ;) As with everything it started with a lot of reading, some doing, more reading, well you get the point... Anyways, I am now running an old and portable split airconditioner on hydrocarbons instead of the already escaped R22 refrigerant. With all this experimenting I got reminded that my computer does not really like to do hard gaming work on these hot days. There are already a lot of infos out there on how to use water and/or heatpipes to cool your system. One thing that they all have in common is that you need a chiller to cool the water. Now, there are really tons of options here - from using an old bar fridge to hold the water up to big direct chillers that can be used 24/7 and cost a small fortune. Here in Victoria the weather might be more forgiving but up north the humidity will be your main enemy if you want to use any decent cooling system. Imagine 90% humitiy and the water condensing on pipes and coolers inside your computer... Some systems compensate here by using a temp of around 12°C at the lowest to minimise the risk of condensation. But I think we can do better for cheaper if we are willing to get dirty and salvage some scrap. If it also a great way to protect your computer in a dusty and hot workshop enviroment! Let me explain the thought: Considering the costs for a decent air cooled system over the expense for just a basic water cooling kit it might be worth spending the extra money otherwise. What makes a normal and not overclocked computer go too hot assuming it is clean and free from dust? Right - the outside temperature and how hard we actually use it. Normal systems are designed to work at a room temp between 18 and 24°C, we are often lucky to have it under 30 in the summer. Getting a CPU to just under 70° if the outside air is already over 30° is hard if not impossible. But what if the computer would be in one of these fancy server rooms that are kept at 16° throughout the year? Problem solved, just win the lottery to get your server room build. Step back a bit and think again ;) If we make an additional and well insulated enclosure to put the computer in we would only need to worry about making it pretty much air tight and keeping the inside always under 20°C. Now follow me to my imaginary shopping trip... First step is getting a decent sized cooler box - you can build your own of course I would go for these oversizes Esky chests. Next step is a visit to the local hard rubbish collection or scrap yard. We look for a bar fridge or water cooling tower that has a condenser that will fit on the side or back of our cooling box. Prefer something old running on R22 instead of R134a if you can. If the system already has one or two service ports for filling even better, otherwise see you get one from a different fridge or freezer. The fun starts back home where we now make a big mess. The cooling system needs to come apart and if not a tower the fridge around it has to go without damaging pipes or condensers. Perfect would be to have a working system and to keep it in this condition to avoid the illegal escape or refrigerant. It also make it easier than having to refill it again. On the other hand getting a system that is already professionally evacuated as most scrap yards now do anyway can make the modding easier - up to your skill set and options to have the system checked and filled. Once we have a naked cooling system we get the cold side into the cooler box. Either by creating a slot to slide it in or by feeding the hoses through holes if you plan to do your own thing in terms of testing and filling. The compressor part and "hot side" are mounted securely to the outside of the box. If you still have the thermostat working and connected you can now check your homebuild fridge. To get the computer inside you have several option, IMHO the easiest is use one big enough hole to get all cables to the outside. You want this hole to end up as airtight as possible, I found candle wax to be a good sealer if you place some painters tape on the box first. So far this was the easy part, the hard part is now to make sure the humidity inside the box stays as low as possible. When the compressor starts cooling the evaporator will go to very low temperatures, even if you set the thermostat to 10° the cold side will condese or even freeze the moisture in the air. Unlike with direct cooling option inside your computer we now have a "cold trap" outside the coputer that we use to our advantage! Easiest option here is to have a catchment under the cold side to collect the condensing water and to let it discharge through a small tube to the outside. Once the system was operating for a few days there should be no moisture left inside our box unless it is not properly sealed. At this point you could be tempted to just set the thermostat to the coldest possible - I advise against it! Imagine the inside of the box is below freezing - the capacitors won't like it to start with and since we now have all surface subcooled the moisture can condense everywhere not warm enough, including your mainboard. A temp of around 10°C should be more than enough for normal gaming and gives the compressor a chance to turn off every now and then so any ice can drop off and exit. If you like the idea use it and make a featured Instructable out of it, my time is too limited at the moment to get serious with this.

Topic by Downunder35m    |  last reply