Rapid decompression cooling? Answered

Is a possible way to super cool a gas (nitrogen or oxygen) to liquid temperatures by using a sub-zero tank of 5000 psi compressed air to blast that gas over a radiator and therefore cool the gas in the radiator to a liquid, then quickly pump it to a chilled high pressure insulated tank.

Question by jj.inc   |  last reply


cheap aluminium for cooling transistors and such? Answered

I just saw an aluminium stair (costing bout €30~€40) and wondered why i couldnt cut it up, and use it to create a heatsink for transistors and stuff like that. would this make any difference with comercial heatsinks? only in terms of heat-conduction i know shape is a factor, but i'd like not to get into that, i could bend the cut-up stair or something

Question by godofal   |  last reply


SHOW ME HOW TO BUILD A LEGO MP5 step by step?

Show me how to build a lego mp5 step by step

Question by NINJA_BOY_101   |  last reply


Wooden Air Cooled Water Chiller?

Does anyone have or know where to find plans for larger sized air cooled water chillers, such as those that used to be next to ice plants.  The vertical towers had water dropping through wooden, slanted slats which created chaotic air flow through the water, removing heat and chilling the return water.  Essentially speaking, I want to build a tower that can be used to chill large aquaria within outbuildings where fingerling trout are being raised. In doing web searches all I am finding are the heavy duty industrial chillers that are high energy users, expensive, and would not work with solar driven small water pumps. Thank you for any help, discussion or steer to websites. Bill

Question by BillClewis2   |  last reply


how do i make a halo helmet at a low price?

I need it to be a low price cause i dont have any money

Question by rickey812   |  last reply


How to cool my little workshop? Will this work

I have my workshop building i am trying to cool without spending a 1000.00 bucks. I havea small chest freezer forget the cubic feet but it is around 2 ft. by 3ft. in size. I was wondering if i fill 75 5 full of water and instal a coil of 100 feet of 3/8 copper tubing in a coil on the inside running to a 36 inch fan with 75 ft of 3/8 coil on the front and set it to pump 32 degree water to the fan . Do you think this woudl bring a 10ft by 16 ft building down from 100 to 80 degrees ? This would probably be cheaper on electricity over all than a a/c if i could afford one. Can anyone share there thoughts? Thanks alot Andy

Question by andy1917   |  last reply


Help with a cool project involving motorized shoes

I am planning to make a motorized shoe (you strap your shoe to it) and the design and every thing is mostly worked out, but I don't know what motor to use, I was thing this: (http://www.jaycar.com.au/productView.asp?ID=YM2712) Would two of these work, one for each wheel, then would I be able to connect it to the wheels axel, I will use scooter wheels or something similar, kind of like this: (http://www.kickstarter.com/projects/petertreadway/spnkix-wearable-mobility) , but the shoe will be on top of it and there will be a non-powered wheel at the front, any help with the motor etc, would be great.

Topic by ModderMan   |  last reply


Science Section

Is it just me, or is the science section as a whole getting suckier?Science is my best subject. I get A's in school, avidly read Scientific American and other science magazines, read physics and astronomy books, and once gave a 45 minute speech about the viability of Algae as bio fuel (Instructable coming soon) for a science project. So obviously, when I first joined, I ate up the science section, reading through great instructables, like the ones created by egbertfitzwilly (oh, shut up, you know who I mean) and other great instructablers. I loved them. Now however, it seems to be full of toy guns, electronics projects that belong in tech and recipes. Goda**it, just because your beer recipe uses yeast doesn't make it a freaking science fair project! If your instructable doesn't need a second category, DON'T GIVE IT A SECOND CATEGORY. Whoa, that was hard, eh? For instance, this. Its not a bad Instructable, sure, what what the heck is it doing in the science section? How about the ginger beer instructable? Or smart LED's? Or a coding machine? I want, and I'm sure others want, more Egbert and Nurdrage styled instructables, with cool stuff that makes us go "Whoa" and want to do it ourselves, not some of the random junk that people seem to throw in to get an extra 3 hits.

Topic by Rotten194   |  last reply


The Walking Bike

Walking BikeI am trying to figure out how and what type of metal he used to make this Seriously cool and I definitely want to make one.

Topic by laminterious   |  last reply


Does anyone know a cool design for a go-kart?

Frame designs that can hold a diesel engine and a paint job and cool accessories 

Question by TheWilks1   |  last reply


Great event to show off your cool contraptions!!!

I just thought I would let you know of an event I'm producing in September in Northern Ca. It's going to be quite Edwardian-Futurist in orientation and aesthetic. The event is a human-powered, kinetic, rail-bound sculpture race and so much more. We have negotiated with the city of Santa Rosa, Ca., to close down a number of streets and we will be using the Railroad Square Depot parking lot and railroad tracks for our main event. There will be an array of bicycle based contraptions. Exhibitions of Mechanical and Artistic Wonders by all sorts of notorious tinkers from around the Bay Area. (Cyclecide, Kinetic Steam Works, Bryan Tedrick, Todd Barricklow, Neverwas Haul and more) There will be food booths, amazing craft vendors, all day music, random circus acts, large art installations and sideshow performances as well. www.handcarregatta.com

Topic by little green   |  last reply


Look at these cool shelves...... Anyone reckon they could make them?

http://www.yankodesign.com/2010/05/12/second-and-a-half-dimension-shelves/ I reckon some clever person could tell us all how...

Question by cook$   |  last reply


Small BMX bike. Recycle by building somthing cool with the parts.?

I've got a Mongoose brand BMX bike that I no longer ride. But instead of selling it, I'd rather take it apart and build somthing with it. I can't weld, I've only got one bike to hack up, and I'd like to buy as little materials as possible.

Question by    |  last reply


does anyone know how to make a wooden stash box ,not too simple though? Answered

I want to make it out of wood. i want it to be hard to figure out cuz my lil brother is really good at figuring this kinda stuff out.

Question by yespotato   |  last reply


Pics of my ZipZap

Here are some pics of my SMOKIN HOT ZipZap!!!!!!!! (sorry about the somewhat blurry pics, my camera is old)

Topic by nerfer192   |  last reply



Small fan hooked up to a thermosta to cool a computer in vented furniture

I have a tower compute that I have put in a enclosed desk that I cut several vent holes but want to instal a fan as backup with a thermostat to insure proper ventilation. I was thinking buying a small desk fan that fit the space connected to a thermostat inside the enclosed space where the computer sits. 

Question by Richard Breffeilh    |  last reply


Distribution of Solar Heated Water and Any Other Heated or Cooled Water

I started this project about a week ago after seeing the Instructable – https://www.instructables.com/id/How-to-build-a-strikeheliostatstrike-paraboliI made mine out of cardboard and then coated the cardboard – front and back – with fiberglass resin for stiffness. I covered the inside with tinfoil to test it out and find the focal point. It worked great with the focal point at the center of the dish even with the lip of the curve. I then removed the tinfoil and replaced the tinfoil with mirrored Plexiglas. Now it works awesome. I have a 30� parabolic mirror that can ignite wood almost instantaneously at the focal point of the light.Next I constructed the heating coil to run water through. This is made from a large 1 Kg coffee can, 16’ of ¼� copper tubing with end fittings, and the glass lid of a small sauce pan (handle removed). The outside of the coffee can is painted flat black as is the copper pipe. The copper pipe is coiled to a coil 4� in diameter and 6� in length and inserted inside the can with the ends extending from the side of the can through two drilled holes. The inside of the can is not painted, but left shiny. The glass lid is then taped over the hole with aluminum metal tape covering a minimum amount of the glass – about 1/4� around the edge.The coffee can is then suspended over the mouth of the parabolic mirror by a three point 6� chimney pipe stand-off. The can’s mouth is centered at the focal point of the mirror so all of the light being reflected by the mirror must enter the coffee can. Hoses are hooked up to the copper pipe fittings and these lines go to the feed/storage tank.The problem with the conventional set up from here is that the speed the water moves at (slow) to be heated to a great degree causes such great loses through convection, this system is not really feasible. I propose a new idea – or a new twist on an old idea.I noticed that the solar heat generating station use a black water pipe inside a glass vacuum tube to generate heat from the sun for heating water. I said to myself that this is a great idea and plan on building the next heating coil in a vacuum chamber. But, I also came up with the idea that the if the water is heated in this manner, why can’t it be transferred to the storage tank in a similar manner.If the feed lines were suspended inside a larger outer line and the outer line sealed tight and vacuumed the heat transfer due to convection would be almost nil. I estimated that with a total convective area at 100% the use of plastic stand-offs (8 @1/8� thick over 12’) the convective area would be reduced to 0.6%. Unbelievable! Even if this rose to 5% it is far beyond anything in use today by the home owner. Stretches of pipe going 100s of meters would no longer be un-heard of. You could place the dish in a close by field away from the trees and house and pump the heat back without losing it to the ground.This would also work for outdoor wood furnaces if use today. An outer pipe could be added over the existing pipe work, sealed, and vacuumed – almost all heat lose would be gone. And much larger stretches of pipe could be used here also. They would no longer need one furnace for the barn and another for the house. With this system, the pipes could even be run above ground, if desired, in some cases.This could also be used to replace insulation on cooling lines also.The key to the system is minimal contact between the inside and outside lines, and the vacuum between the two lines. Remember, there is no transfer of heat through convention within a vacuum, because there is no air for the heat to transfer through.As with all the new ideas this could get costly depending on the scale of piping you are dealing with – but the savings from reduced heat lose will far out way these cost in the near future.I may get an Instructable out for the Energy efficiency contest, but will be hard pressed.

Topic by strmrnnr   |  last reply


Simple Zapper Idea

I have learned about electricity in Physics class and that to up the voltage of a given source there has to be an alteration in the amount of turns of wire around some magnets. BUT... is it possible to do this same thing in my home on a smaller scale by wrapping wires around some of my powerful earth magnets? The reason for asking is that I want to increase the current flow so that it starts zapping when the wire ends come near, also I want to create a ground based bug zapper for fun that will allow the zap to travel through water (shallow puddles). Sorry if I'm missing some law of physics that renders this impossible for me but I'm not taking the advanced course for science and we only touched on  the topic electricity.

Topic by Ninja Togo   |  last reply


I accidentally poked small hole in freezer cooling line, can I patch it with flex seal or something like it?

Was de-icing my haier mini fridge, when I accidentally punctured a tiny hole in  freezer wall cooling line, it hissed for like 2 seconds. Is it safe to plug back in? and can I patch the hole?

Question by brandon.salinas.319   |  last reply


How can i Make a cool/mini ROBOT in just having a 2 Motors?

                                                                                  Hi there! This is Mark.                                     I want to make a simple robot and I want to make it cool. But I don't have enough money                                      to buy some tools and equipment to be used. Can I have some Advice ? My real question is,                                      "How can I make a cool Homemade Robot?"

Question by coniosis11   |  last reply


DIY water cooler for a tig welding torch

I purchased a tig welder and it came with a water cooled torch,but Idon't have the water cooler to cool it.Can I DIY a simple one?

Question by knowhow69   |  last reply


Show & Tell, Fall 2007

A bunch of cool people came together all at once, and showed off their cool projects. Here they are, live-blogged right from my desk in Cambridge!

Topic by stasterisk 


3D Printer; After plastic cools, begins to separate; what could be causing this?

I just got a 3d printer and my first design came out fine; however, the plastic has a tendency to separate after it's been printed. I've tried preheating and angling the design in a different way; as well as playing with printing speeds and feeds. Any thoughts on what could be causing it?

Topic by SR2018   |  last reply


DMC (Delorean motor company) Back up and running

The DMC company is back up making brand new Deloreans, so if you dont want to buy a crappy one on Ebay, no offense, but check out this link, Delorean

Topic by Pambo   |  last reply


My air conditioner is broken beyond repair, any ideas on how to keep the house cool until we move? Answered

The people we rent our house from decided to "fix" the air conditioning to the house by getting rid of the unit for the upstairs and just making the duct for the one downstairs bigger. Now the ducts are basically clogged with dust because there's no filter that will fit the main intake and the main unit keeps freezing up because it can't handle cooling the entire house. We live in Florida, so it get's very hot, very fast. We're currently looking for a new house, but does anyone here have any creative cooling ideas for until then? I currently have fans upstairs blowing all the hot air out, which is working a little bit.

Question by tieguy   |  last reply


How to make room cooler using air cooler?

I have recently purchased an kenstar air cooler.It has a 12 litre capacity.,but the cooling is not there for the whole room.Can anyone tell me how to make my room cooler as if I'm using a air conditioner.I want my whole room to be very cool.

Question by pvinay   |  last reply


Hydraulic motercycle shock uses?

I recently aquired two hydraulic shocks from a moterbike and i was wondering if any of y'all know of anything cool i could do with them as they are currently just sitting around and taking up space but they are so cool that i cant bring myself to get rid of them

Question by aloving95   |  last reply


katana help?

How to make a large stick into a derable katana ps the pic is just some cool swords

Question by dude787 


I have a pneumatic tube from a bank, what's something cool i could do with it? Answered

 Had it for 5 years, never could figure out the best thing to do with it, but it is too cool to pitch. It's the thing you put your money in and watch WHOOSH away. I've attached a pic of someone who turned it into a handbag.

Question by blorgggg   |  last reply


Physics concepts flash animations

I stumbled on this site with all kinds of cool physics animations a few minutes ago. It has all sorts of animations illustrating physics concepts, from wave behavior to vectors to fluid mechanics to magnetism. It looks pretty cool. Some of the animations are more like just articles, and some are true animations. Requires flash to run.

Topic by Lithium Rain   |  last reply


MYTHBUSTERS PHRASES AND EXPRESSIONS

Every body knows Adams phrase I REJECT YOUR REALITY AND SUBSTITUTE MY OWN or THERE'S YOUR PROBLEM Do you know some more? Give your opinion on them? Which is the funniest to you?

Topic by comodore   |  last reply


A/C-Broke for Aerostar. Need ideas for simple/inexpensive roof replacement?

How to get the van interior cooled without spending too much. Considering cheap 110 volt honda generator, can use for other things. plug in small room A/C or roof venting unit?  Buy used would keep costs down. Watcha think? goguddy

Question by goguddy   |  last reply


Liquefaction of gases?

After separating Hydrogen and Oxygen from water (through electrolysis), how should I go about Liquefying and storing these gases? One method of liquefaction that I've come across is here ( http://1.bp.blogspot.com/_OGu0H7TFUno/SLI8QOVkemI/AAAAAAAAABk/Y0fenD3BvbE/s1600-h/ln2_generator.jpg ), and another is here (http://www.gizmology.net/liquid_air.htm) Both of these include compression, but the latter cools the gas by expanding the room-temperature gas, and therefore cooling it. Which method is best? Are there any others?

Question by Ryan Cooper   |  last reply




making a coffin shaped breather box for my vehicle.would like to put handles on it.looks cool that way

Need ideas as to go about it. needs to be metal if possible around an inch or so in length.small scale.whole thing is around a foot and half long by two or so inches deep.six and half or so at widest point.don't want to weld handles to it because of painting issues[hard to paint around]screws would be fine.just can't figure the best method and material.any and all ideas would be appreciated.thanks

Question by frankentrike   |  last reply


how can i install a led tail lights on my explorer?

Cool new tail lights cant install them

Question by yo man   |  last reply


What can simple yet cool project can I make with a bandsaw, drill, dremel, palm sander, and a circular saw? Answered

I'm interested in woodworking. We were cleaning out our workshop when I noticed a couple of power tools. I was given the ok to use them if i used safety of course. The machines are listed above and I have plenty of plywood to work with. Keep in mind I'm 13 so nothing too difficult :P

Question by patriots8888   |  last reply


Compatible together.

After buying a wireless transceiver , I put it that compatible with a LCD Srceen of Arduino, the data on this screen can be a computer display , so cool, I do not need to record. data.

Topic by yeeyuen   |  last reply


2001 Yamaha Warrior Stalling out when warmed up and wont start back up until cool?

Hello fellow instructable users! I have a 2001 Yamaha Warrior (as seen in profile picture). When ever I go out to ride the four wheeler has a hard time starting. I have to use a lot of starter fluid and patients (about five minutes worth). Once I finally get going it seems after about five minutes, about the time it takes for the machine to really warm up, it stalls out and I can get one more start out of it and then it stalls shortly after. Another important point is the fact that the spark plug is unusually dry. After the bike cools down I can get it to start again and ride for about a whopping five minutes and then its dead until it cools down again. The situation is that something is getting hot and changing, causing the bike to stall. The bike has a brand new battery, ignition coil, and the starter is in very good condition. What should I check for next?

Question by 2001warrior   |  last reply


any ideas for 3d printing

Has anyone got ideas of what would be a cool thing to 3d print? perhaps something with moving parts, any ideas would be appreciated thanks.

Topic by resistanceisfutileiflessthan1ohm   |  last reply


I need your help with this. What in the world is it? Answered

What was is used for.  It is very tiny, but really cool.  It says "Brushsuede",  "Pat Pending" and then something else (unreadable).  It has metal bristles. Thanks for any information.

Question by somethingelse570   |  last reply


What can I make? Answered

I bought a soldering iron today. If you can, please give me some links to some cool Ibles, in which you have to solder stuff, such as a calculator prank, but not that. Thanks, HD.

Question by Hiyadudez   |  last reply


Liquid nitrogen at the doctor

No real point to this but I wanted to post anyways because it is kinda cool.  Went to the doctors office with my wife today because she had this spot on her ear that was bothering her.  Well the doctor wanted to freeze it with liquid nitrogen to get rid of it.  Well of course my ears perked right up because to be honest this was going to be the same time I was even in the same room as this *cool* stuff.  I asked her to pack some up for me to take home.  She laughed and said she wished she could but did not have anything to transport it with.  But she brought in a styrofoam cup about half full of it.  She used a quetip to apply it to the spot on the ear three times.  Then handed me the cup and said "I know the geek inside you wants to play with it.".  Our doctor knows us well.  But the bummer part was that I did not have anything to put in it.  So since the only thing I had to freeze was myself I put the quetip on my finger.  ......Yes this hurt.  But it was still fun.  Then I was left to just watch it boil and then blow on it once in a while.  But when we were leaving I handed the cup back to her since I figured I could not leave with it and it was almost gone anyways.  Then she said something she liked to do with it was to pour it on the floor.  I was pretty cool to watch the "fog" it kicked up and listen to the floor crackle. Anyways, that is my story of the day.  I did not get to do much with it, but it was still *cool*.

Topic by jcaresheets   |  last reply


Removing heatsink from air conditioner? Answered

I got an old (functional) AC lying around and before i get rid of it i tough i'll try to do something with it. I tough about removing the heatsinks from the rear coil and cooling it with another copper tube with water pool flowing in. This way i hope to achieve 2 things : incrase the eficiency of the AC by cooling it with another coil of cold water and heating my pool for free ( and hopefully with better and more constant results than the solar heater) Since im'not HVAC certified, i'll have to remove the heat sinks pieces without removing the refregirant tubings. Any tips on removing thoses?

Question by gazoutg   |  last reply


how would it be if we could make a skimmer?

Wouldn't it b very cool if we could make a skimmer? and ohh i found the website www.stormhawks.com try to check it out .my username is "scorpius acel" there join my squadron.

Topic by sem_on123   |  last reply


What would you include in YOUR detonator

What would you include in your detonator, to make it work, be safe, work better, be safer, make it look cool, make it easy to use, make it whatever you want

Topic by larsjet   |  last reply


What are some good designs for a go-kart that has a diesel engine?

Frame, body, lights, brush gaurd, and anything else i got ideas but i want some more to make a really cool go-kart

Question by TheWilks1   |  last reply


HoloLens

I'm of the few that feel like HoloLens seems like more of a pain than anything because of its perspective crop. For anyone in the dark, here's the article on HoloLens that I'm referring to. It's a cool concept but I don't think it's quite ready for the marketplace. 

Topic by PlasticPanama