Be conservative

I don't mean take a right-wing political viewpoint as much as i mean be careful what you put in this group. Remember, if the book is published, we want it to have the best, the most interesting, the most rewarding instructables in it, not something that looks good but lacks any real understanding or depth, Quality of pictures, grammar and spelling should also be important. Furthermore, i don't think we should post our own instructables over anyone elses instructables. All the instructables here should be subjected to scrutiny and examined thoroughly before being posted. Don't just add your own instructables just because YOU think they're cool. Kiteman started this group so ultimately it's he who decides what can stay and what can go, but if we're careful in choosing a selection of good instructables over a wide variety of categories (K'nex contraptions, fun with LEDs, iPod hacks, etc.) then we won't need to leave anything behind. An example of a bad instructable is my own scalpel. Limited instructions for a very simple project. Bad piccers and spelling. That's the sort of thing we need to keep out. V

Topic by Vendigroth 12 years ago  |  last reply 12 years ago


Contest Idea + make the world more sustainable

Many states seen facing water shortagesYeah, it's pretty bad - but I keep seeing lawns watered (anger)...Just throwing out a suggestion -- a project contest that tackles a focused global issue... Water conservation, for example. There's already a few great ones on the site too.

Topic by trebuchet03 11 years ago  |  last reply 11 years ago


Skip suggesting "for easy printing"

When you hover over the PDF icon a bubble says "Download as PDF for easy printing and offline viewing".  I suggest you skip the "for easy printing" -- it suggests the reader waste paper for something that can easily be viewed online.

Topic by BillyBuggy 8 years ago  |  last reply 8 years ago


A MODEL ON 'CONSERVATION OF NATURAL RESOURCES?

LIKE MAKING A MODEL WHICH SAVES RESOURCES LIKE WATER,SOIL,AIR,ETC. URGENT BY TODAY

Question by prasanth reddy 8 years ago  |  last reply 8 years ago


Help me make my apartment self-sufficient and green

Hello,I'm interested in making my apartment greener and more self sufficient than it already is. I want to do this for many reasons, but mostly to see how far I can take this. I'm sure a lot of this will depend on what I can put up with, but i'm looking for some ideas of things to implement. I'll follow Instructables if they exist about it and if they don't, I'll create some to document this.There are some restrictions: I am a renter and I don't own the place. I can make some changes, but I can't cut the walls out or replace appliances. I also can't put anything on the roof or outside of my apartment. I'm also very serious about conserving floorspace in my apartment and not accumulation a lot of junk. I need a bit of space to do my projects and have some sanity in this place (I live in NYC). This means no giant compost piles or what not in my living room.Here's my thoughts on things that I will need to work on:Measuring my consumption of thingsReduce energy useReduce energy wasteProduce some of my own power (Solar? I have a big window)Alternate lighting and heating methods?Making my own food to reduce the amount of waste packagingUsing local ingredientsjoining a CSA (just did that this week actually!)Growing some of my own foodReducing garbage and waste waterReusing things that I canCan you add to the list? Anything that you could help clarify? Anyone interested in taking the challenge with me? Thanks!

Topic by drocko 10 years ago  |  last reply 10 years ago


Robo-Goat Lives - At least I hope he Will

OK here goes. I work at zoo and I am a self taught geek, (mainly old school). I recently volunteered for a project mainly because I'm too stupid to know that it's not possible :~) Purpose of the program/project To - Engineer, Design and Build an Animatronic Robot Goat for: a Cheetah Conservation Fund in Kenya, Africa. This device will replicate a live goat in: size; appearance; movement; sound and smell (smell supplied by others), that can withstand the sever conditions of the desert, durable, possibly solar powered and easy to transport, setup and operate. Note: Up until this point real goats have been tried but they have not been too successful. They were either too stressed or they were stolen for by locals their meat. Objective(s): To lure Cheetahs into an area and enticement them into a cage trap with a simulated live goat (Robo-Goat), to provide a safe humane and ethical capture of wild cheetahs so that recently acquired state of the art GPS/Cellular tracking collars can be placed on them to help gather information to preserve this endangered animal. Analog Radio Tracking Collars have provided the only way to gather much of the information for many different wild animals. Radio Tracking style of the past has always been a difficult and time consuming endeavor, with old style tracking, large heavy radio collars that broadcast a ”beep” continuously, must be tracked with specialized hand-held radios and yagi antennas. All this to locate an animal being studied. Many times you would have to get close enough to disturb the animal just to find out where it is and then try to track it. Obviously not good “normal behavior” data gathering. The new GPS/Cellular systems track the animal in real time and send back data coordinates on the animals location, elevation, speed and direction as it travels. This GPS information is sent via cell towers, (yes they have them in Africa), to a computer that logs and graphs the movements. The research gathered through these efforts may provide the answers to saving these endangered animals. Project design/methods: #1. Establish parameters Record video & audio movements and sounds of normal & panicked goats Research and study movements and demonstrate what mechanical requirements will be necessary to replicate the minimum needed movements - [DONE]. {Raise and lower head; Look left and right; open/close mouth} Determine movement engine {I'm not sure here} {All of the movements are really axial in nature} {At first I was thinking motors but then there are end stops, control systems, ect. To deal with} {next I'm considering solenoids for the low energy requirements and simple full scale movements, except you cant control the speed} {But now I am becoming fixated on model airplane actuators for low weight, low noise and appendage like joints and accessories} {then I ran across "pager motors" and how they are small powerful and inexpensive some how I don't know where to begin} {can you tell this is all still up in the air?} Throw distance & Speed of movement - [DONE]. {Raise and lower head = 90 degrees of arc from base of neck = 5 seconds max} { Look left and right = 90 degrees of arc from left to right with return to normal center point half way = full movement l-r = 2 seconds max i hope} {open/close mouth = 45 degrees of arc from lower jaw = 1 second max} Repetition rate & pattern {random if possible} Determine audio requirements - [DONE]. {this is easy but requires playback trigger synchronized with mouth} The Cosmetics: Determine body and outer skin requirements – [Engineering]. {aluminum wire frame mesh} {foam sculpted head for low mass} {foam wrap suit for body & legs for low mass} {tyvek skin, airbrushed or penned for low mass} {stainless steel / nylon joints for low mass} DB level of normal and panicked goats - [DONE] {I have determined audio system requirements} Determine control system requirements {clueless at this point} Determine power requirements {I'm thinking deep cell marine battery and solar panels to retain charge autonomously} {amp hour rating for battery and solar charging circuit TBD after R&D; tests} {if solar is not feasible them battery exchange schedule TBD} #2 Acquire all electronic and mechanical parts #3 Create mechanicals Fabricate lightweight frame and skeleton structure. Assemble motion joints and motion engine Assemble and test motor functions Determine estimate of MTBF for spare parts, if any #4 Create & install sound system Edit custom audio media for both normal & panicked goats Utilize 12v Solid State Audio Playback Unit # 5 Create Control System #6 R&D; Testing Test charging and power circuit Final assembly #7 Final test Any help to provide suggestions to get me started on the type of engines would be great. tia

Topic by sharpfocus 8 years ago


Excessive Conservation Wearing Out [noun]...

So... While brushing my teeth - I first rinse my brush, turn the faucet on, brush, then rinse the sink/mouth. Yes, I turn the faucet off while brushing. And if you're counting - that's two on/off cycles per brushing...I've been playing with this tool: http://www1.eere.energy.gov/femp/procurement/eep_faucets_showerheads_calc.htmlAnd I pose an open question for discussion.. But first, my data/research...I'm estimating 3 minutes of use per day - 365 days/year. According to the tool... I use 2190 gallons per year. Lets say that's 5 uses per day (2 for teeth - 1 for bathroom use). The tool seems to estimate an 8.4 year service life - so that's a total of 18396 gallons of water over it's life as a faucet.So If I leave the water on while brushing - that's 3 on/off cycles per day.butIf I turn the water off while brushing - That's 5 on/off cycles per day (40% more cycles).Realistically, a faucet's wear comes from on/off cycles - each use bringing it closer to retirement. So 40% of 8.4 years is 3.4 years.Now... Leaving the faucet on an extra 4 minutes per day (2 minutes per brushing) consumes 2920 gallons of water per year.The difference over 8.4 years is: 30660-18396=12264 gallons. At about $4 per 1000 gallons - that difference is $49.06. BUT, the direct replacement for my faucet (as priced today in home depot to the exact model) is $75. So after 8.4 yearsFaucet remaining on will cost me:$49.06 + $75 = $124.06Faucet being turned off will cost me:$75 + $30(prorated cost of faucet for 3.4 years of wear on a new faucet) = $105Differences:$19.0612,264 gallons of waterThat is to say - due to extra wear on my faucet - it's only marginally more economical to turn my faucet off while brushing my teeth. If I wasn't me, and not able to DIY replace - it very well may be cost effective to leave it on given the cost of a hiring a handy man or plumber...Okay... Now that you've read the above... please discuss your thoughts. I am very much aware of the assumptions I have made (no need to point them out) - just looking for opinions :)UpdateLets turn this discussion on it's head now... As several have pointed out, conserving is more important - bonus as it's close to an economical wash in my fictitious scenario above (it's not 100% real and based on data from the link above and some hefty assumptions).My car uses .3 gallons of gasoline per hour at idle. Lets take a 100% city drive in heavy traffic (my drive yesterday). I was at a complete stop due to traffic lights or traffic for 20 seconds or more a total of 12 times to travel ~10 miles (yes, I freakin timed it). So that's a total of 4 minutes (wow, that worked out nice) of idle time. That time consumes 0.02 gallons of fuel costing me $0.06. If I were to make that commute 5 days a week, twice daily - that's a cost of:10.4 gallons of gasoline$31.2 worth of fuelSo, a new starter for my car costs $130. Typically the motors don't actually die - just the contacts. But lets assume I don't want to fiddle with that and just want to direct replace (corollary to valve washers :D).This means - using my starter an additional 24 times per day - it will take 4.2 years for the fuel savings to pay for a new starter. In 4.2 years - averaging 12,000 miles per year - I will have traveled 50400 miles.Okay - now lets consider the cost of fuel to restart - 24 times.... According to mechanical engineering magazine, a V6 engine used 5 seconds worth of idling gasoline to restart. So - redoing some math to compensate - that's a savings of7.8 gallons of gasoline per year$23.4 per yearTime to recoup 1 starter: 5.6 years (equating to 66000 miles)So, I'm having some problems finding data on starter life cycle - all I have is anecdotal evidence... *My personal car has 115K miles and is ~8 years old - and I've been doing this since I bought the car >2 years ago. *My last car was sold at 98K miles and this was done for a little less than 2 years (the car was 8/9 years old when sold).*My first car had unknown mileage (estimated around 150K), was 10 years old and the engine was killed at stoplights.*My parents own a conversion van (seldom used now) that is 12 years old, 120K miles - did not shut the engine (v8) down at traffic lights.None of the cars above have had their starter go.*Father had a truck that had it's starter replaced around 220K miles - unknown age. That car left us with a blown connecting rod around 300K milesBatteries... Yes, this does put more strain on your battery... I'll go more into that when I can find some better data (more than anecdotal :p)...But, that's to say... It's economically viable to turn off your engine at traffic lights... So much so, it's illegal to idle (over a certain period of time) at traffic lights in some countries...

Topic by trebuchet03 11 years ago  |  last reply 8 years ago


Rewiring my house to reduce electricity consumption

I am getting ready to rewire my house and want to do so in such a manner that a motion detector or timer shuts down most of the outlets in a room so that the phantom use of electricity or the abuse of same by teens is reduced (I am being realistic here). The Electrician thinks I am short a few bricks of a load so to speak. Lights he understands, plug load nada. I've seen something similar done in Europe when traveling where your hotel room powered down when you weren't in it and powered up with your key card in the slot when you were in it. I want to shut off all the power in the room when it is empty during periods of sleep except for one outlet which would power the clock/lamp and of course fire alarms. Help me out here.

Topic by crickenwood 10 years ago  |  last reply 10 years ago


Water-saving toilet hack

Toilets use fresh water, and lots of it.  Sure, you can buy a low-flow model, but you're still flushing with a (smaller) quantity of fresh, otherwise drinkable water. Gregorylavoie decided to get double use out of that water by hacking his toilet.  It's a neat, reversible modification: after you flush, you use the clean, incoming tank refill water for handwashing.  Your slightly soapy hand-wash runoff fills the tank, and is saved for the next flush.  It's a simple, ingenious way to save water with little to no effort. What do you think?  Would you try this mod on your toilet? This post has been sponsored by Pepsi. The Pepsi Refresh Project celebrates the people, businesses, and non-profits with ideas that will have a positive effect on our world.

Topic by canida 9 years ago  |  last reply 6 years ago


How can I practice to restore and preserve old artwork? Answered

I have recently acquired a small (6"x 8") original oil painting that has been a family heirloom for a while now. As far as I can tell through research and artist signature validation, this piece is more than likely about a hundred years old. It is still in good shape but over the years has developed slight cracking in the paint in certain places and is yellowing from sunlight and smoke exposure from improper protection. While I don't intend on fixing these issues myself without the proper training (which is one of the main causes of the devaluation and ruining of fine art), after searching the internet for any restoration services nearby wear I live, there was virtually nothing available. It was also very hard to find even a few locations that even advertised such a thing. So, I am curious after all this, how does one practice for these sort of skills, short of going to school to study such a thing? I would hope they don't let lay people practice on valuable works of art when they are learning.

Question by Asura-Valkyrie 7 years ago  |  last reply 7 years ago


Has anyone made a regular-to-footpedal sink conversion?

I have had this thought for some time but don't know plumbing or mechanical movement conversion well enough to effectively pull it off. What I've done so far is install a utility sink that hooks up to a veggiebed-mounted soakhose. I think it would be great for me to build it this way (more from scratch for problem-solving) and all at my limited level, but ideally, I think this will be one next logical step in water conservation if it can be integrated into a kitchen/bathroom sink (and shower). Coupled with an adapter to funnel graywater to storage or irrigation, it becomes one better. I agree flow-restricters are a good idea as well, but I feel this additionally adds to consumer value control and potential reuse. Any ideas on this one would be valuable! Thanks!

Question by Subconscionaut 10 years ago  |  last reply 9 years ago


i want to know how to make a modal on natural resource and their conservation?

I want to make a modal on natural resources and their conservation so please suggest me some ways how to make a modal on it

Question by shilpa vamanan 6 years ago  |  last reply 6 years ago


Perisistence Of Vision As A Replacement of Display Boards

Hello Guyz, Yesterday at night an idea got struck at my mind that can pov be used as a replacement for the huge display boards which are put on the large cities like NY,Las Vegas etc.  There will be a huge amount of energy conserved if we apply this principle.

Topic by abhirooprobotics 5 years ago  |  last reply 5 years ago


1 minute of labour...

Here is a rather interesting videos, made by the conservative party in the election.... :-P

Topic by Hiyadudez 8 years ago  |  last reply 8 years ago


How to store/ conserve unused Li-ion/ Li-po batteries?

Have several unused Li-ion and Li-po cells: My laptop battery, only used when working outdoors (is in summer). Half broken MP3 players, phones, a broken RC helicopter and some larger batteries.  Some might be useful one day in a future project. As I understand these cells slowly deteriorate even when not in use.  What is the best way to keep them in shape? Perhaps dry storage in a freezer? Charge them occasionally or have them uncharged?  Are button cells Li-ion cells?

Question by BobS 8 years ago  |  last reply 8 years ago


what is a "French drain"?

Was reviewing comments on rain barrel construction and someone mentioned "french drain"

Question by marycolletta 8 years ago  |  last reply 8 years ago


Is anyone familiar with an Euler's Disk? (physics, conservation of energy and angular momentum demonstration).

At this one site I haunt now and then, looking for new science toys and things to hack, I came across this little item called a Euler's Disk.  I am assuming at this point, that there is quite a bit of specificity in the way this needs to be made so that it works, thus the $25 price tag. Anyone have any information (not contained in the ad) on this?   It'd be most appreciated.  

Topic by Goodhart 9 years ago  |  last reply 8 months ago


Electrons and Photons? Answered

Under the right circumstance in a synchrotron for example, electrons accelerated to very high speeds can be made to give off photons. Apparently to preserve the laws of conservation of momentum and conservation of energy. i assume this means the photons in this case have mass to allow the electron to obey these laws so does this mean: 1. Electrons contain the photons 2. Electrons generate the photons 3. Photons are spontaneously generated by some other effect 4. The electrons are dragging photons along with them. Why do i have a feeling I am not going to understand the answer, if I could I probably wouldn't have asked the question!

Question by rickharris 7 years ago  |  last reply 7 years ago


pls help me with an working model tat can be made in one or two days.below are the given topics on which i need projects

1.climate change      (2)green energy  (3)conservation of energy..  (4)disaster management...  (5)health   (6)food security

Question by pikichops 7 years ago  |  last reply 7 years ago


Can you use an intermittent bursts of air to control the output RPM of a Tesla Turbine?

I've seen plenty of these projects using a constant stream of air to turn the turbine. Surely with the combination of rotational inertia and an intermittent jet of air a constant rotational force could be sustained whilst conserving the compressed air available?

Question by 10 years ago  |  last reply 9 years ago


Thin edge of the wedge in Texan education?

Any Texans out there? Did you know what (revisionist?) plans were afoot in your education system? Even as a panel of educators laid out a vision Wednesday for national standards for public schools, the Texas school board was going in a different direction, holding hearings on changes to its social studies curriculum that would portray conservatives in a more positive light, emphasize the role of Christianity in American history and include Republican political philosophies in textbooks. There have also been efforts among conservatives on the board to tweak the history of the civil rights movement. One amendment states that the movement created “unrealistic expectations of equal outcomes” among minorities. Another proposed change removes any reference to race, sex or religion in talking about how different groups have contributed to the national identity. - A greater emphasis on “the conservative resurgence of the 1980s and 1990s.” - A reduced scope for Latino history and culture. - Changes in specific terminology. Terms that the board’s conservative majority felt were ideologically loaded are being retired. (The new recommendations stress the need for favorable depictions of America’s economic superiority across the board.) - A more positive portrayal of Cold War anticommunism. Disgraced anticommunist crusader Joseph McCarthy, the Wisconsin senator censured by the Senate for his aggressive targeting of individual citizens and their civil liberties on the basis of their purported ties to the Communist Party, comes in for partial rehabilitation. - Language that qualifies the legacy of 1960s liberalism. Great Society programs such as Title IX—which provides for equal gender access to educational resources—and affirmative action, intended to remedy historic workplace discrimination against African-Americans, are said to have created adverse “unintended consequences” in the curriculum’s preferred language. - Thomas Jefferson no longer included among writers influencing the nation’s intellectual origins. Jefferson, a deist who helped pioneer the legal theory of the separation of church and state, is not a model founder in the board’s judgment. ... Heavy emphasis is also to be placed on the founding fathers having been guided by strict Christian beliefs. - Excision of recent third-party presidential candidates Ralph Nader (from the left) and Ross Perot (from the centrist Reform Party). - A recommendation to include country and western music among the nation’s important cultural movements. The popular black genre of hip-hop is being dropped from the same list. None of these proposals has met with final ratification from the board—that vote will come in May, after a prolonged period of public comment on the recommendations. Still, the conservatives clearly feel like the bulk of their work is done; after the 120-page draft was finalized last Friday, Republican board member Terri Leo declared that it was "world class" and "exceptional." First paragraphs from New York Times Headline paragraphs from Yahoo News It occurs to me that it may be appropriate for some members to have a rather forceful word with their elected representatives - at all levels - about the damage these proposals will cause in the American education system...

Topic by Kiteman 9 years ago  |  last reply 9 years ago


How can I wire a lamp to a digital clock?

I'm trying to make a clock/lamp to conserve outlet space. How can I wire the lamp to a digital clock? Is this even possible?  I want to take a digital clock and wire it to the lamp then mount the lamp and clock inside a fixture made of Plexiglas or wood.  This is sort of an experiment. 

Question by absaul 6 years ago  |  last reply 6 years ago


How / where do you store your kitchen cooling racks?

I'm looking for ideas for storing multiple sizes of cooling and broiling racks.  Ideally, they would be within easy reach (like not in the garage) but not in the way. So I'm asking the community in hopes that someone has found a non-tangling, space conserving, convenient method.  

Question by mole1 3 years ago  |  last reply 3 years ago


Does a 600w invertor draws more current even w/out using full capacity? Answered

IS it better to buy a lower Watt version if we are not going to use full capacity to conserve battery? SLA 7amp, 600w 110v inverter with a 9w light load = operation time? is it better to charge a netbook with a cigarette adapter say 9v VS an inverter and Netbooks Brick?

Question by celalboz 9 years ago  |  last reply 9 years ago


HHO and you!

Ok, so hho has become the new fad in the mpg race, but is it really effective?  Conservation of energy dictates that the energy required to separate water in to its base components is equal or greater to the energy released during its reconstitution.  The key to making HHO a viable source of additional fuel would be utilizing the waste heat from the engine to provide the electricity needed. TEG's + exhaust manifold + water = ? Discuss!

Topic by kretzlord 7 years ago  |  last reply 7 years ago


Cheap way to see Galapagos - Volunteer

I am assisting locals from Galapagos with creating a volunteer program that supports conserving the environment and allowing people to see the Galapagos in a more sustainable way.   We are really geared to people similar to Instructables that are crafty.  For those that dont know, Galapagos has a real problem with invasive species changing the natural habitat and threating the unique animals.  As a volunteer you will work between erradicating introduced plant species (i.e. getting out any rage with a machette), growing and transporting new native species (testing out how green your thumb is) and introducing green technologies to the Hacienda (we are already composting and using the energy produced by wind power).  Volunteers can stay for as little as one week or up to 3 months.   No particular skills are needed but we would love to have people that can help to introduce new green technologies. Check out more information on our website: http://www.galapagosesperanza.com They are wonderful people and its a wonderful place.  We hope you can assist!

Topic by galapagosesperanza 7 years ago  |  last reply 7 years ago


Does anyone know of a combination photocell & timer controller for a low voltage outdoor lighting project?

Looking for a combi photocell & timer light controller for use in solar powered outdoor trail lighting project that can turn on set of lights at dusk and off after 2-3 hours to conserve battery life. Preferably the switch/controller would be cheap, durable, and weatherproof.  Thanks for any info, Jake

Question by jbogar 7 years ago  |  last reply 3 years ago


Man turns himself into a puddle to protest climate change

In order to protest global climate change, this man from Red Cross Argentina turned himself into a puddle and handed out information on ways to protect the planet from imminent climate disaster such as reusing plastic bags, conserving water, and buying energy efficient cars and appliances. We just wonder how long it took him to get out of there.but you got to give him propsmain story

Topic by Chicken2209 10 years ago  |  last reply 10 years ago


Led Arcade Button?

Basically what I want to do is this   Or here if that doesn't show properly http://www.youtube.com/watch?v=oy9LjUzsZ10 But without a microcontroller. I need some guidance and direction for the circuit. I was looking to use a rgb led like this one http://www.paradisearcadeshop.com/en/button-leds/100-il-lumination-rgb-5vdc-led-0855742001002.html . It has a logic chip and resistor incorporated. Any suggestions on the circuit. This is going to illuminate a guitar killswitch and I want to conserve space that is why I do not want a controller. Thanks.

Question by bastafari 5 years ago  |  last reply 5 years ago


How to add energy to a spring system?

 I need to make a metronome out of a spring and mass system, one that has a mass on a vertical spring that goes up and down. Here's the catch: it needs to be accurate for more then 2 minutes, so I want to find a way to maybe hit the spring just a bit so that it will keep going. But, I don't have any access to a motor, or electrical source. Does anyone know how to do this? Like mechanically? I was thinking like how a clock conserves energy, but mine moves vertical.

Question by rlnbkseeberger 9 years ago  |  last reply 9 years ago


Artist 3D prints sculptures with human ashes

Dutch artist Wieke Somers has created a series of sculptures that are made with human ashes. She uses a 3D printer to assemble them, although there's no detail about the construction process in this article. Much more attention is given to the reasoning why in a classic artist statement: dutch design studio wieke somers does not want to discard the many benefits of technological innovation and its inherent mentality and the joy and will to create. instead she wants to make a statement about the current state of affairs in design and our conviction that we need a new view on what is necessary in the 21st century. her project 'consumer or conserve' evaluates this notion of a second-life. she considers, how human ashes can be reused by means of rapid prototyping or 3D printing, so that we may afford someone a 'second life' as a rocking chair, vacuum cleaner, perhaps even a toaster? would we become more attached to these objects if this was the case? would our willingness to pay more for a product increase if it is made from human tissue or ashes? I'd guess the answer is "no." Little bit creepy. Then again, Ed Headrick from Frisbee had his remains mixed in with a bunch of discs after he passed on so who knows? wieki somers: consume or conserve via inhabitat

Topic by fungus amungus 8 years ago  |  last reply 3 years ago


Adverising complaint

Hi, First I want to make it clear love this site. I have no complaints about the site or the instructables in it. My issue is the advertising. I understand that advertising pays for the site and I have no problem with that either. But I am currently getting bombarded with "Vote Conservative" ads. Not good. Advertising products is fine, but politics is a bit inappropriate. I figure that the ads are from a third-party advertising group so it's not the fault of instructables.com, but you might want to have a word with the people supplying the advertising since this sort of thing can really put people off. Especially when it's one-sided like this.

Topic by Jaguar_Pryde 3 years ago  |  last reply 3 years ago


LED Lite String Question?

So I have these cool LED Xmas lite strings which have 20 LEDs and run off of 3xAA batteries. Within the battery pack, where the power switch is, is a single resistor, 5.1 ohms (green / brown / gold / gold). I want to splice on another length of 20 LEDs to the existing set but would like to run all 40 off of the original 3xAA battery configuration. Do I just divide the resistor rating in half since I doubled the load (work being done) ? The project needs to conserve space, which is why I'm not using both battery packs.

Question by stagebuilder 9 years ago


Instructables image quality

Am I just imagining it, or did Instructables' thumbnail and preview images used to be much higher quality than they are now? Personally, I'm a fan of PNGs for their lossless compression, but I'm fine with lossy formats like JPEG as long as the quality is high enough that there isn't blatant distortion all over. But when I look at thumbnails and preview pictures on instructables now, I can't help but notice how crappy they look with all the distortion. My question is whether the decision to use low quality thumbs/previews was made in order to conserve disk space, reduce bandwidth, or improve load times?

Topic by burzvingion 11 years ago  |  last reply 11 years ago


CLEAR FILM that is archival, pigment inkjet compatible, and in of itself can be a final product? Is there such a thing?

Problem: I've been calling art stores as well as photography stores, paper stores, film manufacturers, printer companies -- nobody seems to know if there is such a thing as printing onto clear plastic film as a final product. Everyone says their products are meant for transferring or negatives etc. (I tried printing on non-coated Mylar D, and the ink just beads off.) goal: What I have been creating are art pieces on clear transfer film and selling them. I print on them, I paint on them, I apply reflective & dichroic materials on them, and layer them on top of each other; I manipulate the art pieces in every interesting way I possibly can. My collectors and potential clients want to be assured that my pieces will have a long lasting quality to them. I want to be able to give all of the correct information rather than "I don't know". my materials: I use a canon ipf8400 with archival fine art pigment inks. I just need a clear film that is also archival. Or something as close as possible to being the most durable, long lasting material available that is inkjet compatible. There has to be something out there? Or at least a protective clear spray or finish? I can't be the only one interested in creating artwork with transparent qualities? I have been using transfer film, 4ml thick. Does anyone have any tips at all to help me think in the right direction?  question: Is there such a thing as a Clear Film that is archival, pigment inkjet compatible, and in of itself can be a final product? Or what is the closest I can possibly get to that?

Question by LindsayR3 3 years ago  |  last reply 1 year ago


What's your favorite piece of cooking hardware?

Just wondering if anybody out there has one, "couldn't live without" piece of cooking hardware. A favorite gadget or tool that you just couldn't live without. Mine is actually my cast iron skillet I got for my 20th birthday along with a copy of Alton Brown's "I'm Just Here for the Food". I swear I have cooked pretty much every single kind of dish, from breakfast to dessert. I use it at least 5 times a week, and that would probably be a conservative estimate. Anyway, I'd love to hear what kitchen treasures anybody has out there.

Topic by mrrentalshoes 9 years ago  |  last reply 9 years ago


New DIY Green Blog

Hey everyone. Tap33 and I started a new DIY Green Blog. You can find it here. Basically, we're finding cool DIY projects on the internet about going green and posting them.If anyone wanted their Instructable that related to "Going Green" featured on the site you can leave a comment here, PM Tap33 or me, or contact us at the Contact Us section of the Blog. We know that there are a lot of great projects here so please, tell us if you want it featured on the page. Also, does anyone have any ideas for new "Green" projects?

Topic by Gjdj3 10 years ago  |  last reply 10 years ago


IOT Pollution monitoring HELP!?

Im torn between the two- Should I used Pi or Arduino for outdoor pollution monitoring? I have roughly a budget of $120 USD per node.  Can I use both of them together? - If pi. What do you do about battery conservation? Pushing data to a webpage recomendations? Uploading data? What sensors should I use? Ive seen someone trying to sell a single CO2 sensor for $50 USD?!? CO2, NO, CO, NO2 sensor suggestions? Ive been looking at grove Some will be battery powered. others by the mains. im going to try 3D print a case for weatherproofing.

Topic by LukeM5 2 years ago


Recoil simulation! Gas single action air cylinder or extended solenoid? Answered

OK, final question for this project! You guys on the other answer topics gave been a great help even if I haven't had time to reply yet! One half sorted onto the other. I have a tube with a 25mm diameter about 20cm long ( I could put a smaller pipe inside this and extend it at least another 20cm) I need recoil. Not super realistic, but as heavy as possible. Budget is about 40 pounds. (Money) My current ideas include either a 350g metal 20mm diameter by 10cm bar and a spring, being moved by a 250g solenoid with 10mm stroke, I would replace the metal solenoid bar (thing inside soldnoid) with a longer one, this will encrease stroke. Even if this did work there would be little recoil, though it is cheap and very easy. Power is a very short 12v pulse. The alternative idea is the pneumatic one, I don't really want to do this asi need to conserve my air supply for the other part of this project. It's effectively a solenoid valve (12v pulse) and an air cylinder (homemade to conserve price) which is attached to that weight aforementioned. Power is 6bar. This should provide significant recoil but is expensive, difficult and wastes large amounts of gas. is there a better way? Is there an electronic way that could avoid gas but still have heavy recoil and use my 12v pulse? Even if it is out of my budget, it'd be great to know. This is to simulate a backwards recoil as heavy as possible. Final question (unless something goes wrong) I promise!  Thanks.

Question by Digital Flame 3 years ago  |  last reply 3 years ago


I am new to paintball and I can rent any paintball gun for free on my birthday. Which one should I get? Answered

 I have never played paintball and I love to snipe in video games :) but IDK if I have good accuracy in real life.  This would conserve bullets.  I also have a choice of a full-auto.  This would waste bullets and I hate "Spraying and Praying", but accuracy wouldn't matter.  I am confused!

Question by garrett10 9 years ago  |  last reply 8 years ago


Integrating Highschool Sciences

Irene Duke, Kate Hoff, Lyndsay Carlisle and myself are participating in the MIT course 11.124, _Introduction to Teaching and Learning Science and Mathematics_. We have a variety of teaching interests: Irene hopes to teach chemistry, Kate to teach Physics, myself Physics or Mathematics and Lyndsay hopes to teach social justice / political history. Provided Make magazines as inspiration, we were tasked to design a joint activity, merging four high school classes of these topics for a period of weeks or months. We developed the ideas described in this first entry over the course of a class period. Hopefully, we'll take the time to expand each step into an instructable, possibly including trials by fire teaching 8th-11th graders. The material is structured by conservation of energy and resources, inspired by the articles of Tim Andersen. The final demonstration we envision motivates the particular material we wanted from each field. A bicycle wheel is drives an alternator transforming mechanical energy into electrical. The electrical energy is used to run a electrolysis process, rendering separate measurable quantities of Hydrogen and Oxygen. The Hydrogen and Oxygen are then combusted for the students. The amount of mechanical energy can be measured, as can the electrical. The binding energy of H_2O can be used to determine the chemical potential energy rendered. Finally, the combustion both demonstrates the energy's new form, and the difficulties in storing energy. The difference between power and energy underlies all of these experiments. Conservation of linear momentumn should be a familiar topic with the students. Conservation of angular momentumn can easily be introduced at this point, demonstrated with the bicycle and a fly wheel. Chaning the orientation of the wheel can be exteremely difficult. For the chemical portion of the experiment, stoicheometry should be familiar to establish the link between the amount of gas generated and the energy invested. The most appropriate mathemetical tools are statistical. Sampling, linear regression and averaging would prove useful throughout the experiments. Global economic relationships leading up from the colonial period would perhaps be the most applicable topic form history or the social sciences. Though not a technical detail, an important aspect of executing such an idea involves the actual deployment of resources. Students could, for example be broken up by their topic of interest, whether it be the physical, chemical or social aspects of the project. Next, new groups would be formed with one or two members from each subject area. These groups could then attempt to execute the design from the first slide, or one which is similar. Throughout, the students will present their thoughts or understanding to the teacher. This design project should perhaps be phrased as simply turning mechanical energy into hydrogen. Students with social scientific background might be responsible for estimating the costs of the implementation in different settings, and that would be used to drive a larger scale version. So, before getting started on building and documenting this project, do people have suggestions? What worked to combine the physical sciences for you? What might have worked?

Topic by mmt 12 years ago  |  last reply 11 years ago


"Hello world"

I appear to be tweeting. Unfortunately, I was beaten to plain old "Kiteman" by some Batman geek, so I am tweeting as KitemanX. Don't expect a constant stream of information, though, since I don't own a smartphone. Later... Dang, I've gained some strange followers - sexy Hallowe'en costumes, protein drinks for golfers, storage in Long Island, and what appears to be a conservative Floridian lobbying group (I don't dress sexy, I hate golf, I live in the UK and I'm randomly liberal). Update: I now have a number of cool followers, including some Instructablers, but I've also gained a random dentist and a Thai tourism company (not to mention the large number of NSFW spammers I've had to block...). Who's *your* weirdest follower?  Or your coolest?

Topic by Kiteman 7 years ago  |  last reply 7 years ago


What can we learn from those Amazing old Sharks ?

Currently a Greenland shark (Somniosus microcephalus) is good for 400 year lifetime. I would do an annual harbor swim of port Nuuk and consume Hákarl  (cured shark)  followed by a jigger of Brennivín known as (Black_Death) for just another 100 years added to my life. Any ideas of a better method will be worthy of support and consideration. "Cold can also activate antiaging genes that help an animal better fold proteins, get rid of DNA-damaging molecules, and even fight off infections more effectively, extending life span. The cold-activated molecules “are evolutionarily conserved” across the animal kingdom, and thus these pathways very likely exist in us and these sharks too"

Question by iceng 2 years ago  |  last reply 2 years ago


New knex machine gun

I've just had a really good idea, First make a shotgun, Preferably J5 barracade shotgun (I think it's called that) Mainly because that's the gun I built and got the idea from, Right when you've built the shot gun on the pump add a motor to pull it back, when it's pulled right back make it let go, like the rack and pinion. Now if you pull the trigger, it will fire, but if you take your finger of the trigger then it won't fire. This way unlike other machine guns I've seen where you put the motor on and you can't stop it unless you turn off the motor. This way will help conserve your bullets, also if you use the barricade shotgun, you will have to make a magazine on it, because it uses shells.

Topic by CrazyCHRIS!! 10 years ago  |  last reply 10 years ago


How to create 120 VAC to 90 VDC Power Supply?

I need to create a 90 Volt DC Power Supply using a capacity, toroid and bridge rectifier. I know that with a toroid you have a primary (input) voltage and then you'll conserve power but have a different secondary (output) voltage. I know that if you put say 120 VAC in the primary, the outputs might be, for example, 50 Volts out, which are also AC. I want the voltage to be DC, so I know that I need a bridge rectifier that will boost the voltage by 1.41 because of the AC to DC conversion. However, you also need a big fat capacitor, and I have no idea how to size and select this. Help?

Question by Matt Adams 9 years ago  |  last reply 2 years ago


How can I attach El wire to a PIC using an accelerometer as a switch?

I would like to use a PIC that would turn on the EL wire only when it is dark out via a small photocell. I would also like to incorporate an accelerometer that would detect when the person is walking or running (it is to go on shoes) as well as fade in and out. To turn it off to conserve battery power, I would like to incorporate a small switch so that when the person is home he can turn it off. Most of all, I would like to use 3 volts with a lithium ion cell or two AG13 batteries. I have wanted to use a CMOS 555 but it would make the circuit very complex very quickly which would make the circuit heavy and very uncomfortable to wear.

Question by blinkyblinky 7 years ago  |  last reply 7 years ago


He who says there's no such thing as global warming.

A friend of mine today firmly told me that there's no global warming and we should all stop trying to struggle improve efficiency (and then as an afterthought added "especially with policies, and liberalness and the such). It was a dumb inconsiderate reply but non the less, I snapped at him. I told him that we should just let ourselves cut down all the trees and pollute our atmosphere so much that marathon running would become a dangerous sport. He looked at me sheepishly and said something to the effect of well you shoulden't worry so much and Al Gore is a nutcase. Typical conservative catholic response. The point of telling you this story was to encourage you to say what you think in the comments section, and to inspire you to create ways to make us (the race of polluters) better. So go on, debate it up!

Topic by DELETED_craz meanman 11 years ago  |  last reply 8 years ago


Ways to make a crappy low-flow showerhead suck less OR slaying prehistoric plumber's putty?

Moved into a new flat and they're into water conservation. Great. Has a low flow showerhead. Fine. Except that it's got the worst design known to mankind with hideously low water pressure and an unadjustable spray that conveniently directs the water everywhere but you. The problem is that this craptastic showerhead is cemented to the pipe with what appears to be fossilized plumber's putty. I can't cut the pipe, as the internet suggests, because this is an apartment and they will rain brimstone and damage fees down upon me. So, the question: 1. How do you get rid of seriously ancient and hardened plumber's putty? 2. If you can't, how might you make an attachment to go over a showerhead that could improve water pressure or at least improve the direction of the spray without decreasing water pressure?

Question by TheJenx 6 years ago  |  last reply 6 years ago


UPS external battery setup?

 I have a APC BACKUPS 500 with a dead battery, it can supply up to 300 watts continuously. However, at full tilt my computer can use up to 1000watts and the monitor uses about 150. With standard use my computer uses around 400watts or so. Would it be possible to use 2 UPS both wired in parralel to a single deep cycle lead acid battery. Would this work? The thing I'm worried about is wouldn't both UPSes try to charge the battery at the same t ime, and would that be ok? Red is positive and blue is negative in the picture. I would hopefully get around 1 hour of backup. Also, is there any way to make my computer go into energy conservation mode when the power goes out? I have a 2008 8 core mac pro.

Question by snowluck2345 8 years ago  |  last reply 8 years ago


I, Skunkbait, am a Moron!

Ok, I'm not really a big "chat guy". Occasionally I have to look up acronyms to know what you kids are saying. I know LOL, WTF, STFU, and IMHO, but a few others just go over my head. So today I looked up FTW. You have to understand, that even though I am a pretty conservative Christian, I'm hardly "sheltered". Basically, I come from a biker background, and amoung us folks FTW means.... Well, you know. ANyway, When I saw Adrian Monk (usually such a good girl) use the acronym FTW the other day, I was dissapointed with her. I thought she needed her mouth....uh keyboard washed out with soap! ANyway, I looked it up and now I know better. Sorry I ever doubted your squeaky clean image Adrian!

Topic by skunkbait 10 years ago  |  last reply 10 years ago