Peltier Cells?

In the current make magazine issue #15 There is a project called the Seebeck Generator. I was wondering about the use of Peltier Cells. Can someone elaborate as to how they function? I mean can you get them in different sizes? Would different sizes effect the power output? If I took like 50 of them and somehow combined them could I get a higher yield? What if you used it in combination with something like Hydrogen? Ideally Hydrogen burns hot and if I had a large version of the Peltier Cell Could I use it to get a real power output? Possibly enough to power an electronic motor? Just some random thoughts the magazine sparked. Thanks, Jester

Posted by Jester_boy2 9 years ago


Solar cells and the environment

Question about solar cells. Since solar panels are encased in glass or polycarbonate, does exposure to the elements degrade solar cells? And if so, in what fashion? Corrosion of the traces? water infiltration? etc. etc? Or is it a matter of the fragility of the cells?

Posted by Tool Using Animal 8 years ago


Increase voltage in my 12v Ryobi drill?

Hi Guys! I have a Ryobi 12 v power drill that is really tired. I don't wanna buy a new battery because after a few month it got so weak. I read the inspiring post Hot Rodding a Power Drill Battery by archer6817 and would love to try it. But I have a question.  Can I increase the voltage if I put in new cells,  like 14 or 18 volt?

Posted by kefflon 1 year ago


Live mice grown from stem cells (iPS)

According to a news article on Nature's Web site, two different research groups have grown live mouse clones using "induced pluripotent stem cells" (iPS). These are initially normal adult cells which are treated such that they revert to the same state as embryonic cells.

Posted by kelseymh 9 years ago


How to make solar cells?

Hi All, Instructables is a great site which offers lots of handy tutorials. While searching for ways to make solar panels I came across many tutorials that explain how to make a solar panel from solar cells. I'm looking for a tutorial on how to make these solar cells at home as I don't want to purchase them. Anybody has an idea? Thank you. Ciao Frank

Posted by cShellPro 6 years ago


what button cells can you recharge?/ super capacitor help

What button cells can you recharge? For example, some are in calculators wtih solar panels, do they need a complex charging circuit? I'm building a bunch of tiny circuits and I don't want to keep on changing the battery. edit, I now need help with super capacitors

Posted by guyfrom7up 10 years ago


photovoltaic CIGS solar cells DIY ..

Hello, I have been reading this document lately: CIS(CIGS) thin films prepared for solar cells by one-step electrodeposition in alcohol solution www.iop.org/EJ/abstract/1742-6596/152/1/012074/ and I have been wondering ever since if such procedure might be handled by a DIYer ,without any lab machine (as Graetzel cells are made) . Non toxic materials handled and high efficiency levels would be plus.

Posted by gabdab 8 years ago


AAA cell vs. D cell

This question has been bugging me for a while now. What's the difference between a 1.5v AAA cell battery and a 1.5v D cell battery? Why is the D cell bigger? Is that just for weight, or does have more resistance, like it lasts longer? Why is one better? Thanks!

Posted by Bran 11 years ago


transfer cell phone messages to other cell phone

A friend of mine once played her voice mail messages from her phone to mine while we were talking on the cells. Does anyone know how to do that? Please help!!! Thanks

Posted by happy2baliven05 10 years ago


cell phone

Does anybody know if i could hook a cell phone up to my regular phone line at my house and how?

Posted by fishing4life13 11 years ago


how to make working of a dead cell

Hi, Friends this is swetha, i am using nokia n73, i made a mistake for that my cell was completly dead, i shown that in nokia care but no use. Is there any possible to make that dead cell phone to rework again.

Posted by swetha_k_5818 4 years ago


Making a cell phone!

Here's a link: (I made this a while back, and I didn't know there were forums back then) https://www.instructables.com/id/Can-you-help-me-build-a-cell-phone/?comments=all#CAW7ML6G6MPGEQP Thanks for any help/ideas!

Posted by Night910 7 years ago


Pocket Hydrogen Fuel Cell

Horizon Fuel Cell Technologies has released a pocket sized refillable hydrogen fuel cell! It's designed to charge small devices on the go.  http://www.horizonfuelcell.com/store/minipak.htm $99? I think I have a birthday coming up... 

Posted by Culturespy 8 years ago


biology maximum cell size

What stops a cell from being extremly large? inparticular in prokaryotic cells, like algae, where it is the cell and is not part of something bigger like a tissue or organ. also in the way of darwins theroy of evolution, does any one know how much it appiles to algae, either all or some strains and how much they addapt and how quickly?

Posted by thelastonekills 7 years ago


Solar Cells at home?

Anyone know a way to make your own solar cells? Saw 50 cells for about $250 US on Ebay and wondered if thats as cheap as they get. Not that this didn't seem pretty cheap, but always looking for cool new processes.

Posted by bowakowa 11 years ago


Cell Phone Remote Control

Hi, Anybody want to control any desired gadget  ONLY through your cell phone from any part of the world? Check out this link: http://quazen.com/shopping/consumer-electronics/how-to-build-a-cell-phone-remote-control-at-home/

Posted by swagatam 8 years ago


betavoltaic cell anyone?

Has anyone built a betavoltaic cell? Tell us about it! I could imagine someone collecting the isotopes from old smoke detectors,painting them onto an old solar cell and making electricity in the dark. I'd try it myself if I wasn't such a lazy old fart.

Posted by etimm 9 years ago


Flashing a Sony Ericsson s710a cell phone.

Does any one know how to flash a Sony ericsson s710a cell phone; any help on this subject would be greatly appreciated, Thank you.

Posted by Looie_e 10 years ago


Tiny solar cells - UK supplier?

Solarbotics sell a tiny solar cell. A dollar each, but postage doubles the price.Does anybody know of a cheaper source, preferably in the UK?I have already googled, and failed.Alternatively, is it possible to cut or break up a normal solar cell and still use the fragments?

Posted by Kiteman 9 years ago


Cell phone radiation boosts brain cell activity in brand new study

Brain cells are impacted by cell phone radiation in accordance with a recent study. The study detected an increase in the metabolism of brain cells. Brain cells were affected in the part of the brain near the antenna of the mobile phone. Brain cells are definitely impacted by cell phone use, according to the research, however further research is needed to discover out if that's a bad thing. Source of article - Cell phone radiation increases brain cell activity in new study by MoneyBlogNewz. Cellular phone brain cell research first done The first research undertaken to examining how electromagnetic radiation from cell phones impacts brain cells was published in the Journal of the American Medical Association on Tues. The research focused on how cellular phone use affects normal brain cell function, known as glucose metabolism. The rate of glucose metabolism in brain cells was increased more than researchers were hoping with cell phone exposure. When it comes to brain activity, the way it's done is with cells creating energy. This is done with glucose. The way brain cells work is that it is produced as necessary. The glucose is produce whenever it is needed by the brain. It's unknown if it's bad or not, however it was found in the study that glucose metabolism amounts are increased artificially with a mobile phone. Further research needs to be done though. How mobile phones affect the brain With all the phone calls going on, cell phone radiation has concerned medical experts. They have worried about what it's doing. The outcomes of previous tests have been inconclusive. A connection with brain cancer was found in famous cellular phone radiation studies. The proof that brain cancer was actually brought on by mobile phones in cell phone users was not there though. There are other things scientists have tried to ling cell phone radiation to. Such things as cancer or dementia due to brain cell mutation are examples. The effect of cell phones on children's brains has been a particular concern because children have thinner skulls, the radiation penetrates deeper and their brain cells metabolize glucose faster. Try to choose speakerphone In a statement responding to the cellular phone brain cell research, the Wireless Association said scientific evidence proves that cell phones, used within limits established by the Federal Communications Commission, don't pose a public health risk. The way cellular phone radiation affects the brain is nevertheless unknown really. Until more research is done, experts suggest Bluetooth earpieces and speakerphone should be used as often as possible. Information from CNN cnn.com/2011/HEALTH/02/22/cell.phone.brain.activity/ Web MD webmd.com/brain/news/20110222/cell-phones-affect-brain-but-does-it-matter?page=2 Wall Street Journal online.wsj.com/article/SB10001424052748704071304576160652541652440.html

Posted by InigmaN 7 years ago


Opinions

Okay I need your guy's help, my upgrade for my cell phone is coming up in like a month and I'm stuck between these two phones, so comment and tell me which one you like best. http://www.t-mobile.com/shop/phones/Cell-Phone-Detail.aspx?cell-phone=Motorola-Cliq-Titanium http://www.t-mobile.com/shop/phones/Cell-Phone-Detail.aspx?cell-phone=Samsung-Gravity2-Deep-Ocean

Posted by bigdylan91 8 years ago


Where can i find the cheapest solar cells?

Im not sure if this belongs here but where can i find the cheapest 12v solar cells? Ive looked in ebay and only find them at 150+ dollars

Posted by ReCreate 9 years ago


ni-cad cell zapper

I have heard that unchargeable ni-cad cells can be rejuvenated by applying a short high-current spike thru them. does anyone have a device to do this? or just an idea on how it is done?

Posted by joe84 10 years ago


Rotary dialer in modern cell phone

I want to merge rotary dialer with a modern cell phone. Can anyone help me with this, please? Actually I have to convert rotary dialer's analog signals to cell phone's way of dialing -- key closing...

Posted by Blinchik 11 years ago


can a a cell phone be made into a walkie talkie?

I was thinking can a cell phone be modified into a walkie talkie ive got 4 or 5 old cell phones i know the power wattage is low but is there a way to retinker it into a walkie talkie? or a wireless intercom?

Posted by Ogrecycle 11 years ago


Plastic Solar Cell

Hi, here anybody did try to make plastic solar cell at home ? Eager to learn next-Gen science Here is some video on Plastic solar cell www.youtube.com/watch?v=akqu6g9mXZM www.youtube.com/watch?v=s3ZbuZvq_30

Posted by ruchitinfushion 3 years ago


(cell) phone can call into a speaker

Has anyone seen a solution where a (cell) phone can call into a speaker in a shop? Like have a phone that auto answers and connects to a loud speaker in a shop floor? Or another type of solution. thanks

Posted by gregdove 4 years ago


Pocket Watch Cell Phone

To be honest, i think it sounds like a good idea. the device would probably have to be about the diameter of an orange, but i bet having a pocketwatch that doubles as a cell phone would be a hit with steampunk lovers! anyone agree with this?

Posted by EngineerJakit 7 years ago


How do cell phone screen protectors affect touchscreen performance?

How do cell phone screen protectors affect touchscreen performance? 

Posted by Ch2112 1 year ago


Nano solar cells

Hey, does anyone has an instructable on how to make a nano crystalline solar cell? i am currently interested on doing it, but do not know exactly whereto make a good start, especially with the materials. So, can anyone help me out? Thank you very much.

Posted by brainwash 9 years ago


Use cell phones without cell phone service?

I'm over 50 and trying to learn how to hack and mod electronic devices. Perhaps this is a dumb question, but so what: I have an old Samsung camera phone that is no longer subscribed to a phone service. It's just a phone, without a smart card. Is there any way to use it as a digital camera, or address book, alarm clock anyway?

Posted by theglove 10 years ago


Solar Cell Phone Chargers

Solar Cell Phone Chargers Since we all walk many hours in the sun each day, does anyone have knowledge of a functional solar charger for phones or cameras?

Posted by weijing3333 3 years ago


Adapting loads cells from bathroom scales

I want to make some small slim pads to measure the pressure beneath several wraps of 6mm rope placed against the skin - don't ask ;-). My raw materials are the load cells and electronics from some electronic scales like these. They have 4 loads cells that look like this The problem is they are in those oval plastic boxes you can see at each corner of the scales so are too bulky. My question is how to repackage the load cells so they will still work but be thin and comfortable?

Posted by Esinem 5 years ago


cell phone flash

So i have this old broken cell phone , i think all of it works but its no longer connectable , the body and the screen . it has flash so i thought to somehow make a little flash that i could just flash around for fun , and maybe some other cool stuff with old phone ? thanks

Posted by avatardub 6 years ago


Cell Phone Jammer

I have alot of Cordless phones with the handsets and i have the bases, i have answering machines , regular phones.  Old cell phones....Is there components in there that i can make a cell phone jammer with?   Im teaching myself electronics by taking things apart,lol  but i still have trouble figuring out what parts are what.    Any help?   thanks.   Ps, i would love to make one with a altoid tin if possible.

Posted by valmont325 7 years ago


Can I connect a cell phone to an old touchtone landline phone?

I want to connect my cell phone to an old 70's touchtone landline phone. Can this be done. I know you can connect a reciever to a cell phone but I miss the old touchtone keypad. Any advice?

Posted by paperseal 10 years ago


Sony Ericsson w580i cell phone

I bought a Sony Ericsson w580i cell phone about a month ago. Are there any cool things that can be done with it, changed on it, or just some simple tips. I all ready have music and vids on it. its a good phone, and I love it.

Posted by Thelonelysandwitch 9 years ago


Replace just 1-2 bad li-on cells?

I've got a fairly new DeWalt 20V Lipo Battery pack that got a bit of water inside it's case, causing 1 of the 10 cells inside to go bad. Pertinent info: * Battery pack is configured as 5x2 (5 series stages of two parallel pairs each) * Other cells are in near-new condition. * OEM Factory battery exact matches are rare and quite overpriced.  (1500mah x 15A discharge rate @ $10-20 shipped.) * Due to improvement in battery tech, I can get batteries that outperform OEM in every spec for 30-40% of what the OEM costs (2500mah x 20A discharge rate @ $4-6 shipped.) * The battery pack is always charged on a cell-balancing charger. Assumptions:  (Correct me if I'm wrong here, especially on the 2nd one) * The partner cell to the dead one is now suspect, due to being undercharged (down to <.1V)  by it's dead partner. * I should be able to just replace the bad cell and it's partner with the higher spec'd batteries and it shouldn't be a problem Is this workable, or will having non-identical cells for 2 of the 10 cells cause problems?  (I'm totally fine with the pack only being as strong as the weakest link, and only getting OEM performance out of the replaced cells.) I'd rather not have to replace all 10 cells, but I'd rather do that than replace 2, and -then- have to replace all 10 because the combination didn't work.

Posted by SvdSinner 2 years ago


Re-Use, Individual Cells from 18V NiCad

Seems that with a bit of randomnity in mfging, some cells in an 18V battery might fail before others. With that in mind, I'm trying to re-use individual cells after a pack craps out.  Test 1  Battery pack from a "drill master" which I got for  ~$2 at a thrift store. Google informs that this is a harborfreight tool, so expectations are low.  Upon disassembly of the pack, 1 of the spot-weld connections between cells had broken.  Since I don't currently have a 1.5v source, I'm using a 3v  source to charge 2 cells in series. Only charging for a few minutes at a time. Currently, this 2 cell set will light a couple xmas lites for a few minutes after charging for a few min. I'm uncertain of the calibration of my v-meter, but it currently indicates 2.65v for these 2 cells. Depending upon the source, NiCads should max out at 1.45 to 1.65 v per cell. Test 2: Pending- Ryobi drill batteries I'm uncertain how to get a good read on the accuracy of my meter without a high-end meter to compare against. Suggestions? Hopefully, I can find a proper 1 cell nicad charging device.  Thoughts? concerns? insights?

Posted by Toga_Dan 3 years ago


Solar cells in series sum voltage and current?

I am very confused! I built a 10-cell panel (laid out on corrugated plastic for testing). They were rated at 1.8W and .5V. In the sun, putting the volt meter on a SINGLE cell yields about .55 V and 136mA. This is the same for every one I tested, on the panel and individual cells. What the heck? Shouldn't they be about 3.6A? So I soldered 10 in series and put the leads across the final terminals- sure enough I get about 5.5 volts! But I also get about .96A. And current is negative. WHAT THE HECK?! Am I understanding it wrong? I have to be. I thought putting cells in series adds voltage but current is going to be the same as whichever cell is producing the least. Somehow I'm going from .55V/ea to 5.5V/panel. and 136A/ea to .96A/panel. 10 cells. Should have had an 18W panel. Each cell should be giving me 3.6A. "This should be fairly simple" I thought.

Posted by Phoenix17 4 years ago


Easy spray/liquid *open cell* foam?

Hi all - new here  :)  I was trying to think of where I could ask this and I immediately thought of instructables.  Does anyone have any ideas where I could find a spray or liquid *open cell* foam?  It's easy to find cans of spray closed-cell foam these days, but I've never seen one for open cell foam.  I've done a lot of searching, and the only open foam cell solutions I find tend to be giant expensive things for insulating houses in bulk, nothing for small scale applications.  I'm looking to fill a bundle of relatively fine tubes (diameter TBD), which I want to act as a sponge on the inside, resisting allowing the liquid inside to drain out while still allowing for gas migration.  Hence closed cell is not an option.  Polyurethane is probably fine, although other materials may well be fine as well. Any ideas?

Posted by KarenP139 1 year ago


12-year-old designs advanced 3D solar cell

From Slashdot:12-year-old William Yuan's invention of a highly-efficient, three-dimensional nanotube solar cell for visible and ultraviolet light has won him an award and a $25,000 scholarship from the Davidson Institute for Talent Development. "Current solar cells are flat and can only absorb visible light" Yuan said. 'I came up with an innovative solar cell that absorbs both visible and UV light. My project focused on finding the optimum solar cell to further increase the light absorption and efficiency and design a nanotube for light-electricity conversion efficiency."Much about his young man is eerily similar to many participants here on Instuctables...SlashdotBeaverton Valley Times storyKatu.com story

Posted by gmoon 9 years ago


big telephone receiver for cell phone

Friends, I hate talking on the cell phone; it's too small, especially when I'm talking from home. I keep a land line so I can chat for hours on a regular sized telephone. However, I'm moving next week and won't be able to spring for a land line. Can anyone help me use an old-time big phone receiver with a cell phone? Blue tooth maybe? Or perhaps attach something to/around the cell phone that allows me to hold it between my head and shoulder and talk into a mouthpiece that's near my mouth? Thank you, evil geniuses, all... xo

Posted by rachydee 8 years ago


Cell phone battery

My friend gave me an old cell phone, with no battery. (No it does not have service). I don't know if it even works. It is a Motorola i860. Where the battery goes are four pins. How can I connect a AA, or AAA, etc battery to it to see if it works. The first time I tried it, it got real hot and then the battery smelled like it was burning. The second time it sparked. Is it even possible to do this? If it is, I need to know the voltage, polarity, and what pins to use.

Posted by popit 10 years ago


Cell Phone Repair?

Recently my girlfriends cell phone broke. The On/Off button still works, but none of the other buttons work. It still can receives phone calls, and text messages, but only one button works. The other day a couple of the other buttons worked briefly, but they went back to not working after a couple of minutes. I think its a problem in the phones wiring. Before I go opening up the cell phone, I was wondering if anyone has any advise or any experience working with cell phones, that might be helpful.

Posted by seanmcdaneld 11 years ago


microbial fuel cell instructable contest highest output put on a toilet system. Green energy power from composting

A microbial fuel cell instructable contest Could help be a think tank for highest output put on a toilet system. This could also work with Green energy power topics and instructables on composting.The fuel cell book on the for evil genius series has info on it. It also contains journal articles. http://www.microbialfuelcell.org/www/has how to and todo instructions on making ones...

Posted by josheeg 9 years ago


Using a computer fan to lift a solar cell

Hi! my boss told me to come up with a cheap replacement for a vacuum pump and since it's needed to lift only two solar cells at a time, I thought a fan could be used to create negative pressure. The cells are really light, but since I suck at physics/fluid dynamics, I thought I'd ask if I'm way off base and if I am, is there any solution to this problem. I attached a picture of the current state of the idea. 

Posted by TashaDax 6 years ago


Use for dead cell phones

Is there any use at all for a discontinued cell phone? If there is please let me know. I have 3 or 4 dead cell phones and I don't know what to do.

Posted by BEAST14 9 years ago


problem using instructables on tablet and cell phone

 Hi ,        Im having a problem using the instructables app and web page on my cell and tablet. Once i sign in  and go to the top right corner and click my picture for the drop down to go to my page of instructables or anything actually , It clicks on the   Tech shop tab instead like it by passes or doesnt see  the drop down choices ?

Posted by coolbeansbaby68 5 years ago


Where can I find good 18650 cells?

I want to build a custom Li-Ion pack using the 18650 cells. But, when I go to look some up online, all that really turns up are the knockoff brands in which they claim a stupidly crazy high mAh rating. So.... where can I get some good cells?

Posted by Dashing Rainbow Dash 1 year ago