Is this a good set up for a series/parallel configuration? when I test it with a multimeter the voltage was around 2.5 v each cell produces 3v@40ma. so something is wrong here.
Question by dominick.j.pezza | last reply
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
Topic by Jester_boy2 | last reply
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!
Topic by Bran | last reply
I recently take an old laptop battery a part and found 3 x "packs" of 3 x 18650 cells.I disconnected each pack and i was wondering,can i charge "the pack" using a TP4056 charger?(the charging current is 1A)l;(I want to make a portable console,so i need rechargeble batteries)This is the charger that i orderd:https://www.optimusdigital.ro/ro/electronica-de-pu...
Question by Ferferite | last reply
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?
Topic by Tool Using Animal | last reply
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.
Topic by etimm | last reply
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.
Topic by brainwash | last reply
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
Topic by avatardub | last reply
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.
Topic by valmont325 | last reply
I'm making a hydrogen motorbike that runs this kind of motor ===>http://www.ebay.com/itm/ME0709-Brush-Type-Permanent-Magnet-Motor-PMDC-24-72V-DC-Etek-R-19HP-pk-/250954809815?pt=LH_DefaultDomain_0&hash;=item3a6e1281d7 However, all i can find are " make your own HHO" fuel cells (which I'm pretty sure isn't what a fuel cell does but I might be wrong on that). Where can I find an actual hydrogen fuel cell that can power this motor plus lighting (and a few things like an arduino) for the motorcycle. Thanks a bunch!
Question by Sun Gear | last reply
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.
Topic by popit | last reply
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.
Topic by seanmcdaneld | last reply
A couple of questions: 1) Does anybody know where to get cheap platinum wire (or platinum coated wire) 2) Does AC work better than DC for electrolysis because neither of the poles will corrode. 3) fuel cells produce around 2 volts, right? 4) Is there a cheaper alternative than platinum for converting hydrogen (and does it need the oxygen?) into water and electricity?
Topic by guyfrom7up | last reply
Hi Guys! A few weeks ago I found an auction on ebay, bid, and won myself some big old pack of solar cells. Now these panels are wafer thin, no coating or covering. Additionally, I need to put the wire collecting ribbons on myself. The only problem with these is that they are incredibly fragile. What can I coat them with to protect them? Is there any spray or acrylic or resin that you use to protect them? Thanks
Question by transistorguy | last reply
Well, my mom knew (somehow) that I needed some button cell batteries for some experiments. (Mwuahaha)Well, she went and got me some, but I don't know the power for any of these.Can anybody tell me?List:AG1AG3AG4AG10AG12AG13And if this helps, they have numbers next to them saying: (in order of above)364392377389386357Please help, thanks!
Topic by GorillazMiko | last reply
Question about flashing red LED: I have a simple circuit--switch, battery, resistor, LED. Today, when I clicked the switch on, the LED came to life very slowly, as of it were fading in. I have never seen this behavior before. Is it the battery? (3V, 2032 coin cell and 100ohm resistor). Thanks.
Topic by yongeeks | last reply
So, y'know how sometimes you might feel like sharing your music with friends, but you dont want to share you headphones? The solution would be to carry speakers, but usually they're sort of bulky and they wont fit in your pockets very well. So, what about cell phones? even some that are maybe a few years old are still smaller then some speakers. Everyone knows taht cell phones can be Really loud, so what if we somehow add a cable to attach to an audio device, and switch around some things inside, and use the dead phone as speakers?! I would try and do this, but i have no idea how, so this is just an idea for you peoples to think about.!
Topic by Sadam and Osama | last reply
Lets say I have a solar panel that gives off 5 volts at 30mA. if I were to put a ten ohm resistor in series with it would There be basically no effect because a 10ohm resistor woulkd limit it to half an amp, which is way more. Or does the solar panel act like ~ 167 ohm resistor, and adding a ten ohm resistor will limit it to 28mA?
Topic by guyfrom7up | last reply
Well apparently my mother dropped my cellphone, now when you turn it on, the screen lights up, but it's blank, it vibrates when I turn it on because it was on vibrate before (startup sound). But it won't do anything else, I tried changing the ringer, hitting buttons, and it didn't make any sounds. Display cable popped out? Any ideas? -Punk
Topic by Punkguyta | last reply
I am trying to make a somewhat portable solar panel with (3) 3 1/4" x 6" solar cells mounted on a durable fabric, but what I'm wondering is how to mount them. I am thinking of using glass super glue to mount the cells on or sandwitched between two peices of glass and having that sit in a plastic frame to be riveted on the fabric. what I want and haven't been able to find is a low profile license plate type plastic frame that would fit the glass perfectly. I only want to spend around $1 per frame, so custom isn't going to cut it. Does anyone have an idea of a plastic or even aluminum frame that would fit these specifications? Thanks!
Topic by tinstructable | last reply
I found a watch phone(s) on eBay that has TXT, GSM, and WAP capabilities for a good price. Anyways I need to know what provider I can use it with. I want to at least have the TXT and GSM. The WAP would be cool too! Thanks, joespicnictables http://www.ebay.com/itm/New-high-cost-performance-Wrist-Watch-Cell-Phone-MP4-/230675500795?pt=Cell_Phones&hash;=item35b554cefb#ht_6074wt_932
Question by joespicnictables | last reply
I've always thought that it would be cool to have more than one cell device on my specific account. (no, not like a family sharing plan). Let's say, I want to keep a spare phone in my glove box, on a trickle charger, so that I always have a working phone in an emergency. Let's say you use your cell phone a lot.. Instead of swapping out exhausted batteries, what if you had a second phone on the charger that you can switch to whenever needed. Is it possible to clone your telephone, so that you can have a spare device. If you are paying for the service, and you can only use one of the phones at a specific time, why would the phone company care? I have 6 old phones from which I upgraded. They all work fine, and could make great spares if there was a way of programming them to work on my account. Can the MAC address / serial number be cloned to an old phone? J.
Topic by John_the_Builder | last reply
I need help with a project I am working on. I need A list of parts and a simple diagram for a CDS circuit cell that will turn on a LED(s) when there is no light. It is a circuit that will be powered by a 9 volt battery, and will power 2 5mm LEDs. If you can help me, I will give you credit in the instructable.
Topic by XOIIO | last reply
Hey everyone, I'm going to be getting a cell phone this week, but its my first one and I have no clue whats good out there. I already know that I'll be using Verizon, so I wanted to see what everyone would recommend thats available on there network. I would like a flip phone with a decent camera and text/pic messaging capabilities, but beyond that I'm not too concerned about extra features. And I refuse to get the Razr, so don't even suggest it.Here is a list of verizon's phones:VerizonThanks!
Topic by Andrew546 | last reply
I was playing around with some of my 1/8in. NeFeBr (or is it NeBrFe?) magnets leftover from the challenge. Was using them to find screws on my flip phone. I noticed that when I put it at the "joint" of the two halves, the screen went dark. Turns out it thought I shut my phone. This was just a little odd tidbit that I wanted to share, that has potental. But, it isn't an instructable, so I just posted it.
Topic by zachninme | last reply
Check it out: I'm a major Android fan. Sure, Mac makes some incredible machines, but I just hate how shut off they are. That's why I love Android. You're able to change the battery if you, you can expand your memory, you can even make your own apps without hoping to gain someone's permission. However, the one thing that iPhones have over Android phones is the fact that they have the ability to be placed on a dock. My question is, why can't Android phones do this? Now, instead of making docks for these phones, maybe it's possible to use the ones for iPhones that are already there. What if there was a little plastic piece that snaps on to the iPhone dock and has a mini or micro USB male end on the other side? Of course, there are all kinds of sizes and shapes to Android phones, but I'm sure once this piece is perfected, one could make different shaped ones for different phones to fit neatly. Most of you are much smarter than me (or maybe have more ambition), so I'm sure you can figure out how to do this sooner than I can. If you have and idea on how to make this work, good luck and let me know how it turns out. P.S. If you make this and market it, be sure to credit me for the idea, yeah? ;)
Topic by SamSkellington | last reply
I have a 5s4p battery pack. The cells are 3.7 nominal voltage lithium ion cells. In a serial configuration it is 18 volts nominal. If I wire it in parallel it is in a 1s20p configuration and 3.7 volts nominal. I had this awesome idea to use switches to change the configuration from 5s4p to 1s20p. I want to do this because then I could charge whole pack with a 3.7 volt charger. Better yet, I would not a balance charger. Once I got to trying to design the switch configuration I was amazed at how complex it would have to be. The only way I can think of at the moment is to use 4 single throw single pull switches to isolate the cells and then use 5 double pole single throw switches to connect all the pos and negs together. Does anyone out there know how to make a circuit which could work with with one circuit board and one switch? It could switch between 18 volts serial to 3.7 volt parallel? Thanks
Question by Noblenutria | last reply
Hey, As someone who wants to try micropropagation I would like to know how long plant cells can live when cut from the main tissue that they're found? And if the liquid that they're suspended in and the nutrients really make the difference can I be advised as to what solution to make up for transport? Any help would be great, Thanks, Tom
Question by thomas9666 | last reply
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?
Topic by kefflon | last reply
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
Topic by cShellPro | last reply
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.
Topic by kelseymh | last reply
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
Topic by guyfrom7up | last reply
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?
Topic by thelastonekills | last reply