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.
Asked by dominick.j.pezza 3 years ago
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...
Asked by AnghelutaA 3 months ago
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
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
Asked by Noblenutria 6 years ago
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
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
Asked by thomas9666 4 years ago
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
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 8 years ago
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? 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
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
I’m working on a project were I have to be able to adjust the voltage of my output by 3.7 volt increments. Example: 12 18650 batteries hooked up in series and have the voltage change from 44.4 to 22.2 to 11.1 Essential I’m trying to go from a 12s to a 3s4p or 4p3s cell configuration.
Asked by prostructables 2 years ago
Hello, I have been looking more and more into solar and wind power generation as well as ways to store the power. I am still in the planning stages and have not yet tested anything. What I usually see in almost every green power storage guide is to use deep cycle batteries mostly of the types designed for solar, golf carts, etc. That would work fine but they are always rather expensive atleast any I have found online (if you know a cheaper source I would love to hear about it). So my question is this could I just buy a bulk quantity of AA NiMH (the new ones without memory) or AA Lithium ion batteries and set them up in series to make cells of 8x AA per cell for 12v total then connect all cells in parallel for my battery bank? I am not sure if this would actually be more expensive as it is just an idea I had and have been unable to find someone that tried it (perhaps I am searching for the wrong thing). It seems to me this could be more effective as I could replace one battery in the cell when it goes out and be able to constantly repair the cells in that manner. Has anyone tried this and does it work? Would it require a special charge controller unlike the usual ones sold for solar? If anyone knows of any guides that show this please share them as I would love to do more research on this before I make a decision. I think I saw once on some show that the electric car they showed was setup in this way. Anyway thank you for your assistance it is greatly appreciated!
Asked by TiamatStudios 3 years ago
So basically, for school, we are doing a play in science and our group wants to dress up as different types of bacteria. There are three different shapes of bacteria- rod, spiral and spherical. We need a way to make the costumes and also some help as we live in Australia and aren't very good with costumes. If you have any ideas, please respond. Thanks in advance!
Asked by piggleliggle 8 years ago
I will need and antenna to boost the reception of my 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 10 years ago
Asked by bepco1 5 years ago
I want to hide my cell phone at school. If there's a backpack check, i want my cell phone to be secretly hidden in something that a teacher would not look in.
Will super glue hold this piece back on ?And if the chipped part of the cell is put back in place will the cell work and function as a whole as if it were never broken and generating power = to a new unbroken cell?
Asked by snakdimen 8 years ago
Asked by rehan zai 6 years ago
Asked by Pat_Maroney 7 years ago
I've read that catalytic covnerters use platinum and hydrogen fuel cell required platinum. So is it possible? and is it a cheaper/more affective way to make a fuel cell then by buy platinum to build the fuel cell or buying an actual fuel cell?
Asked by Sun Gear 5 years ago
Asked by snakdimen 8 years ago
Is there a way to recharge a dead cell phone battery? or too put a charge back in to a cell battery?
Asked by bigmark 7 years ago
The reason i ask this question is because my cell phone stopped charging my battery. it's not the charger or the battery...it where u plug the charger into the cell phone that is not making contact. I know that regular batteries (AAA, AA) can be charged universally as long as the battery is a rechargeable one. How about a cell phone battery?
Asked by johnshericosmo 8 years ago
Solar cells are the basic units to build a solar panel. How are solar cells manufactured ? Can it be made at home or is it too complicated a process or not cost effective to manufacture in small quantities ?
Asked by sudeshdewnarain 9 years ago