Question by jeffreyhastings 9 years ago | last reply 9 years ago
Hello everyone, I want to build a battery pack so that I can charge it with solar. i bought some 12v 1.3ah sealed lead acid batteries but they don't do the job that I want to and they are not very appealing. So I have seen the tesla powerwall and it is great and also slim, so what I want to do is to buy different batteries which are the panasonic 18650 and the stack them together to my own specifications so that they can power small things such as lights and pumps. The packs that I will make would be small at first just to test and have an idea. So is it worth investing in these battery types or just buy some sealed lead batteries and then stack them together. Thanks
Question by Chamburn 3 years ago | last reply 3 years ago
I want to start a battery pack but I don't know how to connect series/parallel to get most mAh but also 5V-12V output I plan to buy 8 3.7V 2600mAh Lithium Ion Battery but I don't know how to connect those together to get the most mAh as possible but also between 5V to 12V output . It is possible to do that with
Topic by Kyosoul 5 years ago | last reply 5 years ago
1000's of ice packs + large polystyrene cooler boxes 2 feet cubed. I need a project, or three to consume these. Ideas?
I have 1000's of ice packs, some are thin flexible plastic, others are the thick rigid plastic type. They come inside large polystyrene cooler boxes about 2 feet cubed. I need a project or two or three to consume these. I can get even more but what would be a good use for them? If I can get a project for these then it will save a huge amount of landfill on a continuing basis. I have lots of space so there is no restriction there. Ideas please?
Question by NB GF 9 years ago | last reply 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
Question by Noblenutria 7 years ago | last reply 7 years ago
I read the instructable on rebuilding the 14.4v cordless tool battery pack and I've done it before with a decent Milwaukee battery. Now I have one that the thermistor is shot. It said 6k8j on it. It was a disc like an advil pill with two leads. Where would I find a replacement? I've looked on digikey.com but can't make heads or tails of it. I imagine you would want it to stop charging at 70 degrees c like a lot of r/c packs do.
Topic by jdubs 11 years ago | last reply 1 year ago
I want to make a 4s4p pack out of 18650 cells. I am asking a lot of questions and doing a lot of research online before buying the parts so I know it will all work when I order the parts. My first question is, should I make the pack out of 18650 cells with individual protection or all connected to one PCM? With protected cells all I need to do is connect the charger and the cells will charge and cut off at the right time? This is the charger I want to get. Maybe if I used protected cells I should charge them by taking them out of the pack and charging them in 4x wall chargers like this one. Say I didn't use cells with individual protection. I have my eye on this PCM . It has a balance control function. I can see the benefit of balancing cells in a 4s1p configuration but does balancing work properly in a 4s4p configuration when 4 cells are acting as one? Lastly I want to make the pack user serviceable so I will use battery holders. I saw some here but it would cost over 50 dollars for all the holders. That seems too expensive. Do you know of cheaper ones? Thank you for your input -Jacob
Question by Noblenutria 7 years ago | last reply 7 years ago
I was thinking I could do a conversation about this under my instructable and I probably will but maybe I can get different feed back from here but I guess you would need to check my instructable first to really know what I am talking about unless you are some one who is also sticking organic packing peanuts as an art media. https://www.instructables.com/id/Amazing-packaging-peanuts-/ AND I would love so much to here from some one doing the same stuff because I have yet to hear of any one else doing this or even if I could start to hear of people starting to do this would be cool.
Topic by thaicares 7 years ago | last reply 5 years ago
Hello all! I am currently in the process of designing an (increasingly) large project using LED light strips. These are the strips I intend on using. Expensive? Yes. Worth it? It should be. The other thing is that this is a portable project, one that I want to be able to use without being tethered to an outlet. Basically, what it comes down to is that the project involves using about 8.25 meters of light strip. I say about because I haven't done precise measurements, but I'm buying ten meters which should be plenty. This adds up to 264 LEDs total (for the 8.25, not the 10). Each LED can draw up to 60 mA at full brightness, so all of them at full brightness would draw almost 16 A >_< I am thinking that the best way to go about this would be to build four smaller battery packs, each powering about 2 meters of strip. I was looking at using these Li-Ion cells. The only problem is that I do not know how to accomplish what I am trying to do. I am still befuddled by the relationship between a battery's "C" rating and its mAh, and I am quite unsure of what kind of circuit these batteries need to be used with to prevent killing them, or worse, fires. What I really want is to be able to run the entire thing for 3-4 hours on a single charge of all four of the battery packs. But I also want to have the possibility to run all the LEDs at full brightness (albeit for a fraction of a second) without damaging the circuitry. Another problem I am encountering is that these batteries are 3.7V, and the strip needs about (but no more than) 5V to run. I appreciate any advice, help, references, etc. you can give me. I don't need a full blueprint or schematic of how exactly to do this, but I do not even know in which direction to start looking. Thanks again.
Topic by SteamEngenius 6 years ago | last reply 6 years ago
Hi, I have 4x PANASONIC CGR18650CG LI-ION BATTERY 2250mAh 3.7v. I have connected them in series and it gives around 14v. My internet router is working on 12v 500mA. Is this battery pack too much for that router? I was thinking to use that battery pack as backup for my router when there is no electric power, because it's winter and every few days there are problems with power. Thanks!
Topic by AdvanŽ 1 year ago | last reply 1 year ago
Right now i'm trying to build a circuit that goes from a two AA pack to a switch to a potentiometer to a motor but every time I try to add a resistor of any size it always stops working. When I don't add the resistor the battery pack just melts and I have to buy a new one. Does anyone know how I can stop this from happening?
Question by Waveform19 8 years ago | last reply 8 years ago
I'm looking for a design (ie: instructions, ideas or patterns) on how to make my own Alpaca pack. The packs are too expensive to purchase from the local co-op or grange. I have priced them online as well and am completely shocked at the prices. If you have built this type of item for a llama, donkey or mule it is probably adaptable. We are looking to use our Alpacas around our farm to carry feed and tools as needed, and also to help carry firewood back to the house from the back country. Any ideas will be gratefully appreciated.
Question by 11d2skado 9 years ago | last reply 9 years ago
I'm working on an ebike conversion. I'm buying laptop batteries to take out the 18650s and put them in my pack. I'm looking at a 10s 37v pcm. If I make it in 10 sets of 6 to get 37v 14.4ah, then how can I safely charge the battery so that they don't charge unevenly in each set?
Topic by leaf26 5 years ago | last reply 5 years ago
Hello everyone, I just won a prize for the instructables ornament and I was filling the details form. Then, I read one statement which stated that if I live outside US then I will receive a coupon of the prize value. I am not a fan of money but a fan of Instructables. So, at last I want to say that I would like to get the instructables prize pack instead of a $10 coupon. If you will send the pack, it will remain with me forever but the movey will get spent Thanks
Question by Gagan jain 3 months ago | last reply 3 months ago
I have a project that I have been working on, and it currently runs on two different battery packs for different components. I want to put rechargeable batteries in these packs, and I want to install a wall charger to charge the batteries. I am having trouble finding a good tutorial on the circuitry of this. Will I need two different chargers for the two components, or can I charge both from the same power supply? Can anyone help me out? I can post some photos of the project and its current circuitry if needed, its a laser spirograph.
Topic by ugman77 8 years ago | last reply 8 years ago
Ok here is what i wanna do, and your all gonna think I am crazy, but this is mostly for my little girl. I want to take a very cheap dvd player and another cheap video screen, (the kind you find for the back of auto head rests) and glue them together, make a battery pack, and wire the two together to the pack and, the point is I have the devices and they both are rather low energy draw devices, so i just need to know if I can make a battery pack or perhapse a radioshack project battery holder and how many batts I would need etc.. I will admit the math is a bit confusing for me. but here it is, the dvd player is rated as AC 120 v, and it says it has a draw of 10w, which if I am not mistaken is very low drain and awesome for an ac device. the monitor is DC with an adapter but can also have an optional car adapter (which I don't have, but I would just use the transformer's cord/jack to wire it in.) The back of the monitor says it's DC output is 1.2A and again 12v and the transformer itself says it's input is 24w. So if my math is right, I am looking to make a battery supply to support a total of 34 watts and then I will use both cords to wire them parallel to a battery pack that I need to make, so where I need the help is what kind of a batt pack do I need to make or is it even possible?
Question by blackmagickfox 6 years ago | last reply 6 years ago
I am new to LED's and havent messed with electronics since the 80s, so excuse my ignorance and all of the questions. My question is, if I have a 3 AAA battery holder, each battery is 1.5 volts, for a total of 4.5 volts. If I have a 2 volt LED and use only 2 batteries (3 volts), can I solder the resistor into the 3rd battery compartment to lower the voltage, or must I use a dummy battery and put the resistor between the battery pack and the LED? Thanks!
Question by pennsteve 9 years ago | last reply 9 years ago
Does anybody know what parts I'd need to make a 12v rechargeable battery pack for an upcoming road trip? I also need to know where I can find deep cycle sealed lead acid batteries for this project. I waited long enough to make a lithium ion pack, but now I changed my mind on the battery type to get 12v, and now I have no idea of what protections and electronic components I need for it. I'l post more info on available casing later, but I'll tell you now that it's like a small blue lego briefcase from when I was little. It's about the size of a texbook and I'd like to be able to put it in a small backpack to carry around school sometimes for my windows tablet. Update: I am available to buy any particular case, but wiring in a case can sometimes look bad, so I'd like it to store all wires internally and have a friendly look. Appearance was part of why I switched my plan from li-ion 18650s to lead acid. A block with printed volt and amp information looks better than a group of oddly sized cells. Also, no clocks.
Topic by leaf26 5 years ago | last reply 5 years ago
I have a ridgid impact. It cuts off when im assuming the curuit board inside the battery senses to much load. ide like to fix this problem with an override on the circuit board or just bypass the board itself but i need to know, does the battery charger know when the battery is charged or does it need feedback from this curcuit board in the battery? thanks
Question by thomas7.3psd 7 years ago | last reply 7 years ago
Hello everybody, I need to install (build) a recharging battery pack for my plant shelf. it will be running an arduino nano, just 3 leds (3mm 20ma each) 1xNTC and 1x water sensor probes (nails).-- no LDR no yellow LED. . I was thinking about getting a 2x 18650 battery holder - I need more battery hours, should we wire the batteries in parallel to get more mAh and boost them 3.7V to 5V. so basically this is what I am trying to custom build to get more hours; DIY Mobile Power Bank Case Kit . I would just buy the mentioned product BUT under specifications>battery it says the capacity range: 1000mAh and below. but the batteries I have are 3.7V @ 5000mAh. does this mean that the remaining 4000 will be lost because the system can't handle it? . basically what I am asking for is how can I make a long lasting arduino nano powering 18650 battery pack BUT also with a recharging module. these are the items I found that may work together, please remember that I have no electrical experience from before. I have learned everything that I know from instructables, this is a too advanced build for me to figure out without asking a few questions. thank you for your patience, let me know if I have to clear anything out. batt holder: recharger: boost: am I even in the right track with this thing? can these be connected together and a switch. again, the goal is max battery life.. maybe add 4x 18650 - 2in parallel + 2in series, 7.4V to arduino Vin, eliminate the booster, even more battery life ? . thank you in advance, love & peace akin,
Question by Akin Yildiz 4 years ago | last reply 4 years ago
Hi! first of all happy being here in such a full and interesting community. Since some time i have an idea fix, i would like to play guitar in the street, not for the sake of money but for pure entertainment. Following that intention i´m being gathering all equipment i need for that purpose. I was asking myself the question about power source for all that stuff. Actually i can make it easy, since i already bought roland cube street, that runs on 6 AA batteries. BUT, i guess nobody here likes easy things. Therefore here is my project: using acoustic guitar with 4 effects and the amp running on the SAME external battery pack. short description of the project : 4s4p battery pack for a total of 14,8V and 12 000 Mah more or less.. will depend on cells themselves. Theoretically it will mean 10 hours or continuous run with all of equipment. of course there will be step down converter and other bells and whistles that i will be happy to share once i start doing it. Questions mainly are : I know that Boss pedals have center negative connection, What the hell does it mean? please someone help with this cause im getting mad. Is it just inverting the leeds? positive one going to the sleeve and negative/ground to the pin? OR it means that the pin has to be minus 9V? This is the main question as i dont want to burn 200 euros pedals second and less important one: i will mostly go with NCR18650GA units. And will arrange a balanced pack. As the charging rate is 1A rough it takes 3,5 hours to charge. If the total capacity is 12 amp as i'm planning will it be neccessary to wait 12 hours to charge it or 4s4p scheme will still need 3,5 hours to charge all of cells at the charge rate of 1A, can i also charge it at faster rate as cells state that discharge rate is10A and so i coud use up to 10A charger? Or maybe the smart chargers identify by themselves the best charge rate? thank you in advance please know it's my first project of the kind :D
Topic by IgorA26 2 years ago | last reply 2 years ago
My next Instructables is going to be how to fit all your necessities for good hygiene into an altoids tin.Yeah, I know, there are like a million altoids tin can projects, but this is different... kinda. Anyways I have a list of things that will be in the tin and I just want to know if anyone thinks I am missing something, or anything else someone wants to say .Thanks! Here is the list of things going in the tin: toothbrush toothpaste comb soap wash cloth deodorant lotion floss q-tips any more ideas or things i should put, please comment, thanks!
Topic by connorcancount! 11 years ago | last reply 10 years ago
Ok I was just looking at this ible. And noticed the type of battery the guy used. So I did some googling and ended up here. Wondering to myself about trying to retrofit this type of battery into a veloteq challenger from 2008 or so. Remembering that its a 48 volt pack built from 4x 12volt lead acid 20amp batteries(cells) wired in series thus to stack the voltage and not the amperage. Now I know amperage is simply a measurement of consumption so I'm guessing that these Yellowtops are way above the usual 20amp's that the veloteq asks for but I'd imagine that shouldn't make much of a difference. Seeing as I only want to throw on two of these as to not blow way past the weight restriction on the ebike itself by hitting 48 volts with four of these also to avoid breaking the bank with an 800$ purchase. Could I not add some sort of transformer to step up the voltage to 48 volts or something like this? Any suggestions are welcome but I can't imagine this would really be all that bad of an idea. I'd imagine it should boost the range somewhat if not a fair bit. I'd imagine that my assumptions here are not far off but I'm here to either be validated or corrected. Or even educated if someone has any suggestions or advice.
Topic by chamunks 6 years ago | last reply 6 years ago
I need to create a battery pack with 7.4 to 7.5 volts and 800 mAh (or greater) in the lightest package possable with alkaline batteries. If circuitry is needed that would be fine. Its for a mid-small sized RC Helecopter
Question by physics_dude 8 years ago | last reply 8 years ago
To all of you night bikers out there, do you power your lights with a battery pack of NiMh or Li-Ion battery packs, or do you use a lead-acid car battery? The weight of the car battery kind of turns me away from it, but I don't want to have to recharge my batteries every day. I'm looking to power LEDs and maybe halogens. Thanks!
Topic by Bran 11 years ago | last reply 11 years ago
Over in Scotland, some crazy fellow has just set a new speed record for the jet pack at 61 mph. The official speed reading was done by some cops with speed guns apparently, although I'm sure the video evidence also helps. via Gizmodo
Topic by fungus amungus 9 years ago | last reply 9 years ago
Hi all,i want to build a battery pack from mobile phone batteries my plans is to connect them in parallel 4 of them and charging it from a single TP4056 module the batteries have a built in protection circuit each battery is 3.7v 1500mah. what do you thing is a good idea to put them in parallel or they need something special to keep them balance any help is highly appreciated thanks in advance
Topic by 8anashsb 3 years ago | last reply 3 years ago
I need the cornstarch packing peanuts so that when the bead is done baking, the cornstarch will melt, leaving me with a filigree style bead. I am using polymer clay to make the bead. I don't want to deal with the mess of melting beeswax in my oven, plus the cost.
Question by alison528 7 years ago
My MIT undergraduate advisor and all-around-mechanical-design-ninja, Alex Slocum, created these foam building blocks/packing material, he calls Foameez. He sent Instructables a box full of them hoping we'd be able to come up with some cool uses. So far we've made Marge Simpson hair and a Fantastic Four Thing-like costume. What would you build with these? If your idea is compelling enough, I'll send you some...
Topic by ewilhelm 10 years ago | last reply 10 years ago
Microsoft has finally came out with the Vista Service Pack 1(SP1 for short). This will fix many of Vistas bugs. How ever, Microsoft says that it will come with its own bugs, but not many. Click here to learn more about Vista SP1. You can download the SP1 at the Microsoft technet website.'Microsoft recommends that you hold off getting this till mid April because it will be downloading with the automatic up dates.
Topic by Charger_06 11 years ago | last reply 11 years ago
I am making a simple circuit with only batteries and LED strips - I know it must be shorting but very new to this and wondering how I can find the short and fix it? It takes around 4 minutes to melt the pack, I am using 8 AA batteries as was told the LED strips work at 12V. Would really like your help.
Question by scooterlights 6 years ago | last reply 6 years ago
For a while, I wondered what was inside an Instructables prize pack. Now that I've gotten one, I decided to post the contents so that others know. An Instructables t-shirt (you can choose the size)A notebookA cardA tattooA pin2 stickers, one large and one small and roundAlso, a huge thank you to the Instructables team for organizing contests! YAY!
Topic by ProfessorPi 10 months ago | last reply 9 months ago
I am wondering if its easily possible to convert a mp3 that runs on AAA to mains via a power pack, which we all seem to have plenty of laying around. i realise that the AAA battery is 1.5v or there abouts while the closest spare power pack i have is 4.0v dc / 350mA will it work, or is it possible to further step down so it would be suitable ? via electonics - or do i need to find a powerpack that matchs a AAA battery voltage. i was going to wire this to the battery terminals ... or am i just looking for trouble? lol
Question by agatornz 9 years ago | last reply 9 years ago
Hey ppl, I bought an energizer wii induction charger earlier this year. A few months later, I started getting a red flashinglight on the charger and the batteries wouldn't charge anymore. I got the battery packs replaced because it was still under warranty, and I still have the old battery packs. I opened them up because they're pretty simple to dismantle (just 2 screws) and there are two unbranded AAA batteries. I was wondering if any rechargeable AAA battery can be used with it. Also any ideas on other possible uses for this induction hardware? Check out the pics below:
Topic by atomicrabbit 8 years ago | last reply 8 years ago
Design collective For Use/Numen used about 117,000 feet of tape to make this fantastic web in a former stock exchange building in Vienna. It's strong enough for people to walk on. In fact it wsa made for a dance troupe. “The installation is based on an idea for a dance performance in which the form evolves from the movement of the dancers between the pillars,” explains For Use’s Christoph Katzler. “The dancers are stretching the tape while they move, so the resulting shape is a recording of the choreography.” Check out the link for more pictures and a video. Designers Spin Spidey-Worthy Webs From Packing Tape via Neatorama
Topic by fungus amungus 8 years ago | last reply 8 years ago
I am new in electronics, and I am building an LED circuit with 2 AA batteries, green LED, and toggle switch. I put the batteries in the circuit (it's a 9v battery clip with a Two AA Battery holder) and it ran for a bit, then the bottom started to melt a bit. It is an older AA holder but the 9v clip is new. Is it because of the old component, switch, voltage, anything!
Question by cboudreaux3 6 years ago | last reply 6 years ago
Hello, I see that as a Runner-Up winner for the Summer Fun contest, I can either receive a t-shirt or stainless steel mug. However, when I click on the link to claim my prize, I only see the option for t-shirt sizes, and no option to choose the stainless steel mug. Is there a way we can choose which one we want? Thanks!
Topic by umami_tsunami 2 years ago | last reply 2 years ago
I'm trying to make a flat pack interlocking chair but cannot figure out how to get the bottom pieces from falling out when right side up. If I want the chair to have a uniform square shape, I don't think I can make the locking cuts at any angle.....so, the bottom keeps falling down. Below are two examples of interlocking that confuse me. The first is a link to the table upside down. The second is a link to the table right side up.....Can someone please explain how the long pieces which are in the "under" position of the lock do not fall out when turned right side up? http://www.ryandartdesign.com/work.cfm?listPos=11 http://www.ryandartdesign.com/work.cfm?listPos=10 Thanks!?
Question by Chasingthesun73 7 years ago | last reply 7 years ago