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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

battery

  1. mheruian

    In-depth Battery Knowledge inquiry

    Hi, I'm new to electronics and I've been starting a project of my own which is a charger (since i though i should start first at power electronics since its all about electricity before pursuing switching electronics or automation). I had previously created a charging system (using the li-ion...
  2. Mosaic

    Desulfator Engine, Heavy duty, DIY, Overnight results.

    Hi all: I'm starting a Hackaday project to open source my proven desulfator engine. This is a pulse charge engine for batteries outside the vehicle as it delivers 250W RMS capability to the battery with up to 800A pulses...
  3. Gryphonn

    Using a 12 Volt Regulated Power Supply as a Battery Charger - Questions

    Hi folks I found this forum via a Google (is your friend0 search. I found some threads loosely related to my question, but nothing specific. Hopefully, some of you electrical/electronic aficionados may be able to assist. I have an old 'Transwest' brand Regulated Power Supply in good condition...
  4. A

    Sourcing surface mount high current connector

    Hi All I'm having a dilemna at the moment, I have designned a battery balancing circuit and need connector for this that are rated at 10A max per contact perivously I used a SAMTEC IPBT connector which met my requirement the only problem was the height with the connector and the mating half had...
  5. A

    Battery Management System Design

    Hi all I am in the process of designning a battery measurement and balancing system I was thinking of using a TI BQ76930, I am following the design guidelines found on pages 4-7 (**broken link removed**). The main issue I am having with this design is identifiying the following properties I am...
  6. Cool Name11

    Constructing a 3s li-ion battery pack with a bms?

    I want to construct a 3 s 18650 li-ion battery pack with a bms, could somebody please help me in constructing this circuit i have no idea about the bms and the connections, also please provide a link of all the product that will be used
  7. M

    Lipo Battery Suppier

    Hi I have searched the forums but cannot find the answer, does anyone know of a rechargeable Lipo battery supplier that is trustworthy as a Google search provides companies from China with little information about their reputation ? We would like the battery to be similar to the one below and...
  8. budget minded

    negative terminal corrosion AND now amp's distorting and cutting out with new speakers

    i have a system that consists of a 12 volt 18 amp hour battery, a planet audio BB1200.4 class D 4 channel amp, a JBL GT5-15 sub in free air, and a battery tender charger. at first, i was using proel flash 8p mini PA speakers as mains, but tonight, i hooked up a brand new pair of JBL Northridge...
  9. S

    Beakthrough in solar panels and batteries

    Hi everyone, Have you seem this: **broken link removed** Just what I am looking for.:) spec
  10. K

    Need Help Repairing Old PCB

    I collect old vhs, and recently got some cool gimmick ones that light up when you press a button. However, they are almost 30 years old and no longer work. Taking a look at the pcb both were heavily corroded. I scraped off as much green corrosion as I could and replaced batteries but no luck...
  11. G

    PlayStation Battery Circuit

    I was wondering whether someone could help! Basically, I'm working on a show called Tech Hunters - where we modify old tech like Gameboys, Playstations and all that - and make them useful in a different way - for instance we're putting an oyster card chip in a casio watch so that you can tap...
  12. S

    Is this Application Report Wrong?

    I have been looking into back-flow protection for batteries and chargers and invented this wonderful circuit, and as usual when you search you find that it has all been done before. Just so in this case and the circuit in Figure #5 of the application report linked below, not only uses a similar...
  13. jourylek

    Max charging current lithuim 3s6p

    First of all let me introduce myself, I'm an electrical engineering student in college. I've been working my whole life with electronics but this is my first experience with 18650 batteries. I've made my own 50W high power flashlight and it's working nice off of wall power. However, I want to...
  14. ElectronsFlow

    Anyone have a schematic for a Constant Current DC load tester?

    Hi everyone, I've been surfing the web trying to find a schematic for a constant current DC load tester for use with a battery bank (48VDC) Ideally something that can handle 50amps or more would be fantastic! So far I've only found either low current or useless schematics online with nothing...
  15. budget minded

    12v bicycle trailer sound system details

    this isn't exactly an "automotive" etc. application, but it will be a 12 volt system, just lacking an alternator. there are a few issues i need to iron out though. it was originally supposed to be a 36v system, but that created a lot of problems eg. separate batteries for an EQ/crossover or...
  16. Clarkdale44

    Can a pwm solar cc generate 750w solar power with only 40A current?

    Hello I don't know much about solar stuff.. I have been researching a lot lately on the topic. I stumbled upon this solar inverter on ebay **broken link removed** **broken link removed** It has a pwm charge controller but what interests me is that with only 40A current 750W panals can be...
  17. P

    Buck converter not working as it should

    Hello everyone. I am doing a project in which I use a buck converter to convert high vtg to low vtg. Actually the input to the buck converter is from a solar panel which puts out 560 mA constant current and 34 V. And output is a 12V lead acid battery. The N- Channel mosfet is used at high side...
  18. E

    toy swiches on, moves 30 s, then auto off. How do I auto switch it back on after 30 seconds.

    Sorry if this is too beginner for this forum, this is my first attempt at designing a solution for an electronics circuit. I have the dancing gopher from Caddy Shack, which switches on from a push toggle button, and runs two 3 volt battery powered electric motors which make the item dance. The...
  19. Cosmicray

    Lighted jewelry help

    Would there be a way to make a small led light glow (even dim) constantly for six months to a year (or longer) using thin, and lightweight, batteries? I'm thinking that cell phone batteries will be small and light weight enough but not sure if it has enough stamina. The smallest led bulb I can...
  20. Mosaic

    Helping others & crowdfunding

    Hi All: I've been on ETO a while and learned a lot. Now I've turned my attention (over 3 years) to a serious problem in my neck of the woods and the general developing world. 'Backyard lead battery smelting' and the toxic outcomes. In short I've built and validated a solution that works...
  21. Sam9501

    IPhone Fixing

    Hello, I have got my hands on one of my old IPhone 4 devices, an A1349 model. It had been so long since I used it, that when I found it, I was interested in getting it back up and working. However, I forgot the password and after looking online I found that you could factory reset the phone...
  22. RonaldRandall

    Connecting Inverter Ups with a Solar Panel

    Hi! I may seem a bit dumb here but, please don't be rude. Recently I bought some solar panels for a very cheap rate. I have been thinking to use it at my office. I have this commercial inverter ups system at my office https://www.staticon.ca/product-detail/stativolt-inverter-ups-systems. How can...
  23. P

    Circuit for backup battery connection with 12/24vDC vehicle battery.

    Hi guys, I've a vehicle tracking modem which is going to connect in a vehicle has 12v/24vDC battery. I just need to connect a backup battery(12vDC) to modem for uninterrupt power supply i.e if 12vDC/24vDC battery goes off, want to switch over to backup battery. Also the backup battery...
  24. S

    older version of CTEK MXS 5.0 lead acid charger modification help

    Hello, I have a first generation of CTEK MXS 5.0 lead acid charger. My charger does not have RECOND mode for small bateries. Differences (see attached voltage/curent tables from manuals): Questions: 1. Is there any way to limit the current to 0.3A on my charger that gives 1.5A in RECOND mode...

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