• 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.


  1. T

    MAX712 NiMh battery charger problem

    Hello everyone, I hope you'll take few seconds to think about my problem, I actually did some troubleshooting. I just made a design for Max712/713 battery charger to charge a 2cell NiMh battery Input voltage is 6V, I took an MJD210 as mosfet. Please find the design in the picture below...
  2. S

    Charging circuit

    I am designing a hand cranked charging circuit for a NiMH battery. I have used a LM317 voltage regulator however im not sure exactly what output voltage to use for charging a single 1.2V AAA cell. Can anyone help?
  3. S

    Hand crank torch - NiMH charging

    Hi there, So I am interested in the charging of NiMH batteries, some websites say that they should not be charged over 0.1C, some say 0.5C some say not over 1C. I bought this wind up torch with a 80mah 3.6v batteries pack and noticed the current flow is around 200 mA, this is 2.5C. So my...
  4. J

    AAA NiMH Backup Battery Pack for 12V Automotive Use

    I have been asked to play a role in the design of a 12V backup battery pack that would be used to backup a vehicle security system and siren in exclusively AUTOMOTIVE applications. I have general electronics experience but no experience with the design of a battery backup system, and the...

Latest threads

EE World Online Articles