charging module

  1. E

    3.3V battery pack / charging solution

    Hi folks! So I'm looking into the following, but having a very hard time finding any (remotely) definitive answers. For my smart home, I'm looking to integrate more and more sensors that can relay all sorts of information. Most of these sensors I create myself using ESP32's and the like...
  2. E

    Charge two 18650 using single tp4056

    I have two 18650 batteries to charge using TP4056. I have seen in at many posts like people are using individual tp4056 charging module for each 18650 battery and also observed like some are using single module to charge two 18650 battery. Is it fine to use single tp4056 charger circuit to...
  3. G

    Li-ion cell charging module resistor selection?

    Greetings. A vendor selling TP4056-based 5 V charging modules for Li-ion cells specified the following resistance values and resulting current for selecting the current-programming resistor: R (kΩ) I (mA) 30 50 20 70 10 130 5 250 4...
  4. Mally110

    Help, underwater 18v alarm

    Looking for some help and guidance on a personal project for my sport. I play underwater rugby, at international level, the referees in this use a cable operated buzzer system. Now this is a pain. I've designed a small(ish) remote buzzer that will remove all cables to the surface. My only issue...
  5. Carlosonline

    Li-Ion Battery Managment IC Issue

    Hi, I would appreciate if someone would be able to comment/advice on the following matter. I have been looking around for an IC that would charge and balance Li-Ion cells 2-3 of them in series. It seems that the balance feature is absent in most cases. MCP73841 appears to provide most of the...
  6. G

    Multipoint Charger for a RC car

    Hi all , Im working on a little project, a RC car witch is powered with a mobile phone power bank . Power bank will supply power to a H-Bridge wich will supply power to the motors and a renesas sakura board (wifi controlled) . The power bank is charged with a USB cable while not running and...