B6 hobby charger open source firmware

Batteries and Chargers Chargers
1

Here's a way to add internal resistance testing to B6 chargers and their clones. I believe it also allows all of these chargers that have temperature ports to use a usb converter to log on a pc, although some already had that feature.

It doesn't look easy. I'd guess the difficulty is about the same as putting together a BLF FET driver and writing firmware to it, maybe harder since it requires checking voltages and current to calibrate the charger.

Have anyone here already given it a shot? Anyone else want to? I'll give it a go. If I can't get this to read internal resistance, I'm going to need a new charger, so I have little to lose.

Here's a long discussion about it, and its continued development.

Here's the github page:

And another github page:

2

Wow how did you do this?

3

If you already have the AVR ISP programmer for the ATTINY13 and a multimeter, you basically have everything you need. Some leads with pins may help with the programming though, depending on your board is laid out. I just ordered some of these jumper wires to hopefully make flashing the charger more convenient. HKJ shows how to measure current here.

The links I meant to include with the first post are there now.

4

Wish the iCharger series had open source firmware… :~