Redox Beta - PCB v3.2 - No visible ISP pins

XDr4g0nX

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Aug 16, 2022, 6:02:30 PM8/16/22

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Hi everyone,

I found this group and wanted to flash my Redox Beta charger with this firmware but after disassembly I was unable to locate any ISP/ICSP pins for this board.

Reading up I understand that this charger is using a ATMEGA32A chip (visualy confirmed) but I am unable to see any usable ISP/ICSP ports to be able to program the firmware.

Has anybody else used these chargers yet and have any tips to flash the Cheali firmware?

Redox Beta - v3.2 -Front.jpeg

Redox Beta - v3.2 -Back.jpeg

Dave

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Aug 18, 2022, 11:58:16 AM8/18/22

to cheali-charger

It looks like there is a USB port ... perhaps they use the Arduino serial bootloader to program it ????

Either that or they use a probe bed to connect to the ISPs pads, perhaps hidden under a sticker.

Or they could be using CPUs that are pre-programmed.

Worst case you could always solder in some flying leads onto the CPU to an ISP connector - I've had to do that before on another project

Dave

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Maciej Brymora

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Jun 8, 2026, 8:41:48 AMJun 8

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Did you succeded with flashing redox beta?

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