Zeroing Brother Printer Cartridge Resetters?

[Chris56000]

. . .Has anyone ever investigated whether these Brother Cartridge Resetters can be zeroised?

. . .The reason I ask is that sellers are increasing the prices of these things and, at the same time, reducing the number of reset cycles these things will perform!

. . .When I first bought one they were about £25 for 120 reset cycles, nowadays the sellers have reduced the things to about 30 reset cycles, and increased the prices at the same time!

. . .I did find a web page that says you can purchase an "unlimited reset" type at higher cost but I've never seen one for sale!

Chris Williams

[kloetpatra]

Maybe there is someone who sells Resetters for Cartridge Resetters. Hopefully, they don't include a software counter to limit the reset cycles to increase profits.

[5U4GB]

Depending on how much work you want to put into it, the signals imply an STM8 (hard to tell from the photo), could you dump the flash from an older one with an ST/Link and bindiff it against a newer crippled one to see where the counter is?  Assuming the rest of the FW has stayed the same, otherwise you'd probably have to pull it apart with Ghidra.