Homebrew PCBs

I think method won't work with new version printers; new printers assign a number to the cartridge and save both this number and ink counter to cartridge chip and the internal battery backuped memory. At the start of every printing and power on/off it checks this number if it is not the same, it starts ink charging cycle which means waste of ink. They also sense removal of cartridge but this is easy to disable by shorting 2 shunted pins of the cartridge to the ground.
  Those of you who interested to make their own CIS also check the below Japanese web
 http://www.geocities.jp/hirai_kjp/printer.html
 Cheers
 Volkan
  

>...(swedish?) method of powering the  printer up with a  good chip and powering it down with a bad one works to reset 
> the bad one. ...