Hi all I have my home built printer in the garage and although I dont mind leaving it running during a long print, I would very much like to be able to use the M80/81 code at the start and end of my gcode to make or break the black and green wire connection on the ATX power supply to power down the printer. The green wire has to make connection to a black negative wire to energise the 12 volt printer feed. Is there any two pins on the sanguinololu 1.3 board that can make or break via the M80 M81 gcode
