Originally Posted by
rgammage
I recommend powering the PC end from a USB connector (+5v @ 100mA) and find another for the other end ... maybe its USB (?) what ever they have to be isolated so the large voltages and currents cannot get back and blow up your mother board!
Richard
Notice on the print the P.P. commons are taken to Earth Ground, they are also taken to earth ground inside the PC via the PC P.S. via M.B. ground connections to case.
This external ground reference shown should be taken to the central earth ground point.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.