Speakerguy
Active Member
I have a meLabs U2 USB programmer. It apparently is not isolated, as when I disconnected my power supply from my project board by removing the ground lead it kept working. Apparently electric current was plenty happy flowing through my programming cable, PIC programmer, USB bus, computer PSU, and back to neutral at the wall receptacle. Now yes I should have yanked the + power lead, but anyway I would like to make a simple battery powered isolator board to put between the PIC programmer and my target board.
So first question, which if any of the ICSP signals are bidirectional?
So first question, which if any of the ICSP signals are bidirectional?