rrman posted:...I traced out all the various boards on my Custom Signal/Atlas signal installation (schematics available upon request, no guarantee they are perfectly correct
). Basically DIN (and most other inputs) are pulled high by a 47K resistor to +5V. This high runs through a series 470K resistor into the PIC 16xxx processor.
Why not just post the schematics here?
But you've explained why the OP was triggering BOTH signals by merely connecting the DIN inputs if the AC power inputs are swapped. The 47K to +5V provides enough current thru the 470K given the local DC power supply to each board surely uses non-isolated (just diodes) rectification.
