Starting a new thread... hop[e this is OK, mods. So, I've bought further into the Bruce Chubb CMR/I world with the acquisition and construction of two Searchlight Signal Driver boards to drive up to ...
OK. A bit more reading and head scratching.... let's see if I have this right. Resistor values chosen for 0.5mA current flow. DCCOD > Arduino one. Tie the 12VDC and 5VDC power supply grounds together, ...