196
« on: July 30, 2022, 02:54:35 AM »
Do you mean that you had 11.5v on the kbic before connecting and 3.5v when connected to the c11g? That would be consistent with the pwm circuit on the c11g requiring more current than the kbic can deliver. Your circuit should work (though I haven't checked the pin assignments) provided the isolation on the 12v supply is OK, but since it has to allow for the negative output to be grounded it should be. The key factor in isolating a psu is having a transformer inside, either a chunky mains one or a tiny high frequency one in a modern switched mode type.