/diy/ - Do It Yourself

>>1688272
Maybe it would help to see more of the circuit.

The arduino analog, digital, and serial devices will all receive their power from the 5v sensor terminal block.

The i2c devices will as well, however the 8 channel relays and the tb6600 motor controllers will also use the 12V 600w supply for their loads.

My understanding is that my LED PWM controller needs to jump to the arduino ground and the 24v 600 ground. I was just thinking about running a jumper to all negative outputs on each power supply and the arduino gnd pin.

Not shown here are mosfets, the power wiring for sensors, resistors, and kickback/rectifier diodes on pumps/motors/solenoids.