Hi! Could someone help me with some power supply questions?
Attached is the picture of what I am trying to do.
My project has 3 separate power supplies. Power supply 1 is for a motor. Power supply 2 is for a tape head. Power supply 3 is a small wall wart to provide external power to the microcontroller. I want to put all 3 supplies in the same housing.
Do I need to connect all 3 DC GNDs together? Power supply 2 came with the housing and already has its DC GND connected to the chassis. Right now the other new 2 are not connected to the chassis.
My new control panel has jacks and pots on it. Should this panel be conductive and connected to the chassis or which GNDs? My jacks and pots are using AGND on the microcontroller. So maybe this panel should stay isolated from the chassis and other grounds?
Power supply 1 has the three prongs to the AC outlet. The other power supplies only use two prongs to AC. Do I need to connect the AC GND on power supply 1 to the chassis?
- Basically I just need some help with the overall grounding system of what you see in the picture. Thanks so much for the advice!!