I am needing the development, design and specification of components for a PCB board. It is for a drink dispenser with 5 pumps. The pumps are 12v , 0,5A to 0,7A diaphragm type. I want to action the pumps with a membrane keypad, so will need to go through relays.
The membrane keypad needs 5 buttons (one for each pump) and 1 extra for turning the machine on and off.
The PCB board needs to have: