I have put together the following circuit to drive some 12V pumps from a micro-controller using a ULN2003, but it has a few issues.
First issue is that the relays click in immediately. I want the relays to only kick in when signalling from micro.
The second issue is that when the motor comes on, it stays on. I think it is browning out everything and causing havoc. With the motor running I read 2-4V at the com pin of the ULN2003.
Does this schematic look correct? What would cause the motor to do that?