Hey all,
Thank you so much for all the advice. I don't have the relays yet, but I'm thinking to use optocouplers because of their high speed. The outer circuits only need close contact switches, so low/no current is necessary, I'm now researching if there are any optocouplers that can close a low/no voltage circuit. Any ideas?
Thanks Wawa and CrossRoads for offering hardware options. The Mosfets and relays need a voltage in the end circuit though right? If I can add voltage to the end circuit to make it work I may be able to use these.
Tom, the final goal will be to switch them on in sequence from 1-300. Each relay will be on once, but not at the same time. I tried connecting multiple Arduino's together, by sending an output signal from one to another (with it's separate program) to start, but there was a slight delay in that transition, so I think working with one program is best.
Thanks,
B