I read somewhere that you should not use transistors for current loads over 5A, is this right?.
Using a relay with 15 to 20 AMP contacts @ 12V... but these relays can also be costly
You will have to use a switching transistor to power the relay coil under arduino control.
Also,Quote from: retrolefty on Today at 13:30:00You will have to use a switching transistor to power the relay coil under arduino control.What exactly does this mean?
So let me se if I´m getting this right - the pump needs 12V, 11A to run. And the relay needs 12V to run. Would it be correct to assume that I can power both these from the same source?.