Arduino Uno Relay circuit Answered
I am currently involved in a project that requires me to run a fan heater through coding in an arduino.
I have decided to use a relay to act as a switch, to maintain the time period of heater running.
I am using a DOAT 5V 20mA relay.
I was wondering if anyone could help me with the circuit needed using a n-p-n transistor to power it while maintaining switch function.
I know a circuit similar to the one below is needed, but im not sure about the capacitor and resistance values needed for a 5v, 20mA relay.