The transistor is a 2N2222A the relay a 5 volt axicom d3009 with 30.1 ma coil draw. How can I take a voltage of .5 volts DC as the data line and be able to turn on relay operated at 5 volts DC ? I can use a darlington as well using two 2N2222A's if need be or whatever else works. Dont I have to overcome the .7 volts to turn on the relay driver transistor to saturate for the relay?
I don't have to use bipolar I can use anything that is suggested.
I don't have to use bipolar I can use anything that is suggested.