Two seperate voltages 5vdc and 12vdc.
I have a 5volt supply, very low current. I'm using that 5 volts to turn on a npn transistor. I wanted to use that transistor to turn on a 12 relay, but I know It wont work because my 12vdc supply for the relay is not the same common as the 5vdc. How can I do it? In other words how can I turn on a 12vdc relay using a rated power source of 5vdc about 50ma. The rated input currect on the relay is much higher than 50ma, I dont remember exactly how much maybe 200ma. The 5volt supply can turn on the trans but not the 12vdc relay. Thank you as always.
I have a 5volt supply, very low current. I'm using that 5 volts to turn on a npn transistor. I wanted to use that transistor to turn on a 12 relay, but I know It wont work because my 12vdc supply for the relay is not the same common as the 5vdc. How can I do it? In other words how can I turn on a 12vdc relay using a rated power source of 5vdc about 50ma. The rated input currect on the relay is much higher than 50ma, I dont remember exactly how much maybe 200ma. The 5volt supply can turn on the trans but not the 12vdc relay. Thank you as always.