I need to amplify a low current (50mA) voltage signal to a higher current without changing the voltage. The voltage output operates a meter that requires around 700mA to move the needle. The voltage range is from 2.3 to 12.8 DC.
I have read that this can be done by connecting the output to the Base of a NPN transistor. But I have also read that when the B is biased enough to allow for current to flow, it connects the Collector voltage to the Emitter, not the Base voltage.
Any help you can provide is aprreciated.
I have read that this can be done by connecting the output to the Base of a NPN transistor. But I have also read that when the B is biased enough to allow for current to flow, it connects the Collector voltage to the Emitter, not the Base voltage.
Any help you can provide is aprreciated.