Hi all,
I'm trying to find a simple transistor amplifier circuit that can boost the signal from a MP3 player from the typical 0.5 - 1.0mV range up to a value that can drive a transistor switch (~1V). For simplicity's sake, I'd like to avoid using op-amp IC's, if possible. The very low voltage from the player can't pull up the base on the 2N2222 that I'm using for the switch. All advice is appreciated!
Gary
I'm trying to find a simple transistor amplifier circuit that can boost the signal from a MP3 player from the typical 0.5 - 1.0mV range up to a value that can drive a transistor switch (~1V). For simplicity's sake, I'd like to avoid using op-amp IC's, if possible. The very low voltage from the player can't pull up the base on the 2N2222 that I'm using for the switch. All advice is appreciated!
Gary