neazoi
Advanced Member level 6
Hi, I want to make a simple ptt driven by the sound card of the PC. I have connected a 2n7000 source to the ground and the drain to a relay coil (with internal diode) then the other contact of the relay coil to the vcc. The 2n7000 pulsates the relay on and off when I touch the gate with my finger, possibly because my hand acts as a receiver antenna for the hum in the lab. The point is, if the mosfet is that sensitive, why can't I make it turned on by the audio of the sound card after rectifying it with a germanium diode?