This circuit works as both an injector and a signal follower. We found it in the May 1994 issue of Electronics Now. The Z1 headphone must be high impedance.
Intended for use with signals from tape recorder pickups, this circuit was found in the December 1972...
This circuit can be used as an amplifier for musical instruments or even with your cell phone. The...
We have in the figure as a monostable a proximity switch where our body capacitance (estimated at 200...