Using a 4046 PLL, which is not very common nowadays, this circuit was found in the October 1994 issue of Electronics Now magazine. The power is provided by the transistor and is small in this case.
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...