This circuit was found in a 90s Popular Electronics. It produces a muted tone similar to that produced by a bell. The signal must be applied to an amplifier.
The components used in this 80's circuit are not common today. The circuit is very sensitive and must...
This circuit is from the 1993 Linear Technology Applications. We can implement the same oscillator...
We found this circuit in a 1967 Electronic Design. The circuit used a MOSFET of the time, which is...