We found this circuit in Radio Electronics Special Projects from 1992. The circuit turns on the power when the microphone plug is inserted into the input jack.
This VCO or Voltage Controlled Oscillator was found in a Popular Electronics from 1991 but can be...
We found this circuit in the October 1994 issue of Electronics Now magazine. The circuit uses a...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...