Found in a 90s Popular Electronics, this circuit triggers a load from the audio signal applied to its input. The controlled load depends on the MOSFET.
This circuit was found in a 1966 publication using a microwave transistor of the time. The circuit...
The integrated circuit used in this application is the National Semiconductor's LM2907, the...
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...