Found in 90s Popular Electronics, this circuit fires a load through a MOSFET from an audio signal applied to the input. Power supply is done according to the load.
E) This circuit was found in documentation from the 1980s. The integrated circuit used is not very...
The circuit shown in the figure makes it possible to trigger a load after times that can extend up to 4...
This circuit with operational amplifier was found in old American documentation. It can be...