Found in a 90s 303 Circuits, this circuit triggers a load from a 50 mV audio signal. When the signal ceases, the charge remains active for 2 seconds.
Intended for use with signals from tape recorder pickups, this circuit was found in the December 1972...
In the figure we have the configuration of a voltage regulator with 3 transistors. The components depend...
This circuit was found in an 80s documentation. The integrated circuit used is from that time,...