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.
Designed for battery-powered applications with output voltages from 0.8 V to 1.2 V the regulator shown is...
This version of triac control is from a 1968 documentation. The circuit uses components from the...
This circuit was found in the June 1990 issue of Radio Electronics magazine. Integrated circuits must...