This circuit automatically turns off small battery-powered devices after a certain amount of time, saving battery life. We found it in a Popular Electronics from the 90s.
This simple circuit of effects is interspersed between the instrument and the amplifier. It is...
This is a circuit suggested by Linear Technology in a 1980s documentation. The integrated circuit is from...
The configuration shown in the figure uses two NPN transistors activating the load when the input...