The idea of this circuit is that when the device in SO1 is turned on, the device connected to SO2 automatically receives power. The circuit is from Radio Electronics from January 1985.
This low-frequency noise filter of the turntable motor was found in Radio Electronics from the...
The presented circuit has the output voltage digitally selected by the transistors on pin 4 and,...
This is the basic version of a gain 20 amplifier with the LM386 providing a few hundred...