This common circuit using operational amplifiers was found in the 1993 issue of Radio Electronics Special Projects. The circuit is sandwiched between the pickup and the amplifier input.
The uPC2002 circuit is equivalent to the TDA2002 in this 1986 circuit. This integrated circuit must...
Small time intervals up o some minutes can be achieved with this circuit. Only incandescent lamps...
This circuit with a voltage comparator is delayed by the capacitor. The circuit drives a power...