This circuit is from the September 1985 issue of Radio Electronics magazine. The circuit has an LED charge indicator and is based on CMOS logic. The MOSFET must be equipped with a heat sink.
Two inverters of a 4069B type CMOS integrated circuit form this oscillator which is characterized by having...
Raytheon's used operational amplifier is rare today, but the configuration can be adapted to use...
Found in a radio amateur magazine of the 1980s, this circuit uses components that can still be...