We found this circuit in a Radio Electronics from October 1976. The components are still common, but the circuit applies to older car models with contact breaker ignition.
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...