This traditional crystal oscillator configuration can use any CMOS gate configured as an inverter. R1 has values from 1 to 5 M ohm and R values around 10 k.
This circuit was found in a 1980s documentation. The diode is general purpose. The circuit is...
This circuit with the known PLL 567 can be found in other versions in this section and in this...
This circuit was obtained from an English magazine from 1976. The circuit monitors a car lamp,...