We find this oscillator in a 1980s documentation. The frequency depends on the crystal and the transistor used must be able to oscillate at the desired frequency.
This circuit was found in an American publication from 1965. The circuit uses components from that...
This circuit simulates a multi-position switch using programming buttons. The circuit is from an...
This circuit is from 1972 documentation. The circuit detects when the voltage input is in the...