This circuit was found in a Texas Instruments documentation from the 1980s. The circuit monitors engine temperature by warning of engine warm-up and warning when the fan is on.
Indicated as a joke or challenge this circuit shows how it is possible to control two lamps using...
This beat frequency oscillator or BFO was found in an American 1980s documentation. The circuit is...
This circuit was obtained in a 1980 edition of Elementary Electronics a magazine that no longer...