This circuit was found in an American 1980s documentation. It analyzes the exhaust gas of a vehicle using a special sensor. The indicator is a milliamperimeter.
This circuit was found in the August 1992 issue of Radio Electronics magazine. The circuit can be...
This simple circuit with LDR was found in the Radio Electronics magazine of July 1992. Any...
Wien Bridge This Vienna bridge oscillator generates a sinusoidal signal whose frequency depends...