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 obtained in an old manual valid for practically any type of operational...
This circuit was obtained from Radio Electronics magazine, October 1987. The circuit uses a triac...
This three-digit counter (up to 999) was found in documentation from the 1990s. It uses TTL...