Found in a 90s Popular Electronics, this sensor operates by infrared reflection. The components are modern, and the phototransistor can be of almost any type.
This circuit fires by burning the fuse when the input voltage exceeds the value referenced by the zener....
This circuit was obtained in a Portuguese publication in 1979. It is a simple code switch that...
We found this circuit in an American documentation from the 90s. The circuit applies to vehicles...