Using an analog microamperimeter this circuit has a phototransistor adapted to the wheel as a sensor. The circuit is from American documentation from the 1980s, but the components are common today.
This circuit is from a 1980s Motorola documentation. The circuit makes use of old components that can in...
This circuit is from the 1990 Motorola Linear Databook, which can be developed with more modern...
This simple low power stage with output transformer was found in an American documentation. The transistor...