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.
We found this circuit in an old documentation. The operational amplifier of the time can be...
The configuration shown was found in an old American manual. The circuit can be made with modern...
This circuit for analog video signals was obtained from a Linear Technology documentation from the 1990s. The...