This lockable two-position servo control system was found in documentation from the 1990s. The error amplifier can be an operational amplifier and the sensors are phototransistors.
Poptronics recommends this circuit for use in the car when the headlights are left on. The circuit...
This is a change from the previous interface, also used an uncommon operational one today. The...
The purpose of this 1967 Philips circuit is to produce a rectangular signal from a sharp pulse....