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.
This circuit is from a 1975 magazine, but it is still current as all components are common. Use...
This configuration is from an old Motorola documentation from the 70s. The circuit uses operations that...
This Dimmer circuit for incandescent lamps was found in an English documentation. The input...