The operational amplifier used in this circuit is uncommon nowadays. We obtained this circuit from documentation from the 1980s, but it can be adapted to use more modern equivalents.
This circuit was found in ancient American documentation. Diodes are general-purpose types. |...
The circuit of the figure consists of a motor timer that can delay drives for up to 15 minutes....
This multi-purpose power supply provides voltages of +15, -15, 300 and 1 000 V and is very useful on...