This 1968 documentation circuit uses a relay to control loads up to 1 kW (depends on relay contacts). The supply voltage depends on the relay.
This anti-ringing circuit was found in an English documentation from 1996. The integrated circuit is...
The figure shows how to increase the gain of the amplifier stage of the previous circuit. The...
This circuit uses unusual operational amplifiers, but equivalents can be tried. FETs can also be...