The operational amplifier of this circuit can be the 741. The circuit has very low consumption and can be powered by two 9-B batteries. Low voltage amplifiers can be used.
This interesting touch dimmer was obtained in a 1993 publication, basically consisting of a...
This circuit was found in an Electronic Design from the 90s. The circuit uses a type J...
This amplifier was published in Radio Electronics magazine in September 1959. The 8-transistor circuit...