This circuit was found in a 90s Popular Electronics. With it, using a 4066, it is possible to control between 1 to 100 the gain of an operational amplifier like the 741.
This circuit uses an optocoupler to obtain a solid state relay whose power depends on the Triac...
Small time intervals up o some minutes can be achieved with this circuit. Only incandescent lamps...
We have a simple and useful circuit found in a 1982 documentation which generates a signal in the...