This fader or fader was found in a 90s Popular Electronics. The circuit uses transistors that are equivalent to BC548. Input and output cables must be shielded.
Other voltage comparators can be used in this circuit that we found in a Popular Electronics from...
This two-input limit detector was found in an American 1980s documentation. The circuit can be...
This circuit was obtained in a 1978 English magazine. This adjustable stabilized power source...