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.
This traditional transistor source uses only two transistors found in a 1998 documentation. The...
We find this circuit in a 1995 documentation. It warns when the timing is nearing its end, with...
This circuit was found in a 1967 Electronic Design. The FET is from that time. Capacitor C is...