This circuit implements a 3-way control, with outputs in A, B and C, using CMOS integrated circuits. I found this circuit in an old publication from 1978.
The transistors in this circuit are 2N2222 and general-purpose diodes 1N4148. The circuit is from...
Figure Bellow shows how to interface CMOS circuitos with TTL using the 4049 or 4050 IC. The power...
This circuit eliminates hiss and other noise from audio sources by cutting frequencies above 10...