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.
This source draws a fixed constant current of 1 mA using a Norton operational amplifier. Other...
We have in the figure a traditional amplifier configuration with operational amplifier. The source...
This two-way switch or control shows how to control a lamp from two points. This version is from a...