3-way control (CB7047E)

This is a simple circuit to control a set of lamps from 3 different points. We found it in an old Popular Electronics.

Cardiac monitor (CB7968E)
Found in a 90’s Electronics Now, this circuit has its output connected to an audio amplifier. The...
Operational Amplifier Twin-T Oscillator (CB18995E)
This configuration that appears elsewhere on this website and in this section was suggested by...
Dual Voltage Source (CB25158E)
This circuit was designed to power the previous circuits of the wireless sound system, but it can...