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.

Non Inverter Chopper (CB6458E)
This circuit was found in an English operational documentation from 1970. The circuit can be...
Triggered Damped Oscillator (CB13441E)
This circuit is from a 1974 publication. It generates a pulse with several sinusoidal cycles from...
Solar spinner (CB20508E)
This solar cell driven circuit makes 4 LEDs run at a speed given by capacitor C2. The circuit is...