Relay Switch (CB25864E)

This CMOS 4001 oscillator alternately turns the relay on and off at times set by R2. The circuit is from Electronics Now magazine, June 1995.

| Clique na imagem para ampliar |

Colpitts Harmonic Oscillator (CB5117E)
This circuit generates 100 MHz signals from a 20 kHz crystal. The circuit is from an 80's...
Simple oscillator (CB20531E)
This oscillator takes advantage of the 2000 ohms headphone inductance as the oscillator circuit coil....
Operational Amplifier Touch Switch (CB3853E)
Any operational amplifier can be used in this circuit. The 741 is the most common. Power supply must...