three-level touch control (CB7040E)

Found in Popular Electronics this circuit uses common components to control an incandescent lamp with three levels of intensity

| Clique na imagem para ampliar |

Sequential 4017 and Neon Lamp (CB10508E)
I found this circuit in a Popular Electronics from November 1999. The magazine is no longer...
Partial Dimmer (CB7858E)
This circuit of a 1991 PE Hobbyst Handbook allows the brightness of the incandescent lamp to be...
Operational Amplifier Gain Tester (CB25096E)
This simple operational amplifier tester was published in the November 1987 issue of Radio...