Geiger Pulsating Indicator (CB23617E)

This circuit is a suggestion from a Radio Electronics from October 1964. We found it in the patent section.

| Clique na imagem para ampliar |

Flowing LED VU (CB18718E)
We found this VU circuit with special effects in an LED array in a 1991 documentation. The circuit...
Electronic Roulette (CB24471E)
This game with digital logic circuits was found in the December 1976 issue of Radio Electronics magazine....
Four Way Call Warning Light (CB17693E)
This 2009 circuit is a bilateral call warning. Easy to build, using light communication between two...