Chess game timer (CB7084E)

This RCA circuit provides timing intervals from 5 to 120 seconds. The components are of the time, but they admit modern equivalents.

| Clique na imagem para ampliar |

Current Regulator 7805 (CB15334E)
This circuit is the conventional use of the 7805 as a constant current source up to 1 A. The...
Single Pulse Generator (CB20112E)
The integrated circuit used in this application is not currently common. The circuit is from an...
Class B Amplifier (CB23697E)
This circuit is from a Radio Electronics from February 1966. The circuit is of a type that was...