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 |

Logic Input Motor Control L165 (CB15144E)
We found this shield circuit in the SGS Integrated Circuits Manual of 1982. The circuit is...
Rhythmic Lights (CB23916E)
This circuit with transistors and a crystal microphone appeared in Radio Electronics magazine in...
UHF Booster For TV (CB12592E)
This circuit amplifies the signals in the UHF band starting at 470 MHz, reaching just over 900...