Triple 5 V Numitron power supply (CB8673E)

This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for Numitron indicator valves used at the time.

| Clique na imagem para ampliar |

Constant Current LED (CB13411E)
This circuit, from a 1976 National Semiconductor manual, is intended for current in a load using an...
Bistable 555 and 4013 (CB15775E)
With each clock of the 555 (negative transition) the 4013 (flip-flop) changes state by activating the...
Interval for windshield wiper (CB22188E)
This windshield wiper interval was found in old documentation. The NPN transistor is general...