Transistor testing center (CB23768E)

We found this test circuit in a March 1967 Radio Electronics. The circuit uses a zener-regulated supply and analog indicator.

| Clique na imagem para ampliar |

High stability thermocouple amplifier (CB20684E)
This circuit was found in an American documentation from the 90s. It can be implemented with...
100 mA regulator (CB21168E)
This 2-terminal regulator was obtained from a 1990s National Semiconductor manual. The components admit...
Light Activated Relay (CB948E)
This circuit uses a photocell as sensor and a sensitive relay according the power supply voltage....