TTL Siren (CB9080E)

This simple TTL siren was found in a 1980s Electronics Today International. The power supply is 5 V and the integrated circuit can be the 7400.

| Clique na imagem para ampliar |

Stabilized Amplifier (CB19901E)
This circuit is temperature stabilized. Modern equivalent transistors can be used, and the power...
Solid State Relay (CB15406E)
This circuit uses an optocoupler to obtain a solid state relay whose power depends on the Triac...
NC Power Relay (CB14816E)
This power step for relay activation was found in the 1964 RCA transistors manual. The circuit is of the...