5 to 200 seconds timer (CB21401E)

This circuit was found in a 1967 RCA documentation. The semiconductor components are from the time, and modern equivalents can be tried.

| Clique na imagem para ampliar |

Low Power Interface (CB13055E)
In the figure we have a TTL logic interfacing circuit as CMOS logic using a 6N139 optocoupler...
High Pass Filter V (CB19682E)
The components of this filter are calculated using the formula f = 1 / RC and it can be...
Regulator with External Shutdown (CB15662E)
The output voltage of this regulator circuit can be cut (dropping to 1.2 V) from a high level...