Delayed relay (CB10191E)

This simple SCR delay circuit for activating a relay was found in documentation from the 1980s. The components used are common today.

| Clique na imagem para ampliar |

Intercom with telephone (CB7829E)
Old phones with dials can be used in a simple home intercom system, as this circuit from Popular...
Step Generator 555 (CB11407E)
This circuit generates slow interval steps for controlling stepper motors. The circuit has two...
Sound effects circuit (CB9206E)
This circuit was found in an Elektor from the 90s. It is a circuit that generates different types of...