Remote Dialer (CB24765E)

This circuit was found in the October 1983 Radio Electronics issue. It is applicable to old analog telephones. The circuit uses common components.

| Clique na imagem para ampliar |

Photo Timed Voice Relay (CB16823E)
This interesting circuit, which can be used as an alarm, was found in a 1997 documentation. It...
Monostable 4047 (CB12734E)
In the figure we have the 4047 application-circuit which consists of the monostable version in...
Relay AC Driver (CB11198E)
With this circuit it is possible to excite direct current relays from an alternating signal,...