Complete Alarm with NO and NC Sensors (CB24141E)

We found this circuit in the July 1971 Radio Electronics magazine. The circuit activates a Sonalert or a relay for a higher power warning system.

| Clique na imagem para ampliar |

Universal power control (CB8709E)
This circuit was found in a 90s Popular Electronics. The circuit uses several relays in order to...
Amplifier with AC Coupling (CB19785E)
This circuit was obtained in an old manual valid for practically any type of operational...
General Purpose CMOS Switches (CB24987E)
This bank of switches can be programmed in a variety of ways for logic experiments. The circuit is from...