Automatic TV power off (CB5945E)

This 80's circuit turns off a TV or other appliance after a set time. The base is a 555 IC and the relay is according the supply.

| Clique na imagem para ampliar |

Four Voltage References with the LM139 (CB14248E)
The circuit shown below provides four adjustable reference voltages. Each of them is produced by a...
Alarm Siren (CB20327E)
This powerful siren is suitable for warning or alarm systems. The components are current and the...
LM381 Magnetic Head Amplifier (CB25281E)
This circuit was found in the February 1990 issue of Radio Electronics magazine. The circuit uses...