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.
Maxim MAX20333 Adjustable Current Limit Switches Maxim Integrated makes available from Mouser...
Voltage comparators, such as those in the LM139/239/339 series, consist of devices that can be...
The deviation of characteristics of this circuit normally referred to the temperature is very low....