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.
The operational amplifier is old. The circuit is from an 80's documentation but can be designed...
This circuit is of great use today, when solar energy is becoming increasingly important. The...
The sensor in this simple circuit is a NTC (Negative Temperature Coefficient) resistor. NTCs with...