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.
We found this circuit in a Poptronics from 1998. The circuit can be extended to more competitors...
This basic circuit can be used in signal followers and other applications where an RF signal is to be...
This circuit trips when the input voltage exceeds 30 V. Its base is a DIAC and it can be used to...