This circuit was obtained in an American documentation from the 80's. The transistors can be equivalent to those indicated and the crystal can reach a few tens of megahertz.
We found this circuit in an old Linear Technology manual. It makes use of the LTC1329 and can be...
With this circuit, power cables can be detected by simply approaching PP. PP is an antenna or...
This protective circuit uses Shottky diodes on an International Rectifier PVI5033 and IRF7822...