This electronic defense generates a high voltage discharge capable of intimidating an attacker. The circuit was found in the Radio Electronics Experimenter magazine special edition of 1990.
This powerful alarm circuit was found in the July 1975 issue of Radio Electronics magazine. The...
In many applications involving control of circuits from the power grid, the zero-pass detector is a key...
In this circuit the LED remains on after pressing S, for a time that depends on the capacitor...