@▷ Wire loop alarm with 2N700 | Diagram for Schematic

Wire loop alarm with 2N700

Here is the circuit diagram of a very simple wire loop alarm based on a N-channel enhancement FET 2N700, a buzzer and few passive components.In normal condition the gate of 2N700 (Q1) is connected to the ground through a 100K resistor (R2) and the wire loop. When the wire loop is broken , Q1 will be biased to ON state and the buzzer is activated.The circuit consumes very less standyby current and so the battery will last for a very long period of time.

Read more: http://www.circuitstoday.com/category/security-saftey
Under Creative Commons License: Attribution

"Wire loop alarm with 2N700 Search Tags"
alarm system