Luggage Security Alarm SchematicWe usually lock our luggage utilizing a chain-and-lock arrangement when in travelling by a train of bus. But, still we are worried, apprehending that someone may possibly break the chain and steal our luggage. The following schematic is really a very simple and easy build luggage security alarm circuit to ...
Safer Security Alarm diagramThis is not an original security system alarm circuit. The circuit which use three output switch connections, claimed to be safer system alarm than other alarm circuits. Schematic Diagram: A Many security systems use a closed loop of wires and switches arranged so that whenever a door or window is ...
Miniature Loop Alarm circuitThis is a very simple and cheap alarm which require very small power consumption, you may use 9V battery to run this circuit. It uses two transistors to drive the buzzer. The buzzer will sound until you turn the whole circuit off or connect the wire loop back to the ...
Five Zone Alarm schematic diagramHere the five zone alarm schematic diagram (click the schematic for larger size): The circuit uses just 3 CMOS IC's and features a timed entry / exit zone, 4 immediate zones and a panic button. There are indicators for each zone a "system armed" indicator. Each zone uses a normally ...
Car Alarm and Immobilizer circuitDo not let thieves steal your car. Secure your car when you leave your favorite car. This circuit is designed to secure your car, of course with little cost if you build it yourself. Much cheaper than buying a car alarm device that is already on the market. The alarm ...