Lately, somebody started stealing from us. Took us time to figure it out. At first we thought things got lost. When they took a gas tank, it became obvious ;). As far as I know, it ain't over and it's no game. It's a lousy perimeter to defend, especially for old hippies who moved to the land of smiles because they got tired of saying "perimeter"[1].
This is a generic Arduino sketch that lets you whip up a simple and friendly alarm system from whatever sensors and controllers you've got lying around in cat-infested shoe boxes.
- A sensor (PIR motion detector, magnetic door switch, weight sensor, etc.).
- A controller (hidden button, keypad, RFID reader, etc.) to temporarily disable ("chill") the system.
- A noisy device (buzzer, ghetto-blaster, tennis ball cannon aimed at a gong, GSM modem for sending SMS, etc.).
- A LED.