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Saturday, March 12, 2011

Arduino security with Lasers and High Speed Photography

Arduino security with frickin’ laser

posted Jan 3rd 2010 9:00am by Mike Szczys
filed under: arduino hacks, laser hacks, security hacks

[over9k] used his Arduino to set up a laser trip wire. The laser is mounted along side the Arduino, reflects off of a mirror, and shines on a photoresistor that interfaces via a voltage divider. The signal from the voltage divider is monitored for a change when the laser beam is broken. [over9k] set things up so that a webcam snaps a picture of the intruder and Twitters the event for easy notification. Video after the break walks through each of these steps.

This build is a bit rough around the edges but unlike other laser trip wires this keeps all the electronics in one place. The laser interface could be a bit more eloquent, and we’re wondering just how much current it is pulling off of the Arduino pins. But if you’re bored and have this stuff on hand it will be fun to play around with it.

Twittering Laser Tripwire with Webcam Capture

Video Link...

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Laser triggered photography

posted Sep 30th 2009 6:30am by Jakob Griffith
filed under: digital cameras hacks, laser hacks


Popped balloons or bullets fired into apples, anyone can photograph with a quick sound based camera rig. Lasers have been used forever in motion detection. And even door bell chimes have been used before for remote camera shutter releases. No, [SaskView] wanted to go further and created his Laser Triggered High-Speed Photography setup, to photograph (of all things) milk splashes. We liked the simplicity of the project however;  requiring no programmed microchips or overly complicated circuitry – rather he took a quick trip to the local dollar shop, used the amazing CHDK firmware, and he produced perfect results every time.

[Update: CHDK, not CHKD firmware. My mind must be elsewhere. Thanks jbot and agent smith]

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Go there...

Arduino security with Lasers and High Speed Photography
Arduino security with frickin’ laser - Hack a Day
Twittering Laser Tripwire with Webcam Capture
YouTube - Twittering Laser Tripwire with Webcam Capture
Laser triggered photography - Hack a Day
High speed photography - Hack a Day
Laser Dance Pad - Hack a Day
Remote shutter release doorbell - Hack a Day
Laser Triggered High-Speed Photography
How-To: Expand your camera with CHDK - Hack a Day
xkcd: Charity


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