How-To Geek

Activate Your Monitor via Motion Trigger

Most people are in the habit of jiggling their mouse or tapping their keyboard when they want to wake their monitor. This clever electronics hack adds a sensor to your computer for motion-based monitor activation.

At the DIY and electronics blog Radio Etcetera they tackled an interesting project and shared the build guide. Their local volunteer fire department needed a monitor on for quick information checks but they didn’t need it on all the time and they didn’t want to have to walk over and activate the monitor when they needed it. The solution involved hacking a simple infrared security sensor and wiring it via USB to send a mouse command when motion is detected in the room. Fire fighter walks in, monitor turns on and displays information; fire fighter leaves and the monitor goes back to sleep.

Hit up the link below to see additional photos, schematics, and the complete build guide.

Motion Activated PC Monitor [Radio Etcetera via Hack A Day]

Jason Fitzpatrick is a warranty-voiding DIYer who spends his days cracking opening cases and wrestling with code so you don't have to. If it can be modded, optimized, repurposed, or torn apart for fun he's interested (and probably already at the workbench taking it apart). You can follow him on if you'd like.

  • Published 02/22/11

Comments (3)

  1. Merlin

    Interesting piece of hardware.
    But there allready exists a very small app called mousejiggler that acts as if the user continuously jiggles the mouse. You can even have the app do so without actualy moving the mousepointer.
    You can find it at:

  2. Taz

    One of the cheapest and easiest ones I’ve found is to use a watch with a second hand.
    Place it on the desk (face up of course)with your mouse’s laser resting on the watch face.
    The second hand’s movement will be enough to move the mouse pointer in a small circle therefore solving your problem.

  3. christian

    @merlin, @taz
    The easiest solution is to turn off monitor standby. But this is not the solution for the described problem.
    The guys wanted to see the screen when they are in the room and they wanted the screen to be in standby when they are outside the room…

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