This simple laser mount is a really great way to hold a common laser pointer in place and also serves as a hands-free switch with push button devices.
Perfect for this tripwire project or any other where you require a mount for a laser or small flash light. I hope my accidental discovery helps you with your projects.
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Step 1: Parts
Cable Tidy/Keeper - 6 pack $4
Laser Pointer - $2
(Max 10mm barrel diameter)
Step 2: Construct
Push the laser into the cable tidy clasp making sure the buttons are facing up and the laser activation button is aligned with the tip of the clasp.
Step 3: Activate
Now simply twisting the pointer forces the push button under the clasp and switches on the laser diode.