Laser Edge Finder

I found a pack of #7 o-rings (1/2’ OD x 3/8’ ID) in the plumbing section at Home Depot and one o-ring allows the lens to snug up perfectly to the laser tube.

Also I forgot to mention that the laser works fine using the power from a USB charger, just clipped the small end off a usb charging cable and connected the red and black wires.

2 Likes