I recently got my thumb reconstructed (due to Osteo arthritis). And my new cast felt like it could use an upgrade. Laser! I figure it will be a good addition to my mad scientist costume for Halloween. Chinese laser pointer from ebay or aliexpress (don’t remember, I have a drawer full of laser modules). Adafruit powerboost 500 basic (If I’d had the full one, it could charge too, but this is what I had lying around). I designed a very basic platform in OpenSCAD, and stuck the board down with mounting tape. The enable switch is soldered directly to the board (I cut off one of the terminals.)
Both the laser platform and the activation button are mounted with Velcro (the cast is coming off…) the button is superglued to the disk that holds the velcro dot.
If you want to make it, it’s very likely that your laser module will be sized differently so edit the openSCAD file to fit.
3D printed circle the same size as a velcro dot