Hand Held Laser Pointer 4.5v 3 x LR44
thingiverse
I like this design (https://www.thingiverse.com/thing:1275111) but the fitting was a bit small for my laser diode and flimsy, and since I had these battery contacts I decided to make a beefier version with slots for the contacts A remix of https://www.thingiverse.com/thing:1275111 1 650nm 5mW 3-5V Module Diode w/ driver (cylinder housing is 12mm) 1 momentary push button switch (7mm) 2 positive battery spring contacts (suitable for AA and AAA batteries) 3 LR44 / AG13 batteries
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