One of the most popular 5.6mm diode houseings used by the laser hobbyist is the AixiZ laser module. I thought that not everyone is able to make a nice case for such a laser based on the aixiz module, but maybe he/she have/has a 3d printer, so I designed in FreeCAD a case for such a laser that has a hole for the aixiz module, a hole for a switch, a place for 2 AAA batteries and it is closed with 4 bolts. Today I published it on Thingiverse- https://www.thingiverse.com/thing:4658946. I hope that I helped someone in making the laser housing. if any of you want such a housing, but for example for a 18650 battery, please write a message under this post and I will try to design it.
Rich

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