Trekking pole smartphone mount / selfie stick
thingiverse
Use a rubber band to hold your smartphone in place and prevent it from sliding around. Before printing, edit the dimensions of p3_smartphone to match your smartphone's size: 65.8mm wide and 8.4mm long is a good starting point, which fits perfectly on the 2017 Samsung A3 model. The wrench size for p4_knob is M5, equivalent to 8mm in diameter. Let me know if this setup works out for you.
Download Model from thingiverse
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