{"content":[{"type":"text","text":"5V laser pointer"}]}

大山

5V laser pointer

{"content":[{"type":"text","text":"5V laser pointer "}]}

{"content":[{"type":"text","text":"An interesting homemade laser emitter"}]}

{"content":[{"type":"text","text":"TT Motor (a common small gearmotor used in robotics)"}]}

{"content":[{"type":"text","text":"Simple Battery Holder "}]}

"When I first got my hands on my 3D printer, I taught myself modeling software and cranked out my very first creation from scratch."