Get smart curated videos delivered to your inbox.   SUBSCRIBE
The Kid Should See This

A 3D printed mechanical laser show machine

Engineer, maker, and 3D printing enthusiast Evan Stanford has created a 3D printed, hand-cranked mechanical laser show machine that ‘draws’ with projected light. The drawn shapes are created with two rotating cams that combine to repetitively determine a laser pointer’s light path over 35 points. When the cams rotate quickly—according to Stanford “around five times a second or faster” works best—the entire shape can be seen.


In the video above, he reviews the math that went into mapping the cam shapes. You can also download the open source files to print your own.

Related reading: Cartesian coordinate system and trigonometry.

Related vids: Boy gets prosthetic hand made by 3-D printer, a 3D-printed candy sorting machine, Creating The Never-Ending Bloom: John Edmark’s spiral geometries, more 3D printing, and more math.

via Boing Boing.

This Webby award-winning video collection exists to help teachers, librarians, and families spark kid wonder and curiosity. TKSST features smarter, more meaningful content than what's usually served up by YouTube's algorithms, and amplifies the creators who make that content.

Curated, kid-friendly, independently-published. Support this mission by becoming a sustaining member today.

🌈 Watch these videos next...

Reincarnation by Chie Miyazaki

Rion Nakaya

A Sisyphus kinetic sculpture made with LEGO

Rion Nakaya

Claudia Bueno’s Yellowstone-inspired line and light installation

Rion Nakaya

Cycling, a LEGO Technic creation by Yoshihito Isogawa

Rion Nakaya

3D printing ‘hyperelastic bone’ to mend injuries

Rion Nakaya

How the differential gear works and why we need them in our cars

Rion Nakaya

Pizza physics (New York-style)

Rion Nakaya

Gears of all shapes: square, oval, pentagonal, organic & more

Rion Nakaya