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This Video is part of Know How Laboratory of National Engineering College, Kovilpatti, Tamil Nadu India

減速機(Worm Gear & Chain)
3D Models：http://goo.gl/PL1F

Music by Ronan Hardiman.

This is a test of a rack and pinion mechanism for a retractable antenna.
STL files: https://www.thingiverse.com/thing:4619438
Code on GitHub: https://github.com/BipeFlyer/Antenna-on-Rack-and-Pinion

BOM:
Standard Size Continuous Rotation Servo. I modified…

Found on Google from www.maplesoft.com