Magnatron Toy Robot

Youtube video: https://youtu.be/GLHP774KPwU

This is a retro toy robot that was inspired by the Magnor robot Robothut showed on his Youtube channel. The Magnor had non-concentric wheels that gave the appearance of a walking motion . It also had an arm that extended periodically that prevented one wheel from making contact with the ground causing the toy to turn. I'll leave a link to Robothuts video. My version also has these features. It is not a scale version of the Magnor but has most of it's features.

Robothut Magnor video: https://youtu.be/KRZ0QUXfD7Y?si=KmQWEfOkRXRuAstK

The wheels are driven directly from the TT motor. The mounting hole for each wheel is slightly off center causing a rocking motion. A 40 tooth gear is driven by a 13 tooth gear that is made onto the wheel. A cam is driven by the 40 tooth gear. The cam pushes an arm down to prevent one of the wheels from touching the ground. So the toy moves forward about 3 turns of the wheels and then pivots before returning to forward motion. The robot is pretty simple to build. It is driven by a blue all metal gear TT motor and powered by 2 AA batteries. You can put in 2 red leds to illuminate the eyes if you want. I wired the leds in parallel and put a 47 Ohm current limiting resistor in the positive voltage line that supplies them. The tires are made from O-rings from a Harbor Freight O-ring kit. The screws are 3mm of various lengths.

The 3mf file is a Bambu Studio project file.

Parts used:

power switch 19mm between screw hole centers https://www.amazon.com/dp/B008DFYHV2

screws 3mm Hex Socket Button Head Cap of various lengths https://www.amazon.com/dp/B08LVT7Y8R

blue TT motor dual shaft metal gears https://www.amazon.com/10Pcs-Metal-Motor-3V-6V-Ratio/dp/B0DZLTH3G7/ref=sr_1_1?s=industrial

AA battery box https://www.amazon.com/WAYLLSHINE-2Pcs-Battery-Holder-Leads/dp/B09V7Z4MT7/ref=sr_1_4

O rings for tires 216/G30 from Harbor Freight O-ring kit ID = 29.4MM / OD = 35.6MM / Section = 3.1MM

Category: Mechanical Toys