Spiral Marble Run with Motor (USB)
thingiverse
One more utterly pointless Marble Run Machine. Things you'll need: 1. A DC Motor with a 15rpm Gearwheel that runs on 3-5V. 2. A 2 Pin ON-OFF Switch. 3. Any power source, such as a USB charger. 4. Some wires. 5. (optional) Steel Balls with a diameter of 10 mm. 6. (optional) A 2 Pin Male-Female Connector. You can print Marbles on your printer instead of using Steel Balls. <iframe width="560" height="315" src="https://www.youtube.com/embed/YfiTbpwWWzI" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
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