YouTube Link: https://www.youtube.com/watch?v=9tXILSS19Ps&feature=youtu.be

These files turn your hand coffee grinder into a high dollar electric burr grinder. The source code of these files are intended to work with a wide range of hand grinder and motor combinations. This project is most economical if you already have your own hand powered grinder. The components are easy to come by, I already had an old power supply and motor that was just laying around. If you do not have these items already, you will need to purchase:

• Hand powered coffee grinder
• 12v planetary motor (100 RPM)
• 12v power supply (preferably with a switch)
• 2X M4 x 20mm cap bolts @ 2X M4 nuts 

All items can be found on amazon:

https://www.amazon.com/Greartisan-Electric-Reduction-Centric-Diameter/dp/B072R57C56/ref=sr_1_2?crid=SCDVJG367HEE&keywords=100+rpm+gear+motor&qid=1575956492&sprefix=100+rpm+%2Caps%2C505&sr=8-2

https://www.amazon.com/FIT-POWER-Supply-Adapter-Wireless-Switches/dp/B078R93PSY/ref=sr_1_2?crid=2ML8Z9S1FCYRM&keywords=12v+power+supply+with+switch&qid=1575956523&sprefix=12v+power+supply+with+s%2Caps%2C270&sr=8-2

https://www.amazon.com/JavaPresse-Grinder-Conical-Brushed-Stainless/dp/B013R3Q7B2/ref=sr_1_1_sspa?keywords=hand+coffee+grinder&qid=1575956555&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyMVdHUUFaVDQzN0hDJmVuY3J5cHRlZElkPUEwOTIyOTU1WkVHV1dZUThLMUZPJmVuY3J5cHRlZEFkSWQ9QTA4MDQzMTQzSFZIVFpVQVRFVVVVJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==