If you’re reading Hackaday, there’s a good chance you had a rock tumbler in your younger days. Hell, we’d put odds on a few of you having one rumbling away in the background as you read this.

At the suggestion of friends, [VegOilGuy] decided it was time to invest in a vibration tumbler. Naturally, building it rather than buying it was the order of the day. If you’ve ever used an ...