How I built a Mechanical Calculator
17:10
I'm Developing a New Circuit Board Manufacturing Technology
22:42
About Time I Made a Clock
1:16:39
The Curta Calculator (full documentary) Review / How To
20:40
Mini Giant Marble Clock that tells the time using marbles - Still too big
15:08
Watchmaking: Machining a Watch Gear
17:35
Building a Relay-Powered Pi Machine
27:55
I built an Omni-Directional Ball-Wheeled Bike
13:13