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Office M&M Dispenser Maze - Short Version

Peanut M&M Dispenser Maze

Compared to the longer version, I have removed some repeated scenes and eliminated the future outlook section in favor of brevity. The video provides shorter overview of my M&M dispenser project, which was made to compete with other candy dispensers around our office (M&M, mint, and jellybeans). My goal was to make a dispenser that was somewhat more entertaining than reaching into a jar, but also reduces the large M&M flux caused by greedy handfuls.

The dispenser maze requires the prospect candy-eater to tilt the maze table and guide the M&M through the sequence to the Win Bucket. There are a number of open wall segments on the maze, beyond which lie the fail ramps that roll the M&M down to the fail bucket. While the M&Ms are still accessible in the fail bucket, candy-eaters must face public scorn and shunning from colleagues if they eat from there.

The maze is made up mostly of thin plywood glued together. The actual M&M dispenser is commercially available, with the only necessary modification being the servo-actuated arm.

Control of the maze is provided by a hand-held controller, which uses 8-bit Nintendo POWER/RESET buttons for M&M dropping, and an analog Playstation joystick for table tilting. An ATTiny 861 microcontroller reads the analog position of the joystick and generates PWM commands to drive the pitch and roll tilt servos, which are connected to the table and provide roughly +/- 10 deg tilt angle.

The maze is similar to the board game "Labyrinth".

The longer version of the video ends with a brief discussion of ongoing efforts, which could include:
- Additional/Swappable Levels
- Dynamic Maze Elements
- Turbulent Disturbances
- Autonomous Maze Navigation

Sources for the main components are:
- Playstation Joystick: Sparkfun.com
- 8-bit NES buttons and Box: All Electronics
- $3 Servos: Hobby King
- Dispenser: eBay (used)
- ATTiny MCU: Shifted Dynamics

Music Credits:
- Shinrog: Flying Away [Remix] - F-777
- Skymarshall - Forever Gamer

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Mighty Machines - Season 02 Episode 04 - At the Sawmill

Sawmills seem to have existed in the medieval period, as one was sketched by Villard de Honnecourt in c.1250.[2] On the other hand people think they were introduced to Madeira following its discovery in c.1420 and spread widely in Europe in the 16th century.[3]\r
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The Dutchman Cornelis Corneliszoon (1550-1607) invented his type of sawmill by applying a pitman arm onto a wind mill, which converted a turning motion into an up-an-down motion. Corneliszoon patented the sawmill on December 15, 1593 and the pitman on December 6, 1597. He built the first sawmill there in 1594.\r
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Before to the invention of the sawmill, boards were sawn by two men with a whipsaw, using saddleblocks to hold the log, and a pit for the pitman who worked below. Sawing was slow, and required strong and enduring men. The topsawer had to be the stronger of the two because the saw was pulled in turn by each man, and the lower had the advantage of gravity. The topsawyer also had to guide the saw so that the board was of even thickness. This was often done by following a chalkline.\r
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Early sawmills simply adapted the whipsaw to mechanical power, generally driven by a water wheel to speed up the process. The circular motion of the wheel was changed to back-and-forth motion of the saw blade by a Connecting rod known as a pitman (thus introducing a term used in many mechanical applications). A pitman is similar to a crankshaft, but in reverse; a crankshaft converts back-and-forth motion to circular motion.\r
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Generally, only the saw was powered, and the logs had to be loaded and moved by hand. An early improvement was the development of a movable carriage, also water powered, to steadily move the log through the saw blade.\r
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A small mill such as this would be the center of many rural communities in wood-exporting regions such as the Baltic countries and Canada. The output of such mills would be quite low, perhaps only 500 boards per day. They would also generally only operate during the winter, the peak logging season.

Ver video "Mighty Machines - Season 02 Episode 04 - At the Sawmill"