SearchH015 Sentry Parts List

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Major Components

See details for the major components:

• Antennae - there are 3 antennae on the top
• Head
• Black neck ring - this contains LEDs on some sides. The blue one is "front" on the movie droid for operator reference.
• Body
• Skirt
• Faux wheels - each corner has a small black 88.9mm diameter ball pretending to be wheels. In practice they sit a few mm above the floor.
• Lego Greebles! - Yes, Lego! The bottom black details were created from Lego, then molded and cast in lightweight resin. Each of the 4 sides is theoretically identical, though I notice the seems in the corners don't fit perfectly on the movie model.
• Holonomic drive - the movie droid has 4 omniwheels arranged so that it can rotate in place and move in any direction. Allows interesting movement and makes it fun to drive.

Electronics

• 5 LEDs, RGB addressable WS2812 style (or similar)
• Arduino (most any version, I'm using Leonardo compatible)
• 4 Pololu Simple Motor Controllers | SMC G2 18v15 suggested (or similar)
• 4 Motors (Eg: 37D 12V, | Pololu 30:1 Metal Gearmotor 37Dx52L mm is one option)
• Standard RC Receiver (& transmitter)
• 12V Battery
• Miscellaneous connection wire

Omniwheel Hardware

The motors mentioned above have to connect to the wheels. There may be a better way to do this than the parts kresty used:

• 4 Omniwheels 4" or 100mm - Shawn used VEX 276-2185
• 4 Square Shafts for Omniwheels, 2" long is OK (if using the VEX omnis)
• 4 Couplers (connect square shaft to 47D shaft)
• 8 Bearings (for square shaft, I used standard 608 bearings and printed spacers)