Let's start with the parts list and schematic. Parts:
Arduino
(2) Hitec HS-311 servo motors (Amazon.com)
(1) Hitec HS-645MG servo motor (high torque)--Amazon.com
(1) mini Servo YKS SG90 (Amazon.com)
(1) Two channel remote control toy--I got a car for $11.99 at a local pharmacy
(3) 5 volt relays--Jameco.com #139977 (these are polarized so that positive voltage on one coil lead causes it to pick up, but the other polarity doesn't; you can produce the same result with a 5 volt relay and a diode. Relays "B" and "C" only operate one at a time--based on the polarity provided.)
1/4" x 3 1/4" x .025 spring (available at Lowes)
(6) 12" servo extension cables
Spring from a ballpoint pen
4" lazy susan http://www.amazon.com/Capacity-Bearing-Turntable-Bearings-VXB/dp/B002TIKEQ6/ref=sr_1_2?ie=UTF8&qid=1372692771&sr=8-2&keywords=lazy+susan+4+inch
9 volt, 500 ma DC power supply
6 volt, 1 amp DC power supply
3D printed parts, design and print files at:
http://www.thingiverse.com/thing:110350
Wood, screws,paint, wire, jumpers
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