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There are numerous 5V addressable LED strips available that can be easily controlled by an Arduino via USB commands. That is the direction I would go.
Cheap DIY Ambientlight using Arduino
DIY Lead Acid Battery Charger
After a LOT of searching, I found these two motors at surplus center. I'll have to gear down the final drive speed, but they are cheap and have so much maximum torque that they'll have plenty of reserves for bumpier ground. As a bonus, their form factor should hide well inside a horse leg.http://www.surpluscenter.com/Electric-Motors/DC-Gearmotors/DC-Gearmotors/500-RPM-12-VDC-GEARMOTOR-5-1754.axd (8.5in-lbs@220rpm, @$9.99)http://www.surpluscenter.com/Electric-Motors/DC-Gearmotors/DC-Gearmotors/500-RPM-12-VOLT-DC-RIGHT-ANGLE-GEARMOTOR-5-1816.axd (16in-lbs@220rpm, @$14.99)
ESP8266 12e with GPS & OLED display
The pocket grill
The D-Bot, my self made reprap.
How to Make Playdough (Play-doh)
4-Way Panel Clamps
Heatless (cold) Toner Transfer for PCB making
Easy $5 Lightsabers
Oatmeal Chocolate Chip Cookies in a Jar
How to Make a Crappy Table saw Into a Good One
Lie Detector and Biofeedback Arduino Based
Severed Witches Finger Cookies
$2 vacuum sealer Life hack
IKEA HACK: articulating tablet mount
Build your own 3d printer filament factory (Filament Extruder)
Motorized Ping Pong Ball Guns
Steel Etching and Marking from a DC Adapter
Disassembling a CD/DVD reader and reusing its parts
Poor Man's 3D Printer
Reupholstering a steering wheel
Homemade Sparklers for the 4th of July! - (Improvised Hand-Held Fireworks)
AC Powered White LED Circular Magnifier Work Lamp
Despicable Me Minion Valentines Day Box
Make a kitchen knife out of an old circular saw blade!
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