The LightRobot is a 3pi Robot that has been modified with RGB LEDs, an RN-41 Bluetooth module, and a sonar range finder that is controlled with voice commands and the accelerometer from an Android phone. The source code for the robot and the Android app are also available on the project’s GitHub page.

Featured link: http://www.youtube.com/watch?v=hJi5qhOgbXw

This text-enabled espresso machine uses the Zipwhip app to receive a text message for an order of espresso. An A4988 stepper motor driver carrier and servo are then used to rotate the cup up to the nozzles where the espresso is dispensed.

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A4988 Stepper Motor Driver Carrier

This blog post is a very detailed writeup of some A4988 stepper motor driver heatsinking experiments.

Featured link: http://arduinodabbler.wordpress.com/2012/07/13/heatsinking-a-pololu-a4988-a4983-stepper-driver/

This post in the Trossen Robotics Community forum shows a pair of Wixels are added to an Arbotix Commander V2 remote control, allowing it to send its signals to a computer. The author gives us a nice compliment:

Not to be a shill, but that was easier to set up than any MCU + Xbee configuration I’ve seen.

Featured link: http://forums.trossenrobotics.com/showthread.php?5558-Pololu-s-Wixel-Arbotix-Commander-V2

This autonomous, obstacle-avoiding robot is controlled by an Arduino and uses two 25D metal gearmotors, which are attached to a dual VNH2SP30 motor driver carrier.

This blog post by Steve Spence discusses using an ACS715 Current Sensor Carrier to monitor the current consumption of a ham radio when in emergency communication mode.

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ACS715 Current Sensor Carrier 0 to 30A

This laser-cut robotic arm is controlled by a Mini Maestro servo controller. By Szymon Kobalczyk, April 2012.

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Mini Maestro 12-Channel USB Servo Controller (Assembled)

This balancing robot by Kristian Lauszus uses two 37D metal gearmotors with encoders that are mounted with gearmotor brackets and driven with a dual VNH2SP30 motor driver carrier.

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	30:1 Metal Gearmotor 37Dx52L mm 12V with 64 CPR Encoder (No End Cap)
	Pololu Stamped Aluminum L-Bracket Pair for 37D mm Metal Gearmotors
	Dual VNH2SP30 Motor Driver Carrier MD03A

This CNC router features four of our A4988 stepper motor driver carriers. You can find more videos and information in this CNCzone forum post.

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A4988 Stepper Motor Driver Carrier with Voltage Regulators

Tabletop Robotics is a site with a series of interesting, customer-created open source projects for the 3pi robot, including barcode reading, grid navigation, and remote control.

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Pololu 3pi Robot