Pololu TReX Jr Dual Motor Controller DMC02

Documentation and other information

• 

  Pololu TReX Jr User’s Guide (Printable PDF)

  User’s guide for the Pololu TReX Jr motor controller
• 

  Sample C# Program for Communicating with the TReX and TReX Jr (Printable PDF)

  This sample C# program (written for Microsoft Visual C# 2008) shows how you can use your computer to send and receive data from the TReX and TReX Jr motor controllers.

File downloads

• TReX Configurator utility for Windows version 100608 (295k zip)

  If you have the ability to connect your TReX to a computer (via serial port or USB-to-serial adapter), you can use this program to monitor the channel inputs, control the motor drivers, and configure its various settings. This version supports TReX and TReX Jr firmware versions 1.3 and below. Please manually uninstall older versions of the TReX Configurator before installing this version.

• TReX Jr command documentation (100k pdf)

• TReX Jr configuration parameter documentation (125k pdf)

• TReX Jr (DMC02) Firmware version 1.2 (161k trx)

  This firmware fixes a bug that affected the 38,400 and 28,800 bps baud rates, and it adds a configuration parameter that lets you optionally insert a 1 ms delay between the last byte of a received command packet and the first byte of the TReX Jr’s transmitted response. Without this delay, slower controllers, such as the Basic Stamp, can miss the first byte of the TReX Jr’s response.

• MC33887 motor driver datasheet (1MB pdf)

• Drill guide for Pololu TReX Jr Dual Motor Controller DMC02 (85k dxf)

  This DXF drawing shows the locations of all of the board’s holes.

Recommended links

• Arduino example code for the TReX

  This Arduino sketch, written by forum member mwomack, sets up a serial interface between the TReX and an Arduino and sends three basic data-query commands: “Get Signature”, “Get Mode”, and “Does Serial Control Motors?”. It can be used as a template for implementing additional commands.

• More Arduino example code for the TReX

  This Arduino sketch, written by forum member gcebiker, sets up a serial interface between the TReX and an Arduino and sends commands to drive motors in response to joystick inputs to the Arduino.

• Video of the RP5 Tracked Chassis Driven by the TReX Jr

  A video showing the RP5 Tracked Chassis as a radio-controlled platform driven by the Pololu TReX Jr motor controller.