SKU: 15441799400

Pololu TReX Jr Dual Motor Controller DMC02

Sale price$38.43 Regular price$42.70
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Description

Pololu TReX Jr Dual Motor Controller DMC02This lower power, smaller, and lower cost version of the TReX is the ultimate general purpose motor controller for small motors: it has a wide operating range (5 to 24 V), delivers 2. 5 A continuously per motor, provides current sensing on the two main channels, and it features the TReX triple interface that allows you to control motors from a serial line (RS 232 or TTL), radio control (RC) receiver, or analog voltage source such as a potentiometer. A

This lower-power, smaller, and lower-cost version of the TReX is the ultimate general-purpose motor controller for small motors: it has a wide operating range (5 to 24 V), delivers 2.5 A continuously per motor, provides current sensing on the two main channels, and it features the TReX triple interface that allows you to control motors from a serial line (RS-232 or TTL), radio control (RC) receiver, or analog voltage source such as a potentiometer.

A novel blend of serial, RC, and analog motor control
The TReX Jr Dual Motor Controller, a lower-power version of the TReX Dual Motor Controller, is a versatile DC motor controller designed to seamlessly blend autonomous and human control of small robots. The TReX Jr can control two bidirectional and one unidirectional motor via three independent control interfaces: radio control (RC) servo pulses, analog voltage, and asynchronous serial (RS-232 or TTL). Using the compact MC33887 motor driver allows for a single-board design that reduces cost while maintaining a small package. As an added benefit, the use of the MC33887 motor driver allows operation to 24 V.

The TReX Jr uses five input channels to receive the RC or analog control signals. When operating in RC or analog mode, the five channels function as follows:

  • Channel 1: motor 1 speed and direction or, if in mix mode, turn left/right
  • Channel 2: motor 2 speed and direction or, if in mix mode, go forward/reverse
  • Channel 3: auxiliary (unidirectional) motor speed
  • Channel 4: can be used to enable “flipped mode”, which allows invertable robots to be controlled as normal when they are inverted
  • Channel 5: determines whether the motors are controlled by the channel inputs or the serial interface; this channel allows you to switch between autonomous and human control at will


The serial interface can switch instantly with one of the other two interfaces, allowing mixed autonomous and remote control. For example, a robot could be configured to run autonomously most of the time, but a human operator could override the autonomous function if the robot gets stuck or into a dangerous situation. If the serial mode is selected as the primary interface, high-resolution measurements of all five channel input signals (be they RC pulses or analog voltages) are made available to the autonomous robot controller, allowing for complex and unlimited mixing of operator control and sensor input. For example, the TReX would be a great motor controller for a remotely controlled balancing robot.

Technical specifications

  • Dimensions 1.75" x 1.75" x 0.5" (0.3" height without connectors)
  • Supply voltage 5 - 24 V
  • Primary motor outputs 2 bidirectional, 5 A peak, up to 2.5 A continuous (may be combined to control 1 bidirectional, 5 A continuous)
  • Auxiliary output 1 unidirectional, 10 A continuous
  • Speed control 128 steps in each direction
  • Control interfaces RC servo pulses, analog voltages, or serial commands; master interface set by mode-select jumper
  • Input channels 5 (RC servo pulses or analog voltages)
  • RC pulse measurements 12-bit resolution, 1 us accuracy
  • Analog measurements 10-bit resolution
  • Serial interface both RS-232 and TTL (logic level), bidirectional
  • Baud rates supports 11 common baud rates ranging from 1200 to 115,200 bps
  • Expanded protocol Allows multiple Pololu servo and motor controllers on one serial line
  • Compact protocol Allows both motors 1 and 2 to be simultaneously set with just three bytes


Documents


Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 15441799400

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hpannell
Phoenix, US
★★★★★ 5
Hate the Price, but love the ink.
Style: Ink
I totally hate the price of printer ink, mostly when it dries out when not in constant use, but I purchased generic and my printer would not let me use it and i have avoided the firmware update. So back to buying epson ink. It worked the minute i loaded it into the printer. Epson ink is great. it was great color and quality. Just hate the price tag.
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Reviewed in the United States on January 29, 2026
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Allon Swift
Fort Morgan, US
★★★★★ 4
Pricey but they work
Style: Ink
Pricey but the remanufactured ones either don't work at all, or they work for a short time then go belly up...
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Reviewed in the United States on April 11, 2026
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Nathan Mcnealy
Natrona Heights, US
★★★★★ 5
Run out of ink quickly
Style: Ink
When you have the Epson work Workforce Pro 3820 it only accepts Epson cartridges none of the cheaper ones Epson cartridges run out of ink really fast I actually had some of the non-epson brand cartridges in there they worked a couple of times but then one day they absolutely refuse to work so they're worthless and then I had to actually buy the Epson brand name
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Reviewed in the United States on April 2, 2026
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Sheynnb
Belleville, US
★★★★★ 5
Works Well
Style: Ink
Perfect replacement. Good quality, acceptable value.
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Reviewed in the United States on March 23, 2026
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FF
Bozeman, US
★★★★★ 5
Good value!
Style: Ink
Received in a timely manner. Installed with ease. Only printed a few pages but all is good so far. Price is more than I would like but very competitive and attractive compared to local office supply stores.
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Reviewed in the United States on April 16, 2026

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