SKU: 15441799400

Pololu TReX Jr Dual Motor Controller DMC02

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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:
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  • 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]
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SKU: 15441799400

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Kathy Sweatmon
Pawtucket, US
★★★★★ 5
Good product
Color: Black, Size: Medium
It is as described, looks neat and tidy on the sink. Just big enough to do what I need it to do. My sink stays dry because the wate goes back int the sink.
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Reviewed in the United States on February 14, 2026
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Ethel White
Louisville, US
★★★★★ 5
Quality is good.
Color: Black, Size: Medium
A product that works as promised.
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Reviewed in the United States on May 17, 2026
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Yaelita
Alexandria, US
★★★★★ 3
It is almost great.
Color: Black, Size: Medium
It is a nice sponge holder but the tray is not wide enough and it falls. Because it was the only one I found with a spout, I am keeping it, and figured a way to stick it so the tray doesn't fall. The other thing is that the tray is not sunken enough in the middle for all the water to be routed there, and the spout doesn't always get rid of all the water inside, so once in a few days, I have to manually press it down and more water comes out. The dishcloth rack is not great for cloths, they get wet. Other than that, it looks very nice, it is aesthetic, big enough for all my kitchen stuff, and makes my kitchen neater, so I like it.
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Reviewed in the United States on January 17, 2026
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Aprilfool
Waukegan, US
★★★★★ 4
Love this product very convenient
Color: Silver, Size: Medium
This was great to keep all my brushes, cloth, detergent and scrubby together and neat. I love the drainage and it looks clean. The only thing I don't care for is the bar that holds the cloth comes off all the time. Other than that it is great.
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Reviewed in the United States on March 30, 2026
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Dadhich Sawant
Whiting, US
★★★★★ 5
Nice Product
Color: 2 Tier-Black, Color: 2 Tier-Black
Super Handy and So Stylish — A Must-Have for Any Kitchen! I’m really impressed with the Sinnsally Kitchen Sponge Holder! It’s simple, practical, and makes keeping my sink area neat so much easier. The 2-tier design is brilliant — the top shelf holds my sponges perfectly, while the bottom area keeps scrubbers and brushes organized and easily accessible. The stainless steel looks sleek and modern, and it has held up beautifully with daily use. Water drains well so everything dries quickly, and cleanup is a breeze. No more soggy sponges sitting around! Installation was quick and easy — it fits nicely right by the sink without taking up too much space. This little holder has made a big difference in keeping my kitchen tidy. Highly recommend for anyone who wants a clean, organized sink area with a touch of style!
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Reviewed in the United States on March 3, 2026

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