Zumo Robot for Arduino (Assembled with 75:1 HP Motors)

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Pololu item #: 2510
Brand: Pololu
Status: Active 
RoHS 3 compliant

The Zumo robot for Arduino is an Arduino-controllable tracked robot platform that is less than 10 cm × 10 cm—small enough to qualify for Mini Sumo. It includes two micro metal gearmotors coupled to a pair of silicone tracks, a stainless steel bulldozer-style blade, an array of six infrared reflectance sensors for line following or edge detection, a buzzer for simple sounds and music, and a 3-axis accelerometer, magnetometer, and gyro for detecting impacts and tracking orientation. Just add 4 AA batteries and an Arduino (or compatible controller) and you are ready to push! No soldering or assembly is required.


Zumo Robot for Arduino.

Zumo Robot for Arduino.

Zumo reflectance sensor array on a Zumo robot, bottom view.

Main features of the Zumo Shield for Arduino, v1.3.

Assembled Zumo Robot for Arduino, top view with labeled components.

Assembled Zumo Robot for Arduino with an Arduino Uno, back view.

Assembled Zumo Robot for Arduino with an Arduino-compatible A-Star 32U4 Prime LV.

A Zumo 32U4 robot (left) and a Zumo robot for Arduino with an A-Star 32U4 Prime LV (right).

New inertial sensors! As of 12 September 2020, we are transitioning to shipping this robot with the v1.3 version of the Zumo Shield. The main difference is the new version replaces the shield’s inertial sensors with an LSM6DS33 accelerometer and gyro and an LIS3MDL magnetometer, as the LSM303D accelerometer and magnetometer used on the original revision has been discontinued. You can use our updated Zumo Shield Arduino library to help you write code that will work with the inertial sensors on either revision. In addition, the power switch and pushbuttons on the v1.3 shield have been changed to be surface-mount parts. For more information, see the user’s guide.

Please note that you might receive either version during this transition period. If you require a specific version, please contact us before you place your order.


A Zumo robot preparing to attack a Parallax SumoBot.

Zumo Robot for Arduino, v1.2.

This Zumo robot is a low-profile tracked robot platform intended for use with an Arduino (or compatible device, such as an A-Star 32U4 Prime) as its main controller. It measures less than 10 cm on each side and weighs approximately 300 g with an Arduino Uno and batteries (165 g without, as shipped), so it is both small enough and light enough to qualify for Mini-Sumo competitions. It uses two 75:1 HP micro metal gearmotors to drive the treads, providing plenty of torque and a top speed of approximately 2 feet per second (60 cm/s), which makes it much more agile than competing robots like the Solarbotics Sumovore and Parallax SumoBot while still offering plenty of control. The Zumo robot includes a 0.036"-thick laser-cut stainless steel sumo blade mounted to the front of the chassis for pushing around objects like other robots, and a reflectance sensor array mounted along the front edge of the Zumo (behind the sumo blade) allows the Zumo to detect features on the ground in front of it, such as lines for following or edges for avoiding.

The Zumo control board is essentially a shield for the A-Star 32U4 Prime, Arduino Uno or Arduino Leonardo, each of which can be plugged directly into the shield’s male header pins, face down. (It is not compatible with the Arduino Mega or Due, but it can be used with older Arduinos that have the same form factor as the Uno, such as the Duemilanove.) The shield includes dual motor drivers, a buzzer for playing simple sounds and music, a user pushbutton, and a 3-axis accelerometer, compass, and gyroscope for sensing impacts and tracking orientation. It also boosts the battery voltage to power the Arduino and breaks out the Arduino I/O lines, reset button, and user LED for convenient access and to accommodate additional sensors.

Our Zumo Arduino libraries make it easy to interface with all of the integrated hardware, and we provide a number of sample programs that show how to use the Zumo’s reflectance array, pushbutton, buzzer, and motors.

The robot ships as shown in the main product picture; no assembly or soldering is required. An appropriate Arduino (or compatible controller) and four AA batteries are required but not included.

July 10, 2015 update: This robot now features black, spoked sprockets (see the main product picture) in place of the original white ones (which can still be seen in some of the pictures on this page).


Required accessories (not included)

Arduino R3, top view.

Optional accessories

A variety of Sharp distance sensors.

Zumo 32U4 robot with black sprockets.

Zumo 32U4 robot with red sprockets.

Zumo 32U4 robot with white sprockets.

Also available as a kit

For those interested in soldering and assembling their own Zumo, the Zumo Robot Kit for Arduino contains the parts necessary to assemble your own Zumo robot, but allows you to select a different gear ratio micro metal gearmotor to make your Zumo faster or stronger. Note that unlike the assembled version, the kit does not include a Zumo reflectance sensor array.

Contents of the Zumo robot kit for Arduino, v1.2.

Comparison with the Zumo 32U4 robot

The newer Zumo 32U4 is another robot based on the Zumo chassis. It is a more highly integrated robot than the Zumo robot for Arduino, with enhancements that include a built-in Arduino-compatible ATmega32U4 microcontroller (the same one used in the Arduino Leonardo and A-Star 32U4 boards), an LCD, encoders for closed-loop motor control, and proximity sensors for obstacle detection. The Zumo 32U4 main board effectively combines the functions of the Zumo Shield and the separate Arduino controller into a single, compact board that is just as easy to program as a standard Arduino or A-Star thanks to its USB interface and preloaded Arduino-compatible bootloader.

A Zumo 32U4 robot (left) and a Zumo robot for Arduino with an A-Star 32U4 Prime LV (right).

Some of the pin mappings and software libraries differ between the Zumo 32U4 and Zumo robot for Arduino, so programs written for one robot generally need to be modified to work on the other.


Size: 98mm × 98mm × 39mm1
Weight: 165 g2


with an Arduino Uno.
without batteries and an Arduino (~300 g with batteries and an Arduino Uno).

Documentation and other information

File downloads

Recommended links

Frequently-asked questions

Why are the accelerometer readings from my LSM303D stuck at an incorrect value?

We have noticed that the accelerometer in the LSM303D is particularly sensitive to brown-out conditions. If power is removed and the voltage on the 3.3 V power supply line falls significantly, but is not allowed to drop completely to 0 V, the accelerometer can be put into a bad state. When power is reapplied to the LSM303D, the accelerometer then returns readings on some or all axes that are large values and do not change much or at all. (We have often seen readings like -32760 and 24539.)

To prevent this problem from occurring, the voltage on the 3.3 V line must be allowed to fall to about 0 V when power is removed from the LSM303D. Depending on other loads and the amount of capacitance on the 3.3 V line, it can take up to several seconds for this to happen, meaning that you should avoid interrupting power to the LSM303D for any shorter period, and if such a short interruption does occur, you should remove power again for a longer period to allow the accelerometer to reset properly.

If the voltage takes too long to fall, you can add a resistor between 3.3 V and ground (a “bleeder resistor”) to discharge the 3.3 V line more quickly when power is removed. We suggest trying a resistor in the 1 kΩ to 10 kΩ range. (Note that a stronger bleeder resistor will cause the voltage to fall more quickly when power is removed, but it will also waste more power when the supply is present.)

The Zumo 32U4 includes a bleeder resistor on the 3.3 V line.

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