Balboa 32U4 Balancing Robot Kit (No Motors or Wheels) View larger

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Balboa 32U4 Balancing Robot Kit (No Motors or Wheels)

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Build your very own programmable balancing robot with the Balboa 32U4 robot kit! The Balboa control board features an Arduino-compatible ATmega32U4 MCU, motor drivers, quadrature encoders, and a full IMU. This board also has the ability to interface with a Raspberry Pi, making the foundation for a complete Raspberry Pi-controlled balancing robot. Motors and wheels are not included: choose your wheels and motors to personalize your robot.


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Overview

The Balboa 32U4 is a small, user-programmable balancing robot based on the Arduino-compatible ATmega32U4 AVR microcontroller from Microchip (formerly Atmel) and featuring two H-bridge motor drivers, quadrature encoders for closed-loop motor control, a full inertial measurement unit (3-axis accelerometer, gyro, and magnetometer) for estimating orientation and balancing, and an optional interface for connecting a Raspberry Pi to make a Raspberry Pi-controlled balancing robot. The control board includes a powerful 5 V switching step-down regulator that can supply up to 2 A continuously, along with a versatile power-switching and distribution circuit. Three on-board pushbuttons offer a convenient interface for user input, while indicator LEDs, a buzzer, and a connector for an optional LCD (not included) allow the robot to provide feedback.


This is a kit; assembly (including soldering) is required. Motors and wheels are not included so you can choose your own to personalize your robot; see below for details. Balboa runs on six AA batteries (not included), and a USB A to Micro-B cable (not included) is required for programming.

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Like the Zumo 32U4 robot and A-Star 32U4 programmable controllers, which are based on the same microcontroller, Balboa 32U4 features a USB interface and ships preloaded with an Arduino-compatible bootloader. A software add-on is available that makes it easy to program the robot from the Arduino environment, and we have Arduino libraries and example sketches to help get you started. A USB A to Micro-B cable (not included) is required for programming. For those who want to customize or enhance their robots with additional peripherals, the robot’s power rails and microcontroller’s I/O lines can be accessed via 0.1"-spaced through-holes along the sides, front/top, and back/bottom of the control board.

The Balboa 32U4 control board can serve as the robot’s main controller, or it can act a base for a more powerful Raspberry Pi controller. With the addition of a 2x20 female header and standoffs (neither of which are included), a compatible Raspberry Pi (Model B+ or newer, including Pi 3 Model B+ and Model A+) can plug directly into the board. Integrated level shifters make it easy to set up I²C communication and interface other signals between the two controllers, and the control board automatically supplies 5 V power to an attached Raspberry Pi. In this setup, the Raspberry Pi can handle the high-level robot control while relying on the Balboa’s ATmega32U4 microcontroller for low-level tasks, like running motors, reading encoders, and interfacing with other analog or timing-sensitive devices.



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Balboa 32U4 Balancing Robot with 80x10mm wheels and a Raspberry Pi 1 Model A+.

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Balboa 32U4 Balancing Robot with 80x10mm wheels and a Raspberry Pi 3 Model B.

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Balboa 32U4 Balancing Robot with 80x10mm wheels and a Raspberry Pi Zero W.


For those who want to operate the Balboa as a traditional differential-drive robot oriented on its side, a Stability Conversion Kit is available separately. This accessory snaps onto the front end of the Balboa chassis to make it longer and holds an included ball caster, providing a low-friction third contact point. This add-on is also useful in balancing applications, where the ball caster can be left off and the extension piece can be used to make the Balboa taller and give it more mounting points. For those who want to supply their own electronics, see the Balboa Chassis with Stability Conversion Kit.

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Stability Conversion Kit for Balboa, bottom view.

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Balboa Chassis with Stability Conversion Kit and 80×10mm Pololu Wheels.

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One of the many possible configurations of the bumper cage on the Balboa 32U4 Balancing Robot (lengthened with Stability Conversion accessory).


The 5-Channel Reflectance Sensor Array for Balboa can mount directly to the Balboa 32U4 control board and provides an easy way to add line sensing to a balancing Balboa.

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5-Channel reflectance sensor array for Balboa in the edge-aligned mounting option.


Selecting motors and wheels

The Balboa uses two micro metal gearmotors to drive external 2-gear gearboxes that further increase the gear ratio and support the weight of the robot with ball bearings rather than the motor shafts themselves. The Balboa kit gives you five reduction options to choose from when assembling your robot (ranging from 1.64:1 to 2.88:1), and you can further customize the gear ratio based on which micro metal gearmotor you choose for your robot, which is why we do not include motors with the kit. The integrated quadrature encoders require gearmotors with extended motor shafts, and we specifically recommend the 30:1 HPCB, 50:1 HPCB, or 75:1 HPCB versions.

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A look inside the external gearbox on the Balboa 32U4 Balancing Robot.

We also do not include wheels with the kit since there are a number of options to choose from. We recommend 80x10mm Pololu wheels, which are available in five colors - black, red, yellow, blue, and white - but the larger 90x10mm wheels and smaller 70x8mm wheels are also options if you know what you are doing (note that the 70x8mm wheels only offer a few millimeters of clearance when balancing).

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Balboa 32U4 Balancing Robot with 70x8mm wheels.

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Balboa 32U4 Balancing Robot with 80x10mm wheels.

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Balboa 32U4 Balancing Robot with 90x10mm wheels.


Kit contents

With the exception of motors and wheels, this kit contains everything necessary to build a Balboa 32U4 balancing robot:

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Balboa 32U4 Balancing Robot Kit components (wheels and motors are not included).


All units sold after 19 May 2017 also include a bumper cage kit that can optionally be used to protect the robot from falls or as skids that the Balboa can rest on while driving around as an alternative to balancing:


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Bumper Cage Kit for Balboa 32U4 Balancing Robot.

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One of the many possible configurations of the bumper cage on the Balboa 32U4 Balancing Robot.

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One of the many possible configurations of the bumper cage on the Balboa 32U4 Balancing Robot.

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The Balboa 32U4 can drive around on its side while resting on the bumper cage skids.


See the Balboa 32U4 balancing robot user’s guide for detailed assembly instructions.


Dimensions

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Dimensions of the Balboa 32U4 Balancing Robot with 80×10mm wheels.


Protecting against falls

When you are using the Balboa as a balancing robot, it is important to protect the electronics from hard falls that could damage them. In general, we recommend running the Balboa on soft surfaces, such as carpet, and it helps to install the included bumper cage so that there is something to hit the ground before the electronics (see the pictures in the "Kit contents" section above). You can also make your own protective bumpers if you want, and the pictures below show two such home-made examples:

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Balboa 32U4 Balancing Robot with 80x10mm wheels and 3D-printed arms.

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Balboa 32U4 Balancing Robot with 80x10mm wheels and arms made from LEGO blocks.


We have made the arms in the left picture available on Thingiverse so those with access to 3D printers can print their own.


Specifications

Dimensions

Size: 118 x 112 x 80 mm1
Weight: 200 g2


Notes:

1 Of assembled robot with 80x10 mm wheels (not including bumper cage, which can be installed in a variety of orientations).
2 Of assembled robot as shown in the main product picture, with motors, 80x10 mm wheels, and bumper cage. This weight does not include batteries.


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Balboa 32U4 Balancing Robot Kit (No Motors or Wheels)

Balboa 32U4 Balancing Robot Kit (No Motors or Wheels)

Build your very own programmable balancing robot with the Balboa 32U4 robot kit! The Balboa control board features an Arduino-compatible ATmega32U4 MCU, motor drivers, quadrature encoders, and a full IMU. This board also has the ability to interface with a Raspberry Pi, making the foundation for a complete Raspberry Pi-controlled balancing robot. Motors and wheels are not included: choose your wheels and motors to personalize your robot.


See Description for more details about the product.

Don't delay, buy today. Add to cart now!

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