Romi Chassis Kit - Blue

Pololu item #: 3506 72 in stock

Price break Unit price (US$)
1 29.95
5 26.96
25 23.96
100 20.96


backorders allowed

The versatile Romi chassis is a great starting point for your next mobile robot. This kit includes all the basic mechanical parts to get up and running, including two motors, two wheels, one ball caster, and battery contacts. The wheels and ball are white; all other plastic components are blue.

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 Description Specs (3) Pictures (18) Resources (3) FAQs (0) On the blog (2) 

Overview

The Romi chassis is a differential-drive mobile robot platform with a diameter of 6.5″ (165 mm) and an integrated battery holder for six AA batteries (not included). The drive wheels are located on a diameter of the circular base plate, allowing for turns or spinning in place. A large, fixed ball caster in the rear provides a smooth third point of contact, and a second ball caster (not included) can optionally be added to the front. The chassis uses 70×8mm Pololu wheels and Mini Plastic Gearmotors with extended backshafts to enable quadrature encoders for position feedback.

The Romi chassis has an abundance of general-purpose mounting holes and slots intended for various sizes of screws (not included) such as #2-56, #4-40, M2, and M3. These holes can be used for mounting your electronics, such as your microcontroller, motor drivers, and sensors.

The plastic components making up the chassis are available in six colors, either individually (for use as replacement parts or to make custom color combinations) or in kits that include motors and battery contacts.

This animation shows how the parts fit together:

See the user’s guide for more complete assembly instructions.

Details for item #3506

Kit contents

Additional required components (not included with the kit)

In addition to what comes with the kit, you will need the following:

You will likely also need a soldering iron for connecting your motors and batteries to your electronics.

Optional accessories

  • Power Distribution Board for Romi Chassis – This board helps you get your Romi chassis running quickly. It solders to the chassis’s battery contacts and provides reverse battery protection, several power switching options, and convenient access to the various power busses.

Power Distribution Board for Romi Chassis on a black chassis.

Power Distribution Board for Romi Chassis.

  • Motor Driver and Power Distribution Board for Romi Chassis – This board is an alternative to the Power Distribution Board mentioned above. It offers the same features (reverse battery protection, multiple power switching options, and convenient access to various power busses) along with dual motor drivers and a powerful switching step-down voltage regulator that can deliver 2.5 A at 5 V or 3.3 V.

Motor Driver and Power Distribution Board for Romi Chassis.

Motor Driver and Power Distribution Board for Romi Chassis.

  • Romi Encoder Pair Kit – Add quadrature encoders to the mini plastic gearmotors on your Romi chassis with this kit that uses a magnetic disc and Hall effect sensors to provide 12 counts per revolution of the motor shaft.

The included low-profile headers are still long enough to work with our pre-crimped jumper wires.

The Romi Encoder can plug directly into the Motor Driver and Power Distribution Board for Romi Chassis.

  • Romi Chassis components – Chassis components are available individually for use as spare parts or for those who want to put together their own Romi chassis with the color combinations of their choosing.

Romi Chassis Base Plate – White.

Romi Chassis Motor Clip Pair – Blue.

Romi Chassis Ball Caster Kit – Red.

Pololu wheel 70×8mm pair – yellow.

People often buy this product together with:

Romi Encoder Pair Kit, 12 CPR, 3.5-18V Romi Encoder Pair Kit, 12 CPR, 3.5-18V
Motor Driver and Power Distribution Board for Romi Chassis Motor Driver and Power Distribution Board for Romi Chassis
Romi Chassis Ball Caster Kit - Blue Romi Chassis Ball Caster Kit - Blue

Related Products

Romi Chassis Kit - Black
Romi Chassis Kit - Pink
Romi Chassis Kit - Red
Romi Chassis Kit - Yellow
Romi Chassis Kit - White
Motor Driver and Power Distribution Board for Romi Chassis
Romi Encoder Pair Kit, 12 CPR, 3.5-18V
Power Distribution Board for Romi Chassis
120:1 Mini Plastic Gearmotor HP, Offset 3mm D-Shaft Output, Extended Motor Shaft
Pololu Wheel 70×8mm Pair - White
Romi Battery Contact Set
Rechargeable NiMH AA Battery: 1.2 V, 2200 mAh, 1 cell

Related Categories

Romi Chassis Kits
Romi Chassis and Accessories
Romi Chassis Components
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