Posts by Grant

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Dead reckoning and wall following with a Zumo

Posted by Grant on 20 February 2014
Dead reckoning and wall following with a Zumo

Forum user solderspot recently posted on our forum about some modifications he’s been making to his Zumo robot. First, he added our optical encoders for micro metal gearmotors to his robot, which required using motors with extended back shafts and cutting holes in the chassis to route the wires from the encoders.

This allows his Zumo to navigate by dead reckoning, using just the information from the encoders.

He also mounted a sonar sensor on a servo to his robot, which enables it to find its way around a room by following the walls.

A series of articles on solderspot’s blog, starting with this one, covers his experience building and programming his robot. It looks like solderspot has further plans for the Zumo, including more sophisticated autonomous navigation, so watch his blog if you want to keep up with the latest developments.

Adapter for universal mounting hubs to VEX wheels

Posted by Grant on 28 January 2014
Adapter for universal mounting hubs to VEX wheels

Forum user Hardsuit posted in this thread about the hub adapters he 3D printed for his robot, which is a roughly 1/4 scale RC Tachikoma from the Ghost in the Shell: Stand Alone Complex anime series. The adapters allow some of our universal mounting hubs to be used with VEX 4″ Mecanum wheels. You can find and download his STL file on Thingiverse.

The previous version of forum user Hardsuit’s Tachikoma.

The Tachikoma, which he has named Sapporo, also uses our Simple Motor Controller 18v15 and 29:1 Metal Gearmotor 37Dx52L mm. Some of the engineers here are GITS fans, and we are definitely looking forward to seeing it completed!

New product: Vibration motor

Posted by Grant on 13 December 2013
Tags: new products
New product: Vibration motor

Do you want your project to vibrate annoyingly like a cell phone? Then our new vibration motor might be just what you are looking for. The vibration motor is intended for 3 V operation and is small (11.6 × 4.6 × 4.8 mm) and light (0.8 g), which means you do not need a lot of space in your project for it. The vibration motor includes the small rubber sleeve shown in the picture, which allows for easier mounting and slightly dampens any chattering that might occur against the surface it is mounted to.

For more information, see the Vibration motor 11.6 × 4.6 × 4.8 mm product page.

We also carry three shaftless vibration motors:

Katy Perry peppermint dress with Pololu parts

Posted by Grant on 23 October 2013
Katy Perry peppermint dress with Pololu parts

Halloween is just around the corner, and people are looking to make fun costumes. I recently took a couple of calls from customers who were looking to make Katy Perry-inspired costume dresses with spinning peppermints, following the instructions found on this RPF forum thread. Parts from Pololu used to make the dress included an enclosed 3-AA battery holder with a switch and a Solarbotics GM3 224:1 Gear Motor. However, we suggest substituting our 200:1 Plastic Gearmotor, which has similar performance but no back shaft that needs to be removed.

If you have a cool costume that uses our products, please feel free to share them in the “Share your projects” section of our Forum.

Clusterbot, a beginner robotics project tutorial

Posted by Grant on 17 October 2013
Clusterbot, a beginner robotics project tutorial

Lonnie Honeycutt made a nice tutorial on how to make a simple beginner robot that uses many parts that you can find on our website. The tutorial breaks down the construction of the robot into different parts and includes videos that help demonstrate how to build the robot. It also includes links to some of our products used in the robot, like the TB6612FNG Dual Motor Driver Carrier, Pololu Robot Chassis, and the Tamiya 70097 Twin-Motor Gearbox Kit. Check it out if you are looking for a project to get you started.

Here are links to three parts of the tutorial he has posted so far:

Part 1: Arduino robotics – motor control

Part 2: Arduino robotics – chassis, locomotion and power

Part 3: Arduino robotics – wiring, coding, and a test run

Internet Controlled T-Slot XY Table

Posted by Grant on 22 August 2013

A customer sent us a link to this instructable that shows how to make an automated XY table that can be controlled through the internet. It is constructed from T-slotted aluminum extrusions and uses an Arduino and jrk 21v3 motor controllers to drive the axes using a pulley system.

You can interact with this XY table by going to TeleToyland, which has a browser based interface that allows you to draw an image and watch the XY table reproduce your image in a sandbox.