Pololu Blog (Page 25)

Welcome to the Pololu Blog, where we provide updates about what we and our customers are doing and thinking about. This blog used to be Pololu president Jan Malášek’s Engage Your Brain blog; you can view just those posts here.

Dagu Rover 5 controlled by a Raspberry Pi

Posted by Zeeshan on 23 August 2013

Pololu forum user chrisptx posted this video of his Dagu Rover 5. He is using a Raspberry Pi as the main controller and sending signals to a TReX Jr Dual Motor Controller for drive control.

This rover is controlled by a Samsung Galaxy S3 smartphone, which uses its web browser to send commands to the Raspberry Pi in Javascript.

Featured link: http://forum.pololu.com/viewtopic.php?f=2&t=7250

Controlling a Maestro in C using a Raspberry Pi

Posted by Brandon on 22 August 2013
Controlling a Maestro in C using a Raspberry Pi

Shahmir Javaid tweeted about a tutorial he wrote that describes how he used a Raspberry Pi to control a Maestro servo controller in C. His tutorial documents the steps he took, including setting up the Raspberry Pi for UART, wiring, and programming. The setup is simple, and the code is provided.

Featured link: http://shahmirj.com/blog/raspberry-pi-and-pololu-servo-controller-using-c

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.

Featured link: http://www.instructables.com/id/Internet-Arduino-Controlled-T-Slot-XY-Table/

New stranded wire: It's back to spool time!

Posted by Ben on 21 August 2013
Tags: new products
New stranded wire: It's back to spool time!

We just added bulk stranded hook-up wire in six gauges (20, 22, 24, 26, 28, and 30 AWG) and six colors to our selection of cables and wire. With all the combinations, that’s 36 new options for wiring up your next project! The convenient mini spools are all filled, so the wire lengths range from 40 to 100 feet (12 to 30 meters), depending on thickness.

New products: Fixed 3.3V and 5V Step-up Voltage Regulators U1V10F3 and U1V10F5

Posted by Ben on 19 August 2013
Tags: new products
New products: Fixed 3.3V and 5V Step-up Voltage Regulators U1V10F3 and U1V10F5

We have released two new step-up regulators that can boost input voltages as low as 0.5 V. Like the very similar U1V11x line of step-up regulators, these modules automatically switch to a linear down-regulator mode when the input voltage exceeds the output, making them great for powering electronics projects from 1 to 3 NiMH, NiCd, or alkaline cells or from a single lithium-ion cell. These modules do not offer the U1V11x shutdown functionality, which allows them to be much smaller (just 0.35″×0.45″) and a little less expensive ($4.49 each).

These regulators are available with a 3.3 V or 5 V fixed output voltage. For other options, you can take a look at our full selection of step-up voltage regulators, step-down voltage regulators, and step-up/step-down regulators.

Tron Suit Costume

Posted by Kevin on 19 August 2013

Swap_File posted a write-up of this Tron-inspired costume on the Adafruit forums. A pair of Wixels — one in the disc and another in the jacket — helps to enable wireless control of the suit’s lights and displays.

The costume was featured in a Wearable Wednesday blog post on the Adafruit blog.

Featured link: http://www.forums.adafruit.com/viewtopic.php?f=47&t=41560

Brute Force Car Radio Code Solver

Posted by Jon on 19 August 2013

Forum user Christian, writing from Germany, posted this video of an automated system he built that pushes buttons on a car radio (Becker Mexico CD 876) as a brute-force method to determine its radio code. In his system, he uses our Mini Maestro 12-Channel USB Servo Controller and 10 servos to extend rods of wood to press the numbered buttons on the radio console. You can read more about his system in this forum post.

The setup had already run for 3 days straight, but Christian expects it to take another 30 days to finish entering all 10,000 codes. We look forward to hearing back from Christian once it finishes.

Featured link: http://forum.pololu.com/viewtopic.php?f=2&t=7280

Pololu Wixel with SD Card as USB Mass Storage Device

Posted by Paul on 19 August 2013
Pololu Wixel with SD Card as USB Mass Storage Device

Pololu Forum user VolAnd, writing from St. Petersburg, Russia, posted about an app that turns a Wixel into a USB SD card reader. The Wixel identifies itself as a mass storage device, and basic read/write operations are working. His goal is to create files with the Wixel that he can then read from a PC. You can read more or get the app from his forum post.

This Wixel app and many others are available in our listing of community-contributed apps on the forum.

Featured link: http://forum.pololu.com/viewtopic.php?f=2&t=7143

Camera Control and Stabilization via PC

Posted by Jon on 16 August 2013

In this video, x-ioTechnologies uses one of our Maestro USB servo controllers with their x-IMU to demonstrate control and stabilization of a 3 DOF camera mount.

Featured link: http://www.youtube.com/watch?v=xjZod2SWvz4

New products: Encoder motors for 25D mm and 37D mm metal gearmotors, without gearboxes

Posted by Ben on 16 August 2013
Tags: new products

We are now selling the motor and encoder portion of three of our metal gearmotors, without a gearbox. The pinion gear on the output shaft works with the gearboxes on the corresponding products, so these can be used as replacement motors or encoders.

Motor with 48 CPR Encoder for 25D mm Metal Gearmotors (No Gearbox)


HP Motor with 48 CPR Encoder for 25D mm HP Metal Gearmotors (No Gearbox)


Motor with 64 CPR Encoder for 37D mm Metal Gearmotors (No Gearbox)