Posts tagged “community projects” (Page 13)
You are currently viewing a selection of posts from the Pololu Blog. You can also view all the posts.
The folks from SHARC have converted a Jeep into an autonomous robot for SparkFun’s annual Autonomous Vehicle Competition that took place last weekend. Their robot, Troubled Child, won first place in its class and the “Crowd Favorite” award.
Long-time customer Michael Shimniok (our first blog post — from before we called it a blog — was about a tutorial he wrote for programming AVRs from a Mac) used his 1986 Jeep Grand Wagoneer to explore the back roads of Colorado and Utah before converting it into an autonomous vehicle. The autonomous Jeep uses our D15V35F5S3 switching step-down voltage regulator for powering the on-board electronics, and our dual relay board for running the warning horn and deactivating the pneumatic brake failsafe.
You can check out their final run from inside the vehicle in the video below.
Forum user Pablo shared his Wi-Fi controlled robot with pictures and videos from his Instagram. In Pablo’s forum post, he summarizes his project, which consists of a custom PCB that he designed himself to interface a PIC18F26K20 with a MRF24WB0MA Wi-Fi module. His custom board also carries a DRV8835 motor driver and is mounted on a Zumo Chassis. The robot is controlled through Wi-Fi using a custom Android app and has a GoPro camera mounted on the Zumo blade. Finally, to top it all off, he placed a 6" Domo plush doll on top.
The picture below shows his fully assembled PCB, and Pablo posted a sped up video of its assembly.
The inside of the Geiger counter.
The home-made Geiger counter featured in this post by forum user bob_day uses an A-Star 32U4 Micro, LND 7313 Geiger tube, and LCD to measure and display Geiger tube counts. The LCD displays the counts detected during the last minute, the average counts per minute, and the maximum counts in a minute. The project was originally designed for the Arduino Micro, but the program was able to run on the A-Star without any software modifications. The entire project is powered from one S7V8A adjustable step-up/step-down voltage regulator, and the conditioning part of the circuit, which shapes the output into narrow pulses, was designed by bob_day . Schematics and code for the project are included in the forum post.
The case and display of the Geiger counter.
The lightweight and compact RC-controlled wall-climbing robot uses a brushless DC motor for suction, and features a drive solution that uses four of our micro metal gearmotors, each driving a 32mm Pololu wheel and mounted with our micro metal gearmotor brackets.
The post includes pictures and videos of various iterations of Ibex and includes Luke’s reflection on the disheartening results of one of Ibex’s iterations. We’re glad to hear that Luke “stuck” with it, and now has a robot he is happy enough to market! We look forward to hearing more about Operative RC when more products become available.
Guido Bonelli Jr. of Innovative Electronic Solutions LLC created the ORBIS Wooden Kinetic and Lighting Sculpture for a client’s home using our custom laser cutting services. ORBIS hangs at 24″ in diameter and is 3/4″ thick. We laser-cut the parts from 1/8″ and 1/4″ baltic birch plywood, which were stained before assembly.
The separate control box and the wall unit each contain an Arduino Mega 2560 and an XBee module for wireless communication. The control box allows users to pick between two modes to control different features of the sculpture: kinetic mode allows users to adjust the rotating speed and direction of the two rings of the sculpture, and the color changing mode allows users to select various automated color patterns or control the red, green, and blue values individually to pick from 16 million colors.
For more information about ORBIS, check out the project’s web page.
The Beatty family is at it again with their amazing robot builds (if you missed it, check out their Mars Rover). They completed Aluminalis, a sixteen-legged walking robot made mostly out of machined aluminum components.
The video above shows their magnificent sixteen-legged walking robot. It is all controlled by an Arduino Nano and uses Pololu 20D 73:1 metal gearmotors with matching brackets to move all of its aluminum legs.
For more information on Aluminalis, check out its build page.
Forum user patman715 posted to the forum about his modified Zumo Robot. The video above shows a Zumo with a two-servo gripper and arm capable of lifting tennis balls into an on-board storage bin. It is all controlled by an Arduino Leonardo, and two of our 100:1 micro metal gearmotors (we suspect they are HP versions) seem to give it plenty of oomph for carrying around the extra load.
Erich, a professor at the Lucerne University of Applied Sciences and Arts in Switzerland, posted to our forum about a circuit he designed for the robots he’s building based on our Zumo chassis for his embedded system programming course. His Zumos are retrofitted with our micro metal gearmotors with extended backshafts and optical encoder board. The custom circuit he designed converts the analog output of our optical encoder boards to digital waveforms, which makes them more easily interpreted by microcontrollers and other devices. His board uses a Digital-to-Analog Converter (Microchip’s MCP4728) and four op-amps (Microchip MCP6004) to generate the modified quadrature output. The DAC can be controlled directly over I²C and can be calibrated automatically. After verifying that it works, Eric ordered a bunch more boards to use in his course:
We look forward to seeing how they work with the Zumos!
You can read more about Erich’s signal processing boards on this blog post from his website. You can follow the progression of the robots used in his course by visiting these forum posts:
March 2013: Zumo Robot with FRDM-KL25Z Board
September 2013: Zumo Robot with Pololu Plug-in Modules
October 2013: Zumo Robot with Pololu Plug-in Modules, assembled
December 2013: Zumo Tournament Videos
Nick Moxley made a DIY seat mover (with two degrees of freedom) and shared his build on our forum. This racing simulator is powered by two of our Jrk 12v12 USB Motor Controllers with Feedback and controlled from the popular XSimulator software. The picture below shows Nick’s jrk motor controllers, which he modified by adding heat sinks for additional cooling.
This is one impressive build that I highly recommend checking out, especially if you are interested in making your own DIY racing simulator. You can find details about the parts he used (including where he found some of them) as well as many pictures documenting different parts of his build in Nick’s post on the Inside Sim Racing forum. A shorter version of this can be found in Nick’s post on our forum.
We posted about a Simulink library for the Zumo robot recently, and now a tutorial that teaches you how to use that library to program a Zumo robot with Simulink is available on the Adafruit Learning System. The guide walks you through setting up a Simulink model to make the Zumo follow a specific trajectory, then loading the generated code onto the Zumo to see it run.
Related post: Zumo robots programmed with Simulink by MathWorks