You are currently viewing a selection of posts from the Pololu Blog. You can also view all the posts.
Zippy is an RC balancing robot created by Larry McGovern. It uses an Arduino Nano to read pulses from an RC receiver and accelerometer and gyroscope data from an MPU6050. After processing that information, the Nano commands two ST motor driver development boards, which each control a 30:1 37D mm gearmotor with encoder. The whole system is powered by a 3S LiPo (brand: Zippy, of course!). You can watch Zippy scoot around on pavement below:
In the video description, Larry mentions that he modeled Zippy after the Balanduino robot, but we would like to highlight one noticeable difference: he used his own pair of wheels, which are mated to the output shaft of his gearmotors with our 6mm scooter wheel adapters! I had a major role in designing these, so on a personal note, it is especially exciting to see someone get a good use out of them. (It also looks like our stamped aluminum L brackets are used to mount the motors.)
Like other developers and engineers here, I made a robot for the LVBots Line Following Contest. This post describes my robot, Usain Volt 2.0, and details some of what I was thinking when I designed it. If you want to know more about the competition rules and how it was judged, see the LVBots line following rules. Continued…
This week at the Consumer Electronics Show, some of our engineers got to see Spider Dress 2.0, which was being exhibited by its designer, Anouk Wipprecht, at the Intel booth. The dress is designed to react to invasions of the wearer’s personal space with threatening insect-like legs controlled by servos. Two Maxbotix proximity sensors are used to detect movement, and two 12-channel Maestro servo controllers (one under each shoulder pad) control the response of the legs. The whole dress is controlled by an Intel Edison.
Anouk explains the dress in detail in this video, which was produced by Make, and features a brief cameo by yours truly:
Khan Academy user mbbackus created a demo that allows users to visualize the effects of sending different pulse widths to the SM-S4303R and Parallax continuous rotation servos. (You can use the up and down arrow keys to change the pulse width, and more instructions can be found as comments in the code.)
For those who are interested, you can learn more about standard RC servo pulses in this series of blog posts about hobby servos.
You can see the demo on its Khan Academy page.
We have a new batch of T-shirts available, just in time for winter! These shirts are very similar to the ones we released in 2012, featuring a printed circuit board (PCB) design in the shape of the Pololu logo on the front and the Pololu slogan “Engage Your Brain” on the back.
The shirts are available in a variety of youth and adult sizes, and this time we have two new colors available in addition to our standard royal blue: cardinal red and charcoal gray.
You can find our full selection in our T-shirts category.
Forum user bennard posted about his WiFi-enabled chicken coop, which uses a Raspberry Pi to monitor and log data about its environment, serve a web page, send emails, and open and close the coop door. The system has sensors for detecting temperature, humidity, motion, and light, and includes a 50W solar panel and solar charge controller for recharging its batteries. The automated door is a hinged piece of wood that is connected to a linear actuator (via this mounting bracket) and controlled by a jrk 21v3 motor controller.
You can learn more about bennard’s project in his forum post.
This animated spider prop takes a traditionally static Halloween display to new heights! The setup is simple: a Maestro servo controller and a continuous rotation servo raise and lower a spider with the help of a limit switch. Continued…
This project turns a innocent-looking ghost decoration into an ambush in wait for unsuspecting passersby. The basic idea is straightforward: whenever someone walks within a few feet of the ghost’s face, it blasts them with a terrifying burst of compressed gas. Continued…
Last December we started carrying addressable RGB LED strips based on the WS2812B LED driver. Since that driver integrates an LED and a driver into the same package, we were able to offer higher density strips than before.
We are excited to announce that we are now carrying an even higher-density WS2812B LED strip. This strip has 72 LEDs and is 0.5 m long, for a density of 144 LEDs per meter. It is also the shortest WS2812B strip we carry.
|LED side of the WS2812B-based addressable LED strips, showing 30 LEDs/m (top), 60 LEDs/m (middle), and 144 LEDs/m (bottom).|
|A 1/2-meter, 72 LED addressable RGB LED strip on the included reel.|
This LED strip, like the other WS2812B strips we carry, has both input and output JST SM connectors, which make it easy to connect multiple strips together. It is compatible with many popular microcontrollers, and we provide Arduino libraries to help you get started. More information about this LED strip, including how to use it, can be found on its product page.
You can also view our entire selection of WS2812B LED strips.
Heikki Leivo and Matti Koljonen are currently working together to develop a miniature autonomous electric boat, which they are calling Leviathan. The boat is made of polystyrene foam, uses brushed DC motors and servos for movement, and is controlled by a Raspberry Pi, which reads data from GPS and a MinIMU-9 inertial measurement unit for navigation. Leviathan is equipped with a camera and also features a D24V6ALV step-down regulator for powering servos and other electronics. The boat is also controllable over WiFi.
|The electronics inside Leviathan.|
Matti and Heikki plan for their vehicle to be able to run pre-defined routes, capture photos, and record video, among other things. You can learn more about Leviathan on its website.