[Matt Turner] tipped us off back in January about his homemade Segway project. Unfortunately that message slipped through the cracks but we’re glad he sent in a reminder after reading Friday’s feature an a different 2-wheeled balancer.
We like it that he refers to this project as being on the budget of a graduate student with a young family. We certainly understand where he’s coming from, and we hope he can ride this to job interviews to show them he truly lives engineering. The control circuitry is a bit higher-end than we’re used to seeing. He chose a Cypress CY8C29466 SoC to control the device. But the sensors are a common choice, using the Wii Motion Plus and Wii Nunchuk for the gyroscope and accelerometer they contain. This is a no-brainer since the sensors are high-quality, cheap and available locally, and communicate of the standard I2C protocol.
When looking for motors [Matt] was happy to find an old electric wheelchair on Craig’s List. This also gave him a gear box, wheels, and tires. He added a pair of motor drivers, with his own alterations to suppress feedback. Sounds like they run a little hot because he plans to add cooling fans to them in the future. But this first iteration is up and running quite well as you can see in the clip after the break.
Continue reading “Another homebrew Segway clone comes in at under $300″
[Abhimanyu Kumar] has been hard at work building and posting about his quadcopter. So far he’s published ten installments for this build, letting us relive the adventure vicariously. But it’s number 11 that we’re really excited about as he plans to share the first free-flight footage in that one.
The bug was planted in his brain after hearing that a quadcopter was used to shoot some of the footage in Spiderman 2. He wanted one to call his very own but the cost of a ready-made unit was out of his league. So he decided to build one instead. The first version uses aluminum bracket for the cross making up the motor mounts. He added LEDs to liven things up and even made a demo video of the thing tied to a table (no IMU yet so free flight would be fatal). After this stepping stone he decided to go with a Wii Motion Plus and Wii Nunchuck as the positioning feedback sensors. There is also a body redesign with helps lighten the load.
It’s a fun project, and we can’t wait to see where he goes from here!
If you’re contemplating a quadcopter build here’s a way to add stabilization hardware without breaking the bank. The BaronPilot project uses an Arduino and a Wii Motion Plus module to ensure an even keel for your flying projects. The hardware inside of the Motion Plus includes two gyroscopes, which the BaronPilot monitors for changes in your flying rig’s orientation. The project serves as a co-pilot by differentiating between movements caused by the remote control, and changes due to wind or other outside factors (like hitting the quadcopter with a stick as seen in the video after the break). It should all translate to less chance of crashing due to operator error.
You can pick up a Motion Plus for less than twenty dollars, a deal when compared to the IMU boards that we usually see in quadcopter builds which usually run more than twice that amount. It’s an I2C device which makes it easy to hook up to just about anything. This project has native support for Teensy, Arduino Nano, and Arduino clones using an ATmega328 chip. But the portability of the Arduino platform should make it easy to tweak the code for use with just about any microprocessor.
Continue reading “Quadcopter stabilization system using Wii Motion Plus”
[knuckles904] was able to use the new Wii MotionPlus with an Arduino. Nintendo has released the WM+ in order to detect the motion of the controller better. The Wiimote only detects acceleration, whereas the WM+ detects rotation along 3 axes. The Arduino communicates with it over I2C, the same protocol that is used with the Nunchuk. To connect the two devices, he used jumper wires, but breakout boards are also available. He was able to create some example code with help from wiibrew.org. When paired with a Nunchuk, which contains a 3-axis accelerometer, you can have a 6 degrees-of-freedom IMU for under $40, perfect for controlling your robots or logging data.