Posts with «mpu6050» label

Gyro Controlled RGB Blinky Ball Will Light up Your Life

[James Bruton], from the XRobots YouTube channel is known for his multipart robot and cosplay builds. Occasionally, though, he creates a one-off build. Recently, he created a video showing how to build a LED ball that changes color depending on its movement.

The project is built around a series of 3D printed “arms” around a hollow core, each loaded with a strip of APA102 RGB LEDs. An Arduino Mega reads orientation data from an MPU6050 and changes the color of the LEDs based on that input. Two buttons attached to the Mega modify the way that the LEDs change color. The Mega, MPU6050, battery and power circuitry are mounted in the middle of the ball. The DotStar strips are stuck to the outside of the curved arms and the wiring goes from one end of the DotStar strip, up through the middle column of the ball to the top of the next arm. This means more complicated wiring but allows for easier programming of the LEDs.

Unlike [James’] other projects, this one is a quickie, but it works as a great introduction to programming DotStar LEDs with an Arduino, as well as using an accelerometer and gyro chip. The code and the CAD is up on Github if you want to create your own. [James] has had a few of his projects on the site before; check out his Open Dog project, but there’s also another blinky ball project as well.

Hack a Day 03 Nov 03:00

Building an Electric Scooter That’s Street Legal, Even in Germany

Sometimes a successful project isn’t only about making sure all the electrons are in the right place at the right time, or building something that won’t collapse under its own weight. A lot of projects involve a fair amount of social engineering to be counted as a success, especially those that might result in arrest and incarceration if built as originally planned. Such projects are often referred to as “the fun ones.”

For the past few months, we’ve been following [Bitluni]’s DIY electric scooter build, which had been following the usual trajectory for these things – take a stock unpowered scooter, replace the rear wheel with a 250 W hub motor, add an ESC, battery, and throttle, and away you go. Things took a very interesting turn, however, when his street testing ran afoul of German law, which limits small electric vehicles to a yawn-inducing 6 kph. Unwilling to bore himself to death thus, [Bitluni] found a workaround: vehicles that are only assisted by an electric motor have a much more reasonable speed limit of 25 kph. So he added an Arduino with a gyro and accelerometer module and wrote a program to only power the wheel after the rider has kicked the scooter along a few times – no throttle needed. The motor stops after a bit, needing another push or two to kick it back on. A brake lever kills the motor, as does laying the scooter on its side. It’s quite a clever design, and while it might not keep the Polizei at bay, you can’t say he didn’t try.

[Bitluni] has quite a range of builds, from software-defined television to bad 3D-scanners to precision wine glass whacking. You should check out his stuff.

Thanks for the tip, [Baldpower].

Gyro Angle Calc - using Arduino Uno & IMU Breakout Board GY-521, MPU6050

I'm building a balancing robot using Arduino Uno & a MPU6050 IMU.

I've never programed anything before so naturally I'm struggling a bit.

I've got some code that calculates an angle from the accelerometer reading & I need to do the same for the gyro reading to feed into a complimentary filter. However it's not working & I haven't figured out why. (I've used the lirbray built by Jeff Rowberg and some of his code too).

Please have a look at the code attached & see if you can help me out a little.

 

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MPU6050 IMU - Gyro angle calc for balancing robot

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What does it do?

Balancing RObot

I'm building a balancing robot using Arduino Uno & a MPU6050 IMU.

I've never programed anything before so naturally I'm struggling a bit.

I've got some code that calculates an angle from the accelerometer reading & I need to do the same for the gyro reading to feed into a complimentary filter. However it's not working & I haven't figured out why. (I've used the lirbray built by Jeff Rowberg and some of his code too).

Please have a look at the code attached & see if you can help me out a little. 

 

Cost to build

Embedded video

Finished project

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URL to more information

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