FreeIMU: an Open Hardware Framework for Orientation and Motion Sensing | www.-

The goal of the FreeIMU Framework is to simplify the development open hardware org framework projects based upon the most powerful and new consumer grade inertial, magnetic and open hardware org framework sensors. The main application of Open hardware org framework is orientation sensing : by reading the data from the various sensors is possible to compute precisely the orientation of FreeIMU in the space.

Recent boards also feature an high resolution barometer allowing to precisely track the device altitude. This can be useful in many applications: human-computer interaction device prototyping, flying machines, robots, Open Hardware Bench 900 human movement tracking and everywhere orientation sensing is a key aspect. As FreeIMU breakout the sensors interrupt pins, it's also possible to detect per axis single and double taps, free fall as well as activity or inactivity.

Interrupts pins are also very useful if you are into interrupt based reading of the sensors, useful to develop high frequency interrupt based sensor reading. Older video presentations: FreeIMU v0. You are free, actually encouraged, to use it for any purpose, to study and modify its designs, to make your own copies of FreeIMU and even sell your own FreeIMU based hardware.

But, you will have to share your designs based on FreeIMU keeping attribution and sharing them using the same libre license. On FreeIMU repository see development section below and from the downloads on this page, you have access to everything open hardware org framework need to build your own FreeIMU board. The FreeIMUs boards bought from the above shops financially support the project. The boards have been produced and assembled in Italy by reasonably paid workers in a safe environment in respect with European and Italian laws.

The are various ways of soldering the board. If you only need a couple of boards done, tack flux, solder wire and hot air reflow station are enough to build your boards Remember not to use hot air over the pressure sensor. See this video for good instructions. In open hardware org framework you are building more units, an SMD stencil open hardware org framework solder paste is the suggested method. FreeIMU v0.

It doesn't have any voltage regulator nor any level translator so it needs to be connected to a 3. When used on a 5V microcontroller, an I2C level converter and a voltage regulator are needed.

With these components it's extremely simple to use FreeIMU v0. The drill hole should have been 0. Consequence of this is that only rounded pins will fit inside the drill and standard squared pins won't fit. This is not really a problem as the big oval pad makes actually possible to use 90 deg squared pin arrays using the pad as a smd connector.

The Kicad sources above and the gerbers marked with "Fixed" have this issue fixed. However they haven't been tested on production so double check them before send them to fabrication. FreeIMU version 0. The gyroscope is still the ITG There have been some corrections in the silkscreen and the footprint of the HMCL have been made slightly bigger to make assembly easy.

Everything else is just as in FreeIMU v0. FreeIMU 0. By using the MIC, no tantalum caps are used in the whole design. Tantalum is not a good idea socially and environmentally. The board has integrated 2K2 pullups resistors which can be enabled or disabled by means of a solder switch but doesn't have an integrated logic level converter.

In fact, given a properly configured software, it's a redundant part. Moreover the upcoming development of many 3V3 based control boards eg: Multipilot 32 makes adding an LLC not a very far-seeing choice. The board, a part from the usual power and I2C connectors, breaks out the interrupt pins for all the three sensors. This should empower software developers to design interrupt based sensor reading and sensor fusion algorithms opposed to the currently common polling based approach which should provide possibility to shorten the cycle path of our algorithms.

The board comes with a voltage regulator MIC and 2K2 pullups optionally disabled by using of a solder switch. The FreeIMU library now supports all the versions up to v0. By default it's configured to be used on v0. In order to use on different boards, open the file FreeIMU. Note for FreeIMU v0. In order to use the library with HMC v0. Author notes: 1. This does slow down the sampling rate. Without the quaternion print, the code completes in less than 10mS, so the sampling rate is exactly Hz as set by the timer.

More details and possibility to contact the author on the FreeIMU community development forum. Have you ported the FreeIMU library to other platforms? Please let me know and I'll list your work here! A calibration GUI application is available. Open hardware org framework software is currently in alpha state, however many people are already using it.

The calibration, when properly executed, open hardware org framework improve the orientation sensing performance of the FreeIMU framework. If you are experiencing drifting or inconsistent results, your sensors may need to be calibrated using the Calibration GUI.

This is the place where you can get help, join others in developing new features, discuss IMUs applications and much more.

Previously we used FreeIMU answers on Launchpad as well as comments on Fabio's website for supporting users, however we decided to create an ad-hoc website to facilitate information gathering and collaboration between people.

Previously bug reports were posted on the Launchpad bug reporting interface but that's not used anymore. FreeIMU repository holds all the various library sources as well as design files and schematics.

Open hardware org framework is revisioned meaning that Open Hardware Oscilloscope 65 open hardware org framework the changes are logged and annotated. The contents of the repository are available using Bazaar bzr with the command: bzr co lp:freeimu. Never used bzr before?

Not a big deal, it's very similar to git, svn or others. You may wanna have a look at the cheatsheet to have an overview of the commands available or read more open hardware org framework on bzr. Alternatively, in case you have problems setting up bzr on your system, you can simply get the latest repository contents from here. The resulting file is a. Mac and Linux users shouldn't have problems opening such files.

The open hardware org framework on the repository can also browsed from a browser here. A list of recent changes is available here. Warthox testing indoor FreeIMU v0. Warthox stress test FreeIMU open hardware org framework. Great work! The cube is spinning pretty good! Someone pls help. I need the open hardware Open Hardware Days 4g org framework to test the IMU. In the 3D Cube open hardware org framework If anyone will to help me.

I really appreciate all of your help as i need it very urgently. So please, help me? My email is mingjie [at] hotmail [dot] com. I did also buy the sprakfun 9df sensor stick to conect it. I need gui to process that. It is Python collected data from my Samsung! I open hardware org framework cannot translate the data into the points.

I am trying to run the altitude example in the free IMU download on this page. I downloaded all the libraries included into my sketchbook. I was able to compile and download it to the Arduino open hardware org framework any errors. After downloading, I looked used the serial monitor tool and i only get junk values that look like noise.

Has anyone else experienced issues getting altitude information like this? Or does anyone know what can help my problem? I have run processing and it is showing the cube and it moves but it is going exceptionally slow. Also, has anyone found a solution for the Yaw Drift? Dear Fabio, we already had contact some time ago. I work an a dance multimedia project and use your FreeImu to measure the head movements of the dancer www.

The 0. Latetely I testet the backup device 0. The following problem occurs:. The magnetometer of this device has kind of a delay. You turn the device into another orinetation. The magnetometer reacts. Once it is in the new position it needs sometimes until seconds until it shows the right heading. Basically it moves too far and is slowly moving backward.

Older video presentations: FreeIMU v, FreeIMU v and A true Open Hardware project. FreeIMU is a true Open hardware, released under the CC-BY-SA. You are free, actually encouraged, to use it for any purpose, to study and modify its designs, to make your own copies of FreeIMU and even sell your own FreeIMU based hardware. May 16,  · The µCube framework is implemented as an OpenSCAD library [ 8 ]. OpenSCAD is an open-source 3D CAD programming language that supports parametric definition of three dimensional models. More specifically, each model can be thought of as an output of a function, where user-defined parameters specify its dimensions. openHAB runs on your hardware, doesn't require any cloud service to work, keeps your data privately at home and talks directly to your local devices whenever possible. At the core of our philosophy is that you always remain in control.

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