What is Arduino, Why we choose it, what can we do with it?

Arduino is a rapid electronic prototyping platform composed by the Arduino board and the Arduino IDE. I’ll use it in my Master of Science project to create some kind of tangible interaction prototype. So, let’s have a look at it! Why Arduino? It is an open-source project, software/hardware is extremely accessible and very flexible to be customized and extended It is flexible, offers …

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Sending float variables over Serial without loss of precision with Arduino and Processing or Python

For a project I’m working on, I had the need to send some float variables computed on the Arduino board to a Processing program running on a computer over a Serial communication Link. Arduino doesn’t have any “out of the box” way to send float variables over the Serial interface but one could simply send …

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Latin1 encoded tables or databases with UTF8 data stored: convert them to native mysql UTF8 Tables/Database

In the years before MySQL 4.1, the first MySQL version which provided a complete and good support to different character encodings, developers who needed their databases to store UTF8 encoded data used different encodings (usually latin1) for table and databases while still storing real UTF8 data inside. While the DB and tables were, as an …

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From the AHRS sensor fusion orientation filter to a 3d graphical rotating cube

In a comment from Ciskje on my sensor fusion implementation, I’ve been asked to explain how the Processing graphical uses rotations to visualize the orientation informations coming from the sensor fusion algorithm. The question was basically, what’s the reason about using the Yaw, Pitch and Roll in a “strange” order in the following lines of code in my …

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two fingers scrolling on a linux synaptics notebook touchpad with X.org 7.4 (xorg-server 1.5)

X.org version 7.4 with xorg-server 1.5 introduces a new way of handling input devices (keyboards, mouses, touchpads, trackball, etc..). Instead of using some configuration rules in xorg.conf like in Xorg 7.3 and previous versions, input devices are now automatically configured and enabled in Xorg once the system found them. This process is called Xorg input hotplugging and …

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An homebrew DIY breakout board for the ADXL345 accelerometer: first process try. Tested with Arduino & Processing

This is my first try in creating an homebrew DIY breakout board for the ADXL345 accelerometer. Yes, I know: it’s pretty ugly.. but it works! This is the first try.I’ll try again soon using all the things I understood this time! This is how I did it: Design the PCB using Kicad Print the PCB …

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FreeIMU: designing a free (as in speech) 9 DOM/DOF MARG IMU

UPDATE 2011-02-10: Check out FreeIMU project page for all the informations about FreeIMU! In the past months I worked a lot on accelerometers, gyroscopes and digital compasses. I’m now pretty intimate with the ADXL345, the ITG3200 and the HMC5843. I’ve been able to design and construct homebrew DIY breakout board PCBs for all of them (ADXL345 and ITG3200) and to …

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A new homebrew DIY breakout board PCB for the ADXL345 accelerometer

Some time ago I created my first homebrew breakout board PCB for an ADXL345 accelerometer. After getting more experienced and testing the whole procedure some times I created a new and improved version. In the attachments below you find all the Kicad sources needed to edit the design or printing the design by yourself. All …

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