Tag Archives: ADXL345

Implementing the Gauss-Newton Algorithm for Sphere Fitting (3 of 3)

Posted on September 15, 2012 by Rolfe Schmidt

The first post in this series made it clear that the major computational and storage costs to implementing the Gauss-Newton algorithm come in computing the matrices and . By carefully avoiding materialization of the Jacobian matrix and the residual vector, … Continue reading →

Posted in Mathematics | Tagged , , , , , , , , , , | 4 Comments

muCSense: Using Calibration

Posted on August 28, 2012 by Rolfe Schmidt

I just added some new code to the muCSense library to help calibrate accelerometers and magnetometers. I plan to use the framework to add calibrators for gyros and other sensors too. In this post, I’ll walk through an example sketch … Continue reading →

Posted in Electronics, How To | Tagged , , , , , , , , , | 3 Comments

muCSense: Introduction and Example

Posted on August 24, 2012 by Rolfe Schmidt

In my last post I walked through the steps you need to take to establish a simple connection with the three sensors on SparkFun’s 9DoF Sensor Stick. If you took those code snippets, dumped them into one file, and ran … Continue reading →

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Connecting to Sparkfun’s 9DOF “Sensor Stick”: I2C access to ADXL345, ITG-3200, and HMC5843

Posted on February 10, 2012 by Rolfe Schmidt

[Update 24 Aug 2012: This post gives good detail about how to communicate with the sensors on the 9DoF Sensor Stick, but if you want a cleaner solution (that has been updated for Arduino 1.0), have a look at this … Continue reading →

Posted in Electronics, How To | Tagged , , , , , , , , , | 41 Comments