Category: General

[Radio] RTTY Library for Arduino

This is an library that handles radio information over RTTY in arduino, written in C++. You can choose either ascii 7 bit or ascii 8 bit. You need two pins that you define with...

[Heading] Calculating heading with tilted compass

[Heading] Calculating heading with tilted compass

Here i provide some formulas and calculations in a short and easy way to calculate your compassbearing when you’re compass is not leveled (when it is not on a flat surface). Essentially it’s based...

[Compass] Easy Magnetometer Calibration

[Compass] Easy Magnetometer Calibration

This code is a short example on how to calibrate your cheap magnetic compass. I used a three axis HCM5883 magnetometer from Honeywell. It’s very cheap, but mine was pretty bad. It turned out...

[Chip] Seeeduino Stalker

This is an overview of all the pins in the “Seeeduino Stalker” fabricated by Seeedstudios. Because it is totally unclear which pins are used for reading of battery statusses, requesting temperature, interfacing with the...

[Compass] Magnetometer Library (HMC5883)

This post includes a HMC5883 Magnetometer Library for Arduino. It contains a library that makes interfacing with a compass module (for arduino) in C++ very easy. There are other libraries for the HMC5843, but...

[2D] Optical flow

[2D] Optical flow

This is a function for optical flow in Matlab, using Lucan-kanande/Horn-Schunck optical flow estimation. It includes a sample code and the function itself. Assumptions behind the Lucas-Kanade and Horn-Schunck Optical Flow Estimation methods Both...

[2D] X-Rite Colorchecker SG ruler

[2D] X-Rite Colorchecker SG ruler

There is something weird about the Gretag Macbeth X-rite ColorChecker SG test target. Today i was working on the universal target software, working out the DPI from the SG alone. So i was confused...

[Radio] RTTY

This is RTTY (Radioteletype) code that you can use for your C++ application (for instance Arduino). This can be used for the transfer of information through radio (or optics, see below). I have used...

[GPS] Lassen IQ Breakout PCB

This is the PCB file for the Lassen IQ GPS receiver module breakout. It’s a great module for getting GPS signals to use with your arduino. I have used this for the Space Camera...