I'm sorry for the delay, this episode was recorded by Chris' phone and my laptop and the background noise required a lot more edits than usual. Jack Crossfire will be pleased to note that I found the source of the reverb and confined it to a theoretical vacuum. Of course the background noise probably didn't help (it's better at the end) but the…
Finally, the article I wrote is out in the May 2010 issue of Circuit Cellar Magazine. Unfortunately I have yet to get my hands on it. From http://www.circuitcellar.com/magazine/; it's $2 to buy or go to Barnes and Noble and get yourself a copy of the magazine.
The FreeSpace IMU: A Quaternion-Based Algorithm for Attitude Estimation…
Philip Torrone and Limor Fried from Adafruit gave a great short presentation at foo camp east last week that discussed the growth in open source hardware companies (including DIY Drones). The industry is now about $50m and doubling annually--they think it's going to be a billion-dollar sector within five years. Companies were surveyed and grouped in "over $1m" and "approaching $1". DIY Drones was in the latter category ;-)
We've had the ArduPilot 2.6 code in the repository for a while for alpha testers, but it now seems solid enough for wider testing. So it's now available in an easy-to-use zip file for everyone to download and try. Doug Weibel, the main author, has described many of the new features here, but here are some more… Continue
This month's MAKE magazine is focused on RC and is especially good. The cover story is an Arduino-controlled RC lawnmower that the guy is converting to autonomous control with ArduPilot, and there are a few other ArduPilot mentions in there (plus a little contribution from me on interfacing RC with… Continue
I'm partial to the STM32 (ARM CORTEX-M3 based uController) line of uControllers, not only for their hardware mul/div instructions, but also for their ability to have the ADC converter continually scanning and pushing to memory its conversion results from a series of analog devices.
Some more progress on the GCS. I integrated a line builder and line manager. The line builder contains the editor to edit GPS coordinates of the line, as well as options for line thickness and color. The line manager imports these coordinates as a set, and given a name. This clears up the line builder, allowing multiple lines to co-exist.
The Line builder can import a list of GPS coordinates from a text file with the format: lat lon