"Matt Chave and the CUAV project A lightweight low-power magnetometer only based UAV flight control system Interview with Matt Chave by Chris Anderson Part 1: http://diydrones.com/profiles/blog/show?id=705844%3ABlogPost%3A22568 Interview with Matt…"

"If you're on a very tight budget, and all you want to experiment with is a camera stabilization system, you may want to take a look at this page. It (the stabilized servo) may be a lot less expensive than hobbling parts together on your own…"

"Interesting idea :-) The core answer seems to be that while you can know what direction you're pointing, you can't know what direction "down" is, and therefore can't know whether a control movement will send the thing up,…"

"well im a poor man! im going to try and make a 3D camera stabiliser to start with, thought it would be cheaper than doing a whole UAV i just want to know what the minimum number of sensors (ie cheapest setup) I can get away with :D looks like 3…"

"I would vote for Java for the following reasons: - It has the biggest developper's community - It is truely cross-platform ( You could also have a J2ME flavor for mobile devices) - There are loads of very good free IDEs available (eclipse,…"

"You might want to look atPNI micromag which is supposed to have a better resolution. Also, a wide scale magnetic model is freely available (see WMM here). Although there certainly are local variations, the magnetic field is supposed to remain…"

"Very nice! I have been working on integrating a PNI micromag 3 axis with ArduImu+. I must admit my set-up is much bulkier. I am in the process of updating the DCM code to perform yaw-corrections based upon magnetometer input. Part of the code should…"

"For PNI Micromag, there is a trade-off between precision(gain) and update-rate. A good compromise seems to be with "Period select" set to 1024 which leads to 15 msec measurement time per axis => about 50 msec for a 3-axis measurement."

"I have done some testing on an EZstar with a PNI Micromag 3-axis mag. When putting the sensor in the nose, the engine perturbation is hardly noticeable. It is not very good for crashes, but it works. For Quadcopters, i agree it is probably a…"

"Thx Mark for the update. Seems to me like being bound to a paying dev environement is not ideal for a community project like this one. But i will definitely give Labview a closer look!"

"Out of curiosity. Which dev environment are you guys using for Labview? Is there a free version available?"

"Looks like this project uses a stm32 not an Atmega. These are much faster beasts ;-)"

"Using GPS velocity to infer a reference vector (UAV nose) is not ideal though. In side-wind situations for example. Having a Magnetometer allows to have a cleaner reference vector for attitude correction. Biggest drawback is to account for local…"

"I was able to compensate for this using an offset and scale factor for each axis. The result placed the experimental sphere bang on the ideal sphere. I then assumed a linear relationship with throttle, yet this could be improved with additional…"

"Hi Dan, thx for the data. Seems like we are looking at a 10% perturbation. If it is somehow proportional to the throttle level, there should be a way to compensate it in real time and get a pretty accurate refernce vector. I am going to give it a…"