Search found 43 matches

by f_petrini
Mon Sep 20, 2010 2:49 pm
Forum: Projects
Topic: The UAVs shall take over!
Replies: 6
Views: 5231

Re: The UAVs shall take over!

That 20 camera motion capture system cost about $300000. :shock:

DIY Drones has a podcast on the project here:
http://feeds.feedburner.com/diydronesmp3
(Episode 26 - Daniel Mellinger and the secrets of aggressive autonomous quadrotor maneuvers)
by f_petrini
Sun Aug 22, 2010 10:28 am
Forum: Development Tools and Programming
Topic: SPI slave why does this work?
Replies: 2
Views: 3253

Re: SPI slave why does this work?

You can use partout() to specify how many bits you want to output. partout(legacyData, 9, bitrev(ma) >> 23); void partout ( void port p, unsigned n, unsigned val ) Performs an output of the specified width on a buffered port. The width must be less than the transfer width of the port, greater than z...
by f_petrini
Mon Aug 16, 2010 7:48 pm
Forum: Development Tools and Programming
Topic: Image Compression
Replies: 12
Views: 7930

Re: Image Compression

I'm using a dedicated 5.8GHz video link to transmit video and will only use the XK-1 to overlay graphics on the video signal. Currently I'm using a GoPro Hero HD camera and an Iftron 25mW transmitter. On the ground I have a Iftron receiver connected to a pair of Fat Shark video goggles. You may want...
by f_petrini
Sat Aug 07, 2010 9:23 am
Forum: Development Tools and Programming
Topic: XC training video - what next?
Replies: 7
Views: 5984

Re: XC training video - what next?

I agree with Berni.
I'd like to see an in-depth video about channels since they are such an important part of concurrent programming.
by f_petrini
Sun Jul 25, 2010 2:42 pm
Forum: Development Tools and Programming
Topic: Non blocking read from streaming channel
Replies: 2
Views: 4065

Re: Non blocking read from streaming channel

There's no way of finding out if there's data available but you can make a non-blocking read. If you add a default case to a select block the default case will execute if no other case is executed. This block will read from the channel if there's data available, otherwise it just falls through. sele...
by f_petrini
Fri Jul 23, 2010 10:15 pm
Forum: Off Topic
Topic: Lucky coincidence with XK-1 form factor
Replies: 10
Views: 13292

Re: Lucky coincidence with XK-1 form factor

The maximum altitude in this video was 100 meters. Today I added high intensity LED strips on four of the arms, two red stripes on the front arms and two blue on the left/right center arms. The stripes are controlled by the flight controller so I can make the them blink in different patterns. Looks ...
by f_petrini
Thu Jul 22, 2010 10:36 pm
Forum: Off Topic
Topic: Lucky coincidence with XK-1 form factor
Replies: 10
Views: 13292

Re: Lucky coincidence with XK-1 form factor

That kind of video quality is what I'm hoping to achieve. Here's a video from my second test flight with a camera on-board, using a temporary camera mount without vibration dampening. I'm using an old point-and-shoot camera with low resolution so the quality is BAD and after the flight I also realiz...
by f_petrini
Tue Jul 20, 2010 4:41 pm
Forum: Off Topic
Topic: Lucky coincidence with XK-1 form factor
Replies: 10
Views: 13292

Re: Lucky coincidence with XK-1 form factor

That's cool what are the motor driver boards you are using on it, off the shelf or your own? As you noticed I'm using pre-built stuff. I've been wanting to build my own multicopter for some time but eventually realized that I'll never get enough time to build one from scratch. Even though it's not ...
by f_petrini
Tue Jul 20, 2010 2:33 pm
Forum: Off Topic
Topic: Lucky coincidence with XK-1 form factor
Replies: 10
Views: 13292

Lucky coincidence with XK-1 form factor

I'm currently building an Oktokopter for FPV (first person view) flying and to shoot aerial photo and video: http://petrinis.se/blog/wp-content/gallery/miscforum/thumbs/thumbs_okto1.jpg Since I want to fly FPV with an on-board camera and RF downlink to video goggles I also want to have a video overl...
by f_petrini
Thu Jun 17, 2010 5:12 pm
Forum: Projects
Topic: Wireless sensor network
Replies: 8
Views: 4405

Re: Wireless sensor network

<t>I just had to try the Google translator on that post and I'm amazed how well the translator works.<br/> Sure, a few words were not translated at all and some Swedish phrases are totally messed up but I guess most of the text can be understood correctly.<br/> <br/> "Shit that is true, I have a car...