Jack Crossfire's Blog (184)

Drone fly-in







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Added by Jack Crossfire on January 20, 2014 at 6:59pm — 13 Comments

Laser range finder teardown

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Added by Jack Crossfire on January 6, 2014 at 1:25am — 12 Comments

Lettuce farming robots podcast



http://www.robotspodcast.com/podcast...episode142.mp3

Got around to listening to it out of curiosity.

http://www.bluerivert.com/



It's not necessarily quad…

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Added by Jack Crossfire on January 4, 2014 at 3:22am — 3 Comments

Awash in GPS autopilots

Clicking through…
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Added by Jack Crossfire on December 30, 2013 at 2:48am — 7 Comments

Bay area drone startup #3

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Added by Jack Crossfire on December 23, 2013 at 7:08pm — 8 Comments

Internet over 3DRRadio



It is horribly impractical, but works with enough…
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Added by Jack Crossfire on November 17, 2013 at 9:30pm — 7 Comments

The VR goggle meets Rube Goldberg









Google recommended this video & it's relevant to the RC hobby drone industry VR goggle…

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Added by Jack Crossfire on October 19, 2013 at 11:44pm — 10 Comments

PX4flow microquad adventure



The PX4flow is expensive, heavy, & fragile.  Its sonar module is insufficient, so you need to replace it with a more powerful module.    Replacing the MB1043 with an MB1240 & translating the serial protocol from cm to mm is required.  Only the…

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Added by Jack Crossfire on October 9, 2013 at 10:02pm — 12 Comments

3D Robotics/Arducopter on CBS/CNET

1st post.  Nothing novel revealed, but it's friggin CBS, the big league.  Personally would have been ecstatic just to get that close to Molly Wood.

Added by Jack Crossfire on September 18, 2013 at 10:08pm — 10 Comments

Why the drone crashed into the stands

Owner knows why drone crashed into stands at bull run



Found the story intriguing. Batteries remane fickle things. Their total charge is still only estimated by stopwatches & coulomb counters, but there is no dip…

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Added by Jack Crossfire on August 30, 2013 at 10:25pm — 51 Comments

Active cooled brushless gimbal



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Added by Jack Crossfire on June 2, 2013 at 2:52am — 4 Comments

Optical flow stories



Look how well you can navigate using just el cheapo optical flow…
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Added by Jack Crossfire on May 30, 2013 at 3:00am — 1 Comment

3 axis brushless gimbal



The key…

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Added by Jack Crossfire on May 25, 2013 at 3:56am — 9 Comments

The mini AR Drone



The copter flies away & returns to the starting point at 2 different altitudes, using only optical flow odometry for position & sonar for altitude. The fact that it landed at nearly the takeoff position was probably coincidence,…

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Added by Jack Crossfire on April 1, 2013 at 11:44pm — 8 Comments

Infra X teardown





As expected for an undamped, strictly proportional feedback system, it bounces off walls faster & faster until it crashes.  It can't hover stationary, from the reflected IR.  Walls not completely reflective, not completely seemless, or not orthogonal to the sensors are less effective.



To engage the altitude hold, fly above 0.2m & get…

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Added by Jack Crossfire on March 4, 2013 at 8:00pm — 2 Comments

AR Drone 2.0 teardown







For all the talk of the drone revolution, there remanes but 1 vehicle which…
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Added by Jack Crossfire on February 26, 2013 at 10:00pm — 9 Comments

Ladybird autopilot

The 1st flights good enough to get on video. It's extremely unstable, but there is hope. The MPU9150 was the only way to get the sensors small enough. It might also be the smallest thing currently…

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Added by Jack Crossfire on February 2, 2013 at 8:30pm — 10 Comments

Secrets of the MPU9150







After another…
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Added by Jack Crossfire on January 31, 2013 at 4:53am — 18 Comments

Tablets, copters, & extreme precision

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Added by Jack Crossfire on January 17, 2013 at 10:50pm — 11 Comments

Groups

Season Two of the Trust Time Trial (T3) Contest 
A list of all T3 contests is here. The current round, the Vertical Horizontal one, is here

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