Jack Crossfire
  • San Ramon, CA
  • United States
Share

Jack Crossfire's Friends

  • FitSystems
  • Raviv Raz
  • Miles Colman
  • Adisorn R
  • Daniele Vergari
  • Nadia Shiwdin
  • Philipp de Graaff
  • David Merrill
  • Tin Trung Tran
  • sara aby
  • Acorn
  • Brent Crude
  • Peter Holzknecht
  • Alex gee
  • simonlee0311

Jack Crossfire's Groups

Jack Crossfire's Discussions

EasyStar as a pure GPS UAV

Started this discussion. Last reply by Reto Oct 29, 2009. 7 Replies

 

Jack Crossfire's Page

Latest Activity

Jack Crossfire commented on Ioan Ghip's blog post Man sized *copter
"The lack of any other documentation besides a blurry video & the small size compared to previous multicopters make it unlikely. But Guinness did make the video & Canadians are more honest."
Sunday
Jack Crossfire commented on Nick McCarthy's blog post SteamVR's "Lighthouse" to be applied as a precision-landing technique.
"Who knows why he used an optical projector instead of RF for the synchronization pulses, but in this age of eternally rising valuations with no need to ship anything, he could have just as easily used smoke signals."
May 20
Jack Crossfire commented on Melissa Brandao's blog post Introduction to Sparky the FarmDogg
"Should be called Rogue Rocket Rovers"
May 14
Jack Crossfire commented on Marco Robustini's blog post Introducing the Lily Camera
"The days of gyros having to be stationary for calibration are over, but no-one ever asks how they do it."
May 12
Jack Crossfire commented on Chris Anderson's blog post Patent application for Amazon's drone mothership
"They need to override nearby RC pilot quad copters, for a small fee.  Then it would be sharing economy compliant & instantly worth $50 billion."
May 9
Jack Crossfire commented on Greg Crutsinger's blog post eXom of Sensefly....not for the light of pocketbook
"A government customer most likely already bought & paid for it."
May 8
Jack Crossfire commented on Thomas J Coyle III's blog post Oculus Rift hitting market early next year
"What is their valuation now?  $50 trillion?"
May 6
Jack Crossfire commented on Randy's blog post Multi-Vehicle testing with APM:Copter, Tracker and Mission Planner
"That was a pretty hard yard to land in, with GPS."
May 4
Jack Crossfire commented on Jack Crossfire's blog post MakerBot Acquired In $604 Million Deal
"2 years after Bre got his $600 million reward, the staff finally got theirs: pink slips. http://motherboard.vice.com/read/makerbot-just-laid-off-20-percent-of-its-staff"
Apr 17
Jack Crossfire commented on Chris Anderson's blog post A glimpse of the scene at the 3DR booth at NAB
"That's like a $200,000 booth, next to Panasonic.  Multi billion dollar valuations have come."
Apr 14
Jack Crossfire commented on Chris Anderson's blog post Full Solo launch video
" While there are no demo videos, there is an animated GIF on Gizmodo showing some pretty impressive waypoint flying, mere feet from human heads, using just GPS.  Of course, it isn't a hit until there's a Kickstarter campaign. "
Apr 14
Jack Crossfire commented on Jesper Andersen's blog post And they say smoking is bad
"Li-Mn is an intriguing combination lacking the current of Li-Po, lacking the instability of Li-ion, with capacity in between.  The advantage is slightly higher power density without requiring a protection circuit."
Apr 10
Jack Crossfire commented on Mark Harrison's blog post Lending Club Testing Loan Drones for Faster Cash Disbursement
"Janet Yellen's next step, if the stock market ever falls below 17,000."
Apr 1
Jack Crossfire commented on Chris Anderson's blog post 3DR announces DroneKit, a full-featured SDK for drones, mobile and cloud
"Time to change the name to 3D Salesforce."
Mar 27
Jack Crossfire commented on Chris Anderson's blog post Google scraps VTOL design, back to the drawing board
"Does all of Google apply analytics to what percentage of an engineering team thinks something is a bad idea & treat the 5 month rule as a wall which must not be crossed?  How do these guys ever make a coffee?"
Mar 18
Jack Crossfire commented on Chris Anderson's blog post "Tyrone Drone", for unmanned aerial graffiti (with spray paint and flame thrower)
"Good compliment to the quad copter shaving cream dispenser."
Mar 14
Jack Crossfire commented on Chris Anderson's blog post Percepto, an add-on computer vision module for drones, now on Indigogo
"Used to make jokes in 1999 about selling a bag of silicon around which a community of open source developers would form to build millions of dollars of software around it."
Mar 13
Jack Crossfire commented on Grant Morphett's blog post Rover Release 2.49 is OUT!
"Can't wait for path following.  Maybe after the Google buyout."
Mar 6
Jack Crossfire commented on PacificBots's blog post Pacificbots - Update
"Would be interesting if a hobby grade ROV got images of the trans bay tube. Still well beyond today's technology, but not too unrealistic for a kickstarter project."
Feb 28
Jack Crossfire commented on Thomas J Coyle III's blog post Drone Maker 3D Robotics Raises $50 Million In Latest Round
"Buy out a good one."
Feb 27

Profile Information

About Me:
Head of blog rambling.

The 1st 3 years of flying + more off topic posts are on http://www.rcgroups.com/forums/member.php?u=115141

Image processing, robotics, & aeronautics are on http://heroinewarrior.com

Most diy droners are RC modelers who just want to automate their favorite model plane. I came from an image processing, software, & robotics background, not an RC modeling background, so my focus is on flight control, image acquisition, & blogs that no-one reads.
Please tell us a bit about your UAV interest
x
Hometown:
Pleasanton, Calif*

Jack Crossfire's Photos

Loading…
  • Add Photos
  • View All

Jack Crossfire's Videos

  • Add Videos
  • View All

Jack Crossfire's Blog

An entire neighborhood XMas lightshow from a quad

Posted on December 9, 2014 at 8:39pm 5 Comments

Holy subprime seasons.  While it was always possible for an entire neighborhood to synchronize its lights, it wasn't possible to actually see it until last year.  It's really a sight that cost a fortune until the rise of the quad, higher sensitivity cameras, & then the brushless gimbal.  Of course, flying a quad that high above a neighborhood is a very nerve…

Continue

Analysis of the follow cam problem

Posted on August 4, 2014 at 1:00pm 12 Comments

MikroKopter - FollowMe on the Wakeboard from Holger Buss on Vimeo.

The follow me concept using GPS is nothing new. It was demonstrated in 2008 at long range, with the normal lens cameras of the time.



Now, they're doing it at slightly closer ranges,…

Continue

The big 3 without editing

Posted on July 22, 2014 at 6:38pm 8 Comments



With so many unemployed programmers, it was only a matter of time before someone would try to free the bits & upload some videos. We'll see how long this lasts until the indy movie studios crush the rebellion. These videos covered what currently are the 3 mane copters, in a rare appearance without any editing.



Collinn was a lot more down to Earth than…

Continue

Brushless direct drive rover

Posted on July 11, 2014 at 11:25pm 7 Comments







The journey began when the G-buggy which served for 6 months was stepped on, bending a shaft & putting it out of duty.  It was otherwise falling apart on its own, after pacing 110 miles of running.…





Continue

Adventures with an RC car exercise coach

Posted on April 26, 2014 at 9:28pm 1 Comment



The RC car came along on Jan 8, 2014.  The…
Continue

Comment Wall (10 comments)

At 6:54am on March 30, 2008, Howard Gordon said…
Interesting reading. I spent some time with your blog at rcgroups, noting in particular your application of artificial neural nets. I may have missed a jump in your progression, but are you still running the lwneuralnet on a gumstix ? Just wondering, as most neural net libraries use floating point, but the gumstix only has fpu emulation, which is not fast.

Reason I ask is that I converted a simple back prop library to integer math and built it into my firmware, but have just started to think about how to incorporate it into actual operation. As you already have real-world experience in integrating back prop functions, I wondered if you wanted to give the code a try (on the ground) to see if the integer approximations are sufficiently accurate. I map 0.0 : 1.0 into 0 : 1024. If interested, code is here. Let me know if you have a chance to experiment - I'd appreciate some feedback.
At 12:26pm on March 30, 2008, Jack Crossfire said…
Converted lwneuralnet to integer a long time ago. It worked for solving the neural network but not for back propagation. Back propagation required more precision & full range beyond 0-1. 2048 lookup table entries was the largest before the cache overflowed.
At 6:58am on November 28, 2008, Constantinescu said…
Please help me to find all details concerning the software and hardware of version 2 implementation on a T-REX450 with a laptop. I intend to reproduce that on my ECO8.Many thanks,Georges
At 12:26am on November 29, 2008, Constantinescu said…
Thanks for your answer. I alreadi recovered the archive. Could you please send me some more detals concerning the hardware(components, electric connections, procedures for preliminar adjustement of parameters, etc); something "pense bete" for a beginer in the field. Yours Georges
At 10:57pm on April 8, 2009, Harry Cheung said…
Yeah, I should have included that. Anyways, I added a link to the ublox module I have, it's this:

http://www.sparkfun.com/commerce/product_info.php?products_id=8889
At 9:32pm on May 25, 2009, Zik said…
Hi Jack - thanks for your comments on picoc. Yes, it's still alpha quality at this stage. I'm still working on it pretty heavily but hope to reach a 1.0 release in the not too distant future.
At 9:38pm on October 17, 2009, Andy Geppert said…
Jack, any chance you're in flying in the bay area Sunday (the 17th)? I'm in the area this weekend and it would be cool to meet you and see your machine fly.
At 3:10pm on December 4, 2009, Sahil Jain said…
so Chris is from Sparkfun? and you're from...?

sorry, for asking these questions. I am trying to design a board that I want to sell in the $80-100 price range. so trying to understand the target costs. any help would be appreciated. Just for fun, not going to make any money on it. Thanks.
At 3:33pm on December 8, 2009, Jack Crossfire said…
Most of the people on diydrones sell products through Sparkfun. The standard arrangement is to add 40% to the price & Sparkfun adds another 40% to the price. It's no secret. A place like Cloudcap adds 1000% to the parts. Personally working in Indian outsourcing where they expect a 12 hour / 6 day commitment & if you're spending evenings selling your own product instead of your boss's, it better produce a 1000% return or you're out. All your time is company time in outsourcing.
At 3:55pm on December 6, 2010, Hamish said…
$5 per gyro axis? what ? where? gimme gimme gimme!

You need to be a member of DIY Drones to add comments!

Join DIY Drones

 
 
 

Groups

Season Two of the Trust Time Trial (T3) Contest 
A list of all T3 contests is here. The current round, the Drone Delivery Challenge, is here

© 2015   Created by Chris Anderson.

Badges  |  Report an Issue  |  Terms of Service