Matthew Coleman
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Matthew Coleman's Discussions

Where is the PX4?

Started this discussion. Last reply by Matthew Coleman Oct 11, 2013. 8 Replies

Now 3DR has cornered the manufacturing market for the majority of open source autopilots, I was wondering when it get its act together and actually build some.  Might be a smart move to build stuff…Continue

Tags: sucks, 3DR

Feature Request: Clear indication of actual airframe selected

Started this discussion. Last reply by Matthew Coleman Jul 22, 2013. 2 Replies

Just spent a frustrating half day of novelty crashes before finding that the hexa firmware was loaded instead of quad.  Please add a clear indicator showing which frame firmware is loaded.CLI debug…Continue

Building mavlink in scilab code block

Started this discussion. Last reply by Venkat Gidda Jan 23, 2013. 4 Replies

I am attempting to build the mavlink library in a scilab block to run SITL.When scilab compiles, it only finds the mavlnk headers if I name the absolute directory.  Changing the working directory…Continue

30 minute timout on Xbee link. Anyone have this problem?

Started this discussion. Last reply by Sgt Ric May 26, 2012. 3 Replies

I have had several long flights when the Xbee 2.4GHz S2 communication stopped around 30minutes after power up.  This may be something to do with ubunutu/netbook settings instead of the Xbees. I…Continue

Tags: timeout, Xbee

 

Matthew Coleman's Page

Latest Activity

Matthew Coleman replied to Noah Dalton's discussion Drone Clearing Snow off Solar Panels
"So you need a drone to fly a maintenance robot to the site install a cleaning robot.  What could possibly go wrong?"
Monday
Matthew Coleman replied to Noah Dalton's discussion Drone Clearing Snow off Solar Panels
"How about a flip top lid?  Close it during dark or when it is snowing.  Flip it open to eject the snow and bring in the sunlight. You could insulate the lid so with a little power you keep the panel dry.  If you insulate the lid then…"
Aug 24
Matthew Coleman commented on Thomas J Coyle III's photo
Thumbnail

3DR Decal

"Congratulations.  You have some extra awesome married into the family."
Aug 5
Matthew Coleman commented on Thomas J Coyle III's photo
Thumbnail

3DR Decal

"Now the boat is awesome but what about the bike.  Is that a Scott ransom with equalizer pull shock of weirdness?  More to the point, is it yours?"
Aug 5
Charles lakins commented on Matthew Coleman's blog post The uNode
"ahh i see you have tried a few :) yes its not a cheap thing to do ,the tools of the field is the expensive part for sure , been designing boards for a few multirotor designers over the last two years now but most the tools i had from earlier…"
May 7
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@Charles,  I could but I won't.  The PX4 original is in eagle.  Re-using the existing open source design and contributing back to it is easily worth $150. I tried kicad.  The libraries are simply awful.  Overall it…"
May 7
Charles lakins commented on Matthew Coleman's blog post The uNode
"you could use numerous FREE unrestricted design software packages even for commercial use like.. DESIGNSPARK (Free for commercial or non-commercial use, no limitations or licensing) kikad…"
May 7
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@Charles,  I did do the board design myself. It's the only way to get what I want and to properly review the layout.  That's an extra $150 for the private eagle license.  If I ever want to sell these things then that will be…"
May 7

Developer
Bill Bonney commented on Matthew Coleman's blog post The uNode
"Great work Mr Coleman. Also good to see new options, I'm sure you have learnt lots :-)"
May 5
Charles lakins commented on Matthew Coleman's blog post The uNode
"I like the size, why did you pay so high for the development did you not do the design yourself? or was it done by a board designer based on your needs? just wondering why you didn't fab a small batch through oshpark and populate yourself for…"
May 5
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@Ye, MAX21105 is more accurate than MAX21100 and cheaper. Availability was just a little too late for this project. It is cheaper since it does not have the motion merging engine that we can't use anyway. The interrupt mechanisms are simpler…"
May 5
Ye Wang commented on Matthew Coleman's blog post The uNode
"Good job! MAX21100 is very accurate based on its datasheet. Hope to get your test results soon!"
May 5
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@Roberto, I forgot to say that the debug connector is too deep to be mounted when fitted in the aircraft.  Anything but through hole connections is a no go. "
May 5
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@Bill,  Not much market at all so far. I did this to make sure that I have something that fit inside the aircraft. I don't plan to sell them since I will get into arguments with the local tax man and he will take most of my money…"
May 4
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@Roberto,  Not much difference apart from size.  If it doesn't fit inside the aircraft it is as much use as all the other options. AUAV-X2 comes in at 30*45mm which is smaller than the uNode. That will fit nicely in the autopilot…"
May 4

Moderator
Roberto Navoni commented on Matthew Coleman's blog post The uNode
"Hi Matthew , why do you think that your design is so different of our original design VR Brain 4.0 available until June 2012 :)  http://www.virtualrobotix.com/profiles/blogs/vbrain-coming Actually available in rev 5.2 in micro and standard…"
May 4

Profile Information

About Me:
Electronics and software engineer
Please tell us a bit about your UAV interest
Large autonomous gliders
Hometown:
Somewhere in England

Matthew Coleman's Blog

The uNode

Posted on May 3, 2015 at 4:35pm 29 Comments

A distributed and scalable autopilot architecture is attractive to me due to space and sensor positioning demands on my airframes.  The existing range of autopilots simply doesn't fit.  The uNode (microNode) is the result of my desperate attempts to fix this.  uNode is a very cutdown…

Continue

raspiHUD - Ground based HUD without FPV

Posted on August 2, 2014 at 4:00am 9 Comments

Being able to see what the autopilot is thinking in real time is a valuable tool for tuning autopilot behaviour.  FPV is normally used for this but I can't use it on my aircraft.  A good solution is to use minimOSD on the ground driving a video monitor.  I have had a few flights with this and it works very…

Continue

Anything you want mixing

Posted on May 16, 2013 at 3:10pm 5 Comments

I would like to introduce the community to a mixer method used to fly complex aircraft in manual, fly-by-wire and autonomous modes.

The main challenges of mixing are:

  • Flexibility to do anything you want.
  • Easy to use and prevents…
Continue

Fly-by-polar

Posted on April 28, 2013 at 10:18am 65 Comments

Airspeed control is critical when flying sailplanes.  You want to fly close to stall but never beyond it, since that will normally cause a tip stall and great loss of energy.  How do you teach an autopilot to fly on the edge of stall?…



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