About

Gender

Male


Location

Stockholm


About Me:

Electronics and software engineer


Please tell us a bit about your UAV interest

Large autonomous gliders


Hometown:

Somewhere in England


Activity Feed

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?"
Aug 31, 2015
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 you can make…"
Aug 24, 2015
Matthew Coleman commented on Thomas J Coyle III's photo
"Congratulations.  You have some extra awesome married into the family."
Aug 5, 2015
Matthew Coleman commented on Thomas J Coyle III's photo
"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, 2015
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 comes across as the  brainchild of…"
May 7, 2015
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 an extra $500.
As I said…"
May 7, 2015
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 and I…"
May 5, 2015
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, 2015
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 away.  I might get…"
May 4, 2015
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 space I have.…"
May 4, 2015
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@Mark MAX21100 is one of the lower cost sensors.  Around $3.50 @ 1k volume.  It doesn't make any sense not to put it on.  It will make a nice backup autopilot with an extra gps somewhere on the bus system.
The 64Mbit memory is about $1.  I would put…"
May 4, 2015
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@James Pike - That is pretty much my thinking also.  Thanks for the feedback.

@ben @thomas  The FFC or sensor damping idea is nice but simply not for this project.  Any additional connectors add too much size.  I am already concerned that the power…"
May 4, 2015
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@James Pike.  Out of curiosity what would you use it for?

@Kees.  I have not decided on the configuration yet bu it is at least three.  Two for the wings and one as a failproof.  Then the autopilot of choice plugs into that system.  If all the…"
May 4, 2015
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@Mark,  debug is working after I discovered the bootloader update.  I used it to get the qgc mavlink-ftp file upload working.
It looks like I am using rev Y silicon.  How fu**ed am I?

I could do with getting some good luck on this project for a…"
May 4, 2015
Matthew Coleman commented on Matthew Coleman's blog post The uNode
"@benbojangles, I am not a company so this was funded with my pocket money.  Anything other than very simple is too high risk and too likely to need respins.  The prototype cost already runs at $1500.  MAX21100 cost is low and flexi proto pcb cost is…"
May 3, 2015
Matthew Coleman posted a blog post
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…
May 3, 2015
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