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Smoked my Turnigy 9X - Need help identifying a component

Started this discussion. Last reply by Dany Thivierge Dec 20, 2011. 4 Replies

Lockheed's Thrust based UAV

Started this discussion. Last reply by Doug H. Feb 24, 2009. 11 Replies

Thermopiles - Analog or Digital ?

Started this discussion. Last reply by Dave_fr Aug 22, 2009. 19 Replies


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McKinney TX

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Paul hubner's Blog

ArduCopter Frame Mod with Detachable Arms

Posted on December 21, 2010 at 10:00pm 2 Comments

I ride a motorcycle and the assembled quad just won't fit on the bike.  I have made a few modifications to the Arducopter kit as manufactured by Jani @ Fah Pah.  My mod makes the arms easily detachable with a few more parts. You'll need:

- eight 1/4" spacers (I bought at the local hardware store)

- four bolts similar to the 20mm in the kit

- four wing-nuts or threated spacers that you can grip (for the four bolts above so you can finger tighten…


NASA Ames Excursion

Posted on September 3, 2009 at 1:30pm 2 Comments

I was fortunate to be a part of the DIYDrone trip to NASA Ames Research Center (ARC) yesterday at Moffett Field in Santa Clara. We were treated of wide variety of conversations with NASA's UAV professionals including Chad Frost, our sponsor for the day. (Thanks Chad and everyone else @NASA!). For those who couldn't make it, here is a little writeup of the excursion:…


Propeller: Google Earth GPS SD Card Logger

Posted on July 8, 2008 at 11:30am 4 Comments

One of my goals for my UAV has been to use Google Earth as the tool to display flight paths, and next to create a waypoint list visually. Why reinvent the wheel right?

Well I'm halfway there. This logger writes Google Earth Compatible KML files onto an SD card for direct use with Google Earth. Plug it in to your PC and click… Continue

2003 Atlantic Crossing UAV

Posted on March 4, 2008 at 9:54am 5 Comments

I read about Maynard Hill when he sent this UAV across the Atlantic in 2003 but I though that there might be a good number of us who never read the story.

or for the kids:…


Loose LiPos Sink Ships

Posted on December 28, 2007 at 7:43pm 3 Comments

New rules from the DOT concerning airtravel and LiPo batteries. Thank goodness we have reliable Plastic Bags to protect us!!


Comment Wall (7 comments)

At 9:25pm on August 19, 2007, Jeffrey Johnson said…
Hi Paul, Just saw your post about GE integration. Are you going to be there for Chris' fly-in next weekend? If so, you wanna get together so we can maybe fly one of our phones with the Soft on your bird? Anyway, would like to get you using this if you are up for it.

At 12:56pm on August 20, 2007, paul hubner said…
Thanks Jeff,

Unfortunately I'm not able to be there this time around. I'm jealous I won't be on TV (guessing the Wired TV crew might be there...)

Thanks for the offer to use your kit. I hope it stands until Im able to see you guys!
At 11:41am on February 19, 2008, James Hall said…
How come in the following PUB module that I am executing via a separate COG, The Rx Inputs that I am receiving for channels 1-4 and 6 stop when I flip the gear switch (channel 5) ?

stackRxPass1 := bs2.Pulsin(RxInput1, 1)
stackRxPass2 := bs2.PULSIN(RxInput2, 1)
stackRxPass3 := bs2.PULSIN(RxInput3, 1)
stackRxPass4 := bs2.PULSIN(RxInput4, 1)
stackRxPass5 := bs2.PULSIN(RxInput5, 1)
stackRxPass6 := bs2.PULSIN(RxInput6, 1)

if stackRxPass5 > 770
stackGear := 0 'Off
laststackgear := 0
stackGear := 1 'On

This is curious. I want to continue to have control of all channels when I flip the gear switch in the scenario I am working on.
At 2:35pm on February 20, 2008, paul hubner said…
Thats a good question - assuming the code is working before you toggle the switch and your indentations are correct (this is important in SPIN - I learned the hard way), there should not be any issue from what I read. have you checked to see that you are displaying the correct data? I have mine setup to have a discrete input and output arrays so i can continue to accept inputs while the autopilot code enabled. This allows alternate uses of the sticks (like pan camera or drop item, etc)

If you look at my first code this displays both in and out variables and might help you.

Let me know how it goes!
At 7:40pm on May 22, 2008, Harrison Jones said…
I was wondering if you could help me with creating the schematic for a SD socket. I noticed that with your application of the SD socket you had various resistors connected to some pins. Why do you have these resistors and what pins are they on? I thought SD cards use 3.3 logic and supply so resistors wouldn't be needed. I assume I'm wrong?
At 3:08pm on May 28, 2008, Mike Anderson said…

I was reading this forum discussion:

wherein you mentioned that:

"...instead I use a small Canon HD camera (TX1 720p) on the plane that down converts to NTSC in real time for my video transmitter. That way I get compatibility for flight time and HD for posterity. "

If I understand this correctly, what you are saying is that you are able to compress the video into a small enough format that it can be transmitted (via 2.4 GHz or the like) back to your ground station in real time, while the camera is recording in HD. That way you can see exactly what the camera is doing, albeit, at a lower resolution.

I read through 18 pages of forum discussions to find this, and I'm very excited, if that is indeed what you can do.

I'm a mechanical engineer, so I'm good with forces and stress and whatnot, but the computer/Electrical jargon goes over my head. So finally my question: What do you mean by "down converts to NTSC"? How do you do this, does the camera do this automatically, or the video transmitter? Is there other hardware required?


At 12:32am on December 4, 2008, Ben Levitt said…
Hi Paul,

I wanted to point you to my budding Propeller-based autopilot. It's called Octopilot and I'm hosting the project on google code here. I took a lot of ideas from PNav, and wanted to say thanks. :)

I think I recall reading that you were interested in standardizing the code between yours and a few other projects. I'd be interested in joining in that fun!


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