Patrick Duffy
  • Male
  • Manor, TX
  • United States
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Patrick Duffy's Friends

  • Ashley Webb
  • TopXGun
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  • Brad Focht
  • Nery Nogueira
  • Brian Buckmaster
  • Richard Dobbins
  • Patrick Poirier
  • Richard Postma
  • Asier Martínez
  • Keith G
  • T Edelen
  • Warren Fernandes
  • Kevin Goff

Patrick Duffy's Groups

Patrick Duffy's Discussions

Arduplane RTL crash Skywalker X8 plane.

Started Dec 24, 2015 0 Replies

I had a crash flying a big wing (Skywalker x8), when I hit the RTL switch, the plane started to pitch/roll wildly and crashed. The plane was flying at 30 meters, and the RTL altitude was set to 100…Continue

Tags: crash, Arduplane

Arducopter 3.2.1 throttle failsafe always lands, no RTL or continue mission.

Started this discussion. Last reply by Patrick Duffy Sep 18, 2015. 2 Replies

Does anybody have this problem? Throttle failsafe always lands with Arducopter 3.2.1 no matter what the setting is, RTL or Continue Mission.  I have tested this several times by hovering and just…Continue

Illegal drone use could threaten hobby

Started Apr 22, 2015 0 Replies

I saw this on the DrudgeReport report today:…Continue

Crash with Arduplane 2.76, in FBWA mode

Started this discussion. Last reply by Patrick Duffy Jan 12, 2014. 6 Replies

Had a bad crash today flying in FBWA, with a plane that has logged 100+ flights without any issues. Only change was upgrade to 2.76. Was flying level at full throttle, and the plane just took a nose…Continue

 

Patrick Duffy's Page

Latest Activity

Patrick Duffy commented on Patrick Duffy's blog post How to control a GoPro Camera on APM/Pixhawk with a Raspberry PI using WiFi
"@F Javier Marin,  you could use a pi zero if you use the usb port to connect a wifi dongle, or use the new Pi zero that has wifi. "
Sep 12
Patrick Duffy replied to Randy's discussion figuring out the Antenna Tracker
"I used this gearbox/servo on my tracker for 360 deg rotation.  Not cheap but works great. https://www.servocity.com/bm-785hb-servo-gearbox"
Sep 12
Patrick Duffy replied to Randy's discussion figuring out the Antenna Tracker
"@Jean-Marie PRIGENT For the digital connection, I am using a Raspberry PI on all my UAVs to transmit both HD video and telemetry.  There are a few options for video, but usually I just mount the cheap $25 PI cam on gimbals.  It is…"
Sep 10
Patrick Duffy replied to Randy's discussion figuring out the Antenna Tracker
"@Greg Covey, I have a Robo 3d R1 printer, and printed everything except the PVC pipe I used to connect the base to the tilt servo.  I purchased the gear assemblies and servos from servocity.com, and designed the 3-d printed parts to fit the…"
Sep 10
F JAVIER MARIN commented on Patrick Duffy's blog post How to control a GoPro Camera on APM/Pixhawk with a Raspberry PI using WiFi
"Hola Patrick. seria posible hacer esto mismo con una raspberry pi zero y aplicarlo a otras camaras de accion tipo xiaomi o similares? Gracias y saludos."
Sep 9
Patrick Duffy replied to Randy's discussion figuring out the Antenna Tracker
"@DougB,  I will post a blog shortly on how to build the entire tracker from scratch, including STL files, software, and assembly instructions."
Sep 7
Patrick Duffy replied to Randy's discussion figuring out the Antenna Tracker
"Here's a photo of the 3-d printed tracker I built that works with the MissionPlanner tracker API.  If anybody is interested I can post the STL files.  The dish is a Ubiquity Nanobeam 5.8ghz version. "
Sep 7
Patrick Duffy replied to Randy's discussion figuring out the Antenna Tracker
"@Jean-Marie,  I will post instructions for the updated tracker here : http://diydrones.com/profiles/blogs/how-to-build-an-fpv-antenna-tracker-for-use-with-mission-planner The newer setup is similar, but uses a digital connection to the…"
Sep 4
Patrick Duffy replied to Randy's discussion figuring out the Antenna Tracker
"I abandoned the antenna tracker in favor of the Mission Planner tracker which works very well. It's simple and needs no GPS or compass.  My setup includes a 5.8ghz dish antenna, and a modified version of Mission Planner that tunes the…"
Sep 4
Sat commented on Patrick Duffy's blog post Part 2: How to build a High-Definition FPV UAV using a Rasperry PI with HD camera, using a high speed WiFi link
"Hi @Patrick. I like your post, very interesting. I wonder if it is possible to not use the 6 ch. radio rx (and also the radio tx) and just send the flight command (pitch, yaw, etc.) to the UAV from the ground station like this ground station -->…"
Aug 16
Patrick Duffy commented on Patrick Duffy's blog post How to setup a Mission Planner HD-Video HUD using GStreamer and Mission Planner plugins
"@Rogue,  Try this string:  rtspsrc location=rtspu://admin:admin@192.168.100.103:554/cam1/h264 latency=50 ! decodebin3 BTW,  I have posted a new version of the app in the play store, and also on the dropbox that has many enhancements…"
Aug 1
Roque CANALES commented on Patrick Duffy's blog post How to setup a Mission Planner HD-Video HUD using GStreamer and Mission Planner plugins
"Hello Patrick I test your android App "QTGstreamer HUD" And I can't view the video that work on my windows laptop following gstreamer pipeline below: gst-launch-1.0.exe rtspsrc…"
Aug 1
Patrick Duffy commented on Patrick Duffy's blog post Part 2: How to build a High-Definition FPV UAV using a Rasperry PI with HD camera, using a high speed WiFi link
"@Ashley, I am using the MissionPlanner tracker, not ArduTracker.  I was using the ArduTracker setup with a Pixhawk and a Raspberry Pi to feed the Pixhawk telemetry from the Ubiquity connection.  With continuous rotation servos and it was…"
Jul 21
Ashley Webb commented on Patrick Duffy's blog post Part 2: How to build a High-Definition FPV UAV using a Rasperry PI with HD camera, using a high speed WiFi link
"Hey @Patrick! I've got my ubiquiti set up working with my rpi running apsync. I'm now trying to get my antenna tracker running with my ubiquiti antenna on it. Are you able to bypass the 3dr radio? Ive tried a pixhawk on the tracker with…"
Jul 21
Patrick Duffy commented on Patrick Duffy's blog post Google Cardboard Head-Up Display for Android
"There's an update to the app on the dropbox.   A few new features like stream swapping has been added. https://www.dropbox.com/s/iysadmr511nvwlr/QtGstreamerGoogleCardboard.apk?dl=0"
Jul 18
Rana commented on Patrick Duffy's blog post Part 2: How to build a High-Definition FPV UAV using a Rasperry PI with HD camera, using a high speed WiFi link
"Hi Patrik, Thanks for your wonderful work. In EZ_WifiBroadcast, what is done is the transmission band is shifted away from the regular wifi band by making modification in the linux driver /firmware for USB-WiFi dongle so that it does not interfere…"
Jun 17

Profile Information

About Me:
I am a Sr. Software engineer for ETS-Lindgren and work on antenna analysis software for the wireless industry.
Please tell us a bit about your UAV interest
I have a plane with ArduPilot, and am interested in development for this project.
Hometown:
Manor, TX

Patrick Duffy's Blog

Thermal Imaging for your Drone on a Budget

Posted on May 6, 2017 at 12:13am 61 Comments

This blog will describe how to add thermal imaging to your drone without breaking the bank! The above photo shows my drone with the thermal imaging camera, the FlirOne device, which is an inexpensive, lightweight…

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Google Cardboard Head-Up Display for Android

Posted on July 12, 2016 at 2:26pm 17 Comments

Google Cardboard your Drone!

This is a new Android App for running a Heads Up Display on a SmartPhone using Google Cardboard glasses to hold the smart phone.

I have posted a free version on dropbox…

Continue

Chinese drone maker Ehang Inc. Unveiled World's first drone capable of carrying a human passenger.

Posted on January 6, 2016 at 4:26pm 43 Comments

LAS VEGAS (AP) — Chinese drone maker Ehang Inc. on Wednesday unveiled what it calls the world's first drone capable of carrying a human passenger.

The Guangzhou, China-based company pulled the cloth off the Ehang 184 at the Las Vegas Convention Center during the CES…

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Ford issues $100000 challenge for developers to create drone to vehicle communication system

Posted on January 5, 2016 at 8:00pm 27 Comments

Here's the :Link

The news release said, "CEO Mark Fields said a goal is to set up a system, for example, where a…

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Comment Wall (5 comments)

At 9:12am on January 28, 2015, Warren Fernandes said…

Hey Patrick,

The issues that we're facing are not really related to the video link, that's perfect. Our telemetry link that uses zigbee 900's for communication completely stops transmitting as soon as the plane takes off. The connection comes back as soon as the plane lands, also our plane is built out of carbon fiber which we assumed was blocking the signal from our top mounted antenna. However shifting the antenna to the bottom of the plane hasn't helped. We've range tested our zigbee's and they seem to have no problem communicating over long distances, which has left us quite puzzled. Do you have any idea why this might be happening? I'll sent you pictures of the plane tomorrow!   

At 10:34am on January 28, 2015, Patrick Duffy said…

Hello Warren.  I have a similar setup on one of my fly wings. 5.8ghz video / 900mhz telemetry with zigbee. It's an EPO foam plane, so I have no issues with the carbon fiber, however, you should not have an issue if the antenna is bottom mounted. I would be interested to see your setup. It does sound strange. Have you eliminated cabling problems or connector issues? From your description of the problem, it appears that the actual radiated power is very low and it works as soon as the receiver gets close to the transmitter on the ground. I would try just walking the plane away from the CGS to see when it drops. 

For my latest build, I have both video and telemetry going over 5ghz digital so I have eliminated the 900mhz and extra electronics/antennas.  Are you using analog video or HD? Maybe you should consider eliminating the 900mhz link altogether. 

At 12:50am on January 30, 2015, Warren Fernandes said…
We're using HD video and we're definitely considering using the wifi link to transmit telemetry. However, we wanted the two separate radio links as a failsafe. We've tested our 900MHz system at fairly large distances (~1km) and it works perfectly outside the aircraft. The problem only crops up when the electronics operate inside the airplane :P.
Thanks for the help, I'll send you pictures of our setup soon so that you get a better idea of what our setup looks like.
At 6:24am on June 4, 2015, Paul Meier said…

Hello Patrick, stumbled on this in the http://diydrones.com/forum/topics/3-km-hd-fpv-system-using-commodity-hardware tread:

http://www.msdist.co.uk/product_Ubiquiti-WispStation-M5.php

seems its the same specs as the bullet, no need to mod for the antenna

At 4:10pm on March 31, 2017, Ashley Webb said…

@Patrick, I have PI 3 but I can pick up a PI 2 if there are any issues with the image running on a 3. Thanks so much!!!

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