Gary McCray
  • Male
  • Fort Bragg, CA
  • United States
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Gary McCray's Page

Profile Information

About Me:

I am the Owner and Author of these advertising-free informative web sites:
Now flying, rolling or under construction:
  • Hoverthings FLIP FPV Pro Quadcopter with Pixhawk, 14" props, KDE 515kv motors, telemetry, Sony AS100V Video Camera, Brushlesss Gimbal and FPV.
  • Custom CF tube H/dead-cat Quadcopter with Pixhawk, GoPro, Gimbal & FPV.
  • Hoverthings FLIP Sport Quadcopter with PX4.
  • ARF DJI FlameWheel 330 Quadcopter with PX4.
  • ARF DJI Flamewheel 450 Quadcopter with APM 2.5.
  • My design: Hanging pendulum style robot with two 26" brushless bicycle wheels.
  • Traxxas Stampede 4x4 Rover with PX4.

Professional History:
  • (Retired) Microcomputer Engineer, Hardware and Firmware.
  • (Past) Lead Editor of DIYDrones APMcopter, APMplane and APMrover wikis.

Please tell us a bit about your UAV interest
  • Reentry into RC Planes 3 years ago.
  • Lots of PIC hardware and C and assembler programming experience.
  • Currently interested in Quadcopter development, robotics, 3D vision, environment relative autonomous navigation, Linux, Beagle Bone, Odroid, TOF cameras and LIDAR.

Hometown:
Mendota Illinois

Latest Activity

Gary McCray commented on tazdevil's blog post Sony to begin developing drones with sony commercial sony sensor
"Sony does a lot of innovation and they often "attempt" to leverage their developments into exclusive devices that run counter to already established standards. Often this has not worked out the way they hoped  (monopoly dominating the…"
yesterday
Swift replied to Gary McCray's discussion Need RC PWM signal to 0-5 volts for my robot. in the group ArduRover User Group
"Sorry Philip.  My english writing is not so good. But I see your point."
yesterday
Phillip Schmidt replied to Gary McCray's discussion Need RC PWM signal to 0-5 volts for my robot. in the group ArduRover User Group
"My point wasn't against the use of the 328 (I'm a huge fan of it), it's just that the 20Mhz version is an oddball.  The standard 328 is usually run at 16Mhz, and is wildly more powerful than what you need (not that that is a bad…"
Friday
Swift replied to Gary McCray's discussion Need RC PWM signal to 0-5 volts for my robot. in the group ArduRover User Group
"Hi Phillip. I will use the ATMega328 just because it is the next level up on my book for a ATMEL micro. I'm  also looking for the usage of others IO to trigger a HackHD camera for arial mapping purposes.  Gary is looking for 0-5 volts…"
Friday
Swift replied to Gary McCray's discussion Need RC PWM signal to 0-5 volts for my robot. in the group ArduRover User Group
"Gary, I agree with you no need to accomodate SBus / PPM-Sum.  I just use the SBUS of my receiver to test attiny85 running at 8 MHz.  I'm glad you are on board for the ATMega328 and dip form factor.  A lot easier for prototyping.…"
Friday
Gary McCray commented on Tipu's blog post Hobbyking seems "Serious" now
"Certainly puts the cost of a true heavy lift copter more in reach. It will be very interesting to see how well these function in actual service."
Thursday
Gary McCray commented on tazdevil's blog post Sony to begin developing drones with sony commercial sony sensor
"Sure Sony is famous for trying to create proprietariness for no particular benefit to anyone - in the end especially themselves. But they are also famous for building a wide range of exceptionally high quality consumer electronics products that have…"
Thursday
Phillip Schmidt replied to Gary McCray's discussion Need RC PWM signal to 0-5 volts for my robot. in the group ArduRover User Group
"I really don't think you need to go to a 20Mhz processor.  Just use a standard 16Mhz unit.  If you're going to use a dedicated DAC, there's no advantage to the higher processor speed. Use the interrupts on pins 2 and 3 to…"
Thursday
Gary McCray replied to Gary McCray's discussion Need RC PWM signal to 0-5 volts for my robot. in the group ArduRover User Group
"Hi Eric, Totally on board with the ATMega 328, I was dubious of bandwidth as well especially to accommodate 2 PWMs / DACs. However, I am also not sure it needs to accommodate SBus / PPM-Sum. I think for most uses 2 independent single Radio control…"
Thursday
Gary McCray commented on Harry Olar's blog post A new cheap obstacle detector for robotics
"Hi Harry, This is an interesting development and certainly represents a price breakthrough for a scanning rangefinder. But I do have a bit of difficulty with the 2 comparisons you made. As I recall both of the other rangefinders have considerably…"
Wednesday
Gary McCray commented on healthyfatboy's blog post Ground/Air Drone Delivery
"Also the tethered object thing is wrong, the FAA provides no specific exemption for tethered objects and treat them exactly like untethered ones. And that includes balloons and kites. They may eventually decide to do otherwise, but at this point in…"
Wednesday
Gary McCray commented on Thomas J Coyle III's blog post Bend boy’s drone among those cited as ‘emerging hazard’ for forest firefighters
"Hi Tom, I agree that irresponsible quadcoptering reflects badly on us and the "authorities" and media love to hop on every example of it as justification for stomping "drones" into the ground. But it is also true that as this…"
Wednesday
Gary McCray commented on healthyfatboy's blog post Ground/Air Drone Delivery
"I doubt that Multicopter delivery of packages is ever going to become a common place occurrence. At most it will be used for either very special and important packages that need to be delivered under very singular circumstances, or for hype and…"
Wednesday
Swift replied to Gary McCray's discussion Need RC PWM signal to 0-5 volts for my robot. in the group ArduRover User Group
"After some work done on the bench... ATTiny at 8MHz will not do the trick. This is the code I used: /* ATtiny85    # 1 = (RESET) # VCC     # (Pin 3) = (PB3) # (Pin 2) SCK/SCL/PB2    # (Pin 4) = (PB4) # (Pin 1)…"
Wednesday
Gary McCray commented on Andrew Tridgell's blog post APM:Rover 2.46 released
"Great news Tridge, Iv'e been getting back to work on my 2 wheel hanging pendulum robot lately and this will come in very handy. Very interested in availability of PXF since BBB is where I am starting immediately after straight RC / FPV…"
Monday
Gary McCray replied to Yann Grandcourt's discussion Advice For Project !! (Urgent Please)
"Hi Yann, Multiwii is actually a valid flight controller choice and if cost is an over riding consideration it probably would allow you to get your project done for less than $500.00. It is not as capable as the Pixhawk and you will probably need to…"
Aug 24

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Gary McCray's Blog

New 1 at a time ESC calibration method for PX4 or Pixhawk

Posted on June 28, 2014 at 2:47pm 3 Comments

One of the Problems with the PX4 / Pixhawk is that it uses a PPM-Sum receiver which when so configured may not work at all for the normal receiver based method of one at a time ESC programming.

And especially so for 4 in 1 ESCs.

The one at a time method I have developed uses the Wikis…

Continue

Drones Are Fun an informational resource for everybody interested in UAVs, especially for personal use.

Posted on May 29, 2014 at 5:25pm 21 Comments

Hi everybody,

Gary McCray here, past wiki editor for DIYDrones, announcing my own Informational Web Site: http://www.dronesarefun.com/

I am very much strong advocate of our APM and Pixhawk flight…

Continue

BeagleBone Black available - if you're quick.

Posted on March 5, 2014 at 11:00am 32 Comments

Hi all, Beagle Bone Blacks are available at Adafruit this morning.

I wouldn't ordinarily put an Advertisement for a product as a Blog but as you may or may not know, Beagle Bone Blacks are seriously hard to come by.

Everybody is out of stock all the time, except a fewy unscrupulous dealers who…

Continue

I Really Need help solving a problem for all of us!

Posted on February 23, 2014 at 7:30pm 91 Comments

We have a great new Wiki / Manual which is actually being I think very helpful for all of us.

But there is a Huge - Seemingly Intractable Problem. At least in my estimation of things:

No the Iris isn't the problem, It's a really great 3DR copter, probably the best one available for the…

Continue

Comment Wall (3 comments)

At 8:14am on February 13, 2013, Jethro Hazelhurst said…

H Gary,

First off, thank you for the superb job on the F330 construction page and wiki table of contents.

I will Email you the Image so that you can put it where you see fit.

Many thanks again!

Jethro.

At 10:49pm on May 21, 2013, Jorge Antonio Saldaña Rosales said…

Hola que tal Gary sabes el hadware que necesito para hacer mi drone Cooperativo

At 5:17pm on May 22, 2013, Michael said…

Hi Gary,

Just a thing on shipping rates (from your comment). I was also mad because of high shipping. I sent support an email and they shipped the parts for free through standard mail! I got it in 2 days ( I live on the east coast). There is a size limit though, can't go above 13 oz, but for small parts its fine. Oh and btw, when you email them, ask for Lorena, it may take a day or 2 more because of her work hours, but she's been amazing with shipping like this.

 

Sorry this is the only way I could contact you!

 

Michael

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