John Church
  • Male
  • Mesa, AZ
  • United States

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John Church's Groups

John Church's Discussions

cm. resolution GPS on Kickstarter

Started this discussion. Last reply by Alex Wheeler Aug 5, 2013. 1 Reply will have bragging rights?What is RTK?A…Continue

AC 3.x on Quanton 32 bit HW

Started Jul 25, 2013 0 Replies

I've been playing with the Tau Labs firmware for their Quanton board and, while I am sure it will mature eventually, really want to try AC 3.x on what seems to be a stellar piece of hardware (I do…Continue

Tags: tau, quanton

AVR Python VM

Started Aug 31, 2011 0 Replies

Unlimited program space on an AVR anybody? Try this AVR Python VM on for size. With the ability to run programs from SD card, imagine the possibilities... What would you do? …Continue

Tags: VM, AVR, Python

CrazyFile tiny quad

Started Apr 29, 2011 0 Replies

This was posted over at Hackaday and I had to share: Continue


John Church's Page

Latest Activity

John Church commented on Dan Wilson's blog post Autonomous Airborne Docking for Refueling or Recharging
"Totally sweet; Now they can find their own food. The end is near... :D"
14 hours ago

John Church commented on Oscar Avellaneda-Cruz's blog post Lost Developer Edition Iris on ebay...
"I think Jason and friends had an Iris go bye-bye in the area..."
Sep 10, 2014

John Church commented on Jose Luis Cortes's blog post Huge quadcopters can be attractive alternative to fixed wing for mapping and survey
"Yes, Andrew, but FDM is not the only 3d printing process ;)"
Aug 18, 2014

John Church commented on Ioan Ghip's blog post HK Pilot32 (Pixhawk clone)
"You don't have to run ardupilot on any derivative or clone board. Keep that in mind."
Aug 5, 2014

John Church commented on Ioan Ghip's blog post HK Pilot32 (Pixhawk clone)
"Looks nicer than that witespy variant. And a 10s power module..."
Aug 5, 2014

John Church commented on Max Levine's blog post Autoquad just got smaller :)
"Hey, Bill, what's this quatos stuff? I can't find much about it over on autoquad."
Aug 4, 2014

John Church commented on Sandro Benigno's blog post Why FRSky CPPM signal is so disappointing. [UPDATED]
"If it's in wii, it can be in APM  :)  Let's get a dev.'s eyes on this to cover the base. JAB, you in here?"
Jul 28, 2014

John Church commented on Randy's blog post Red Balloon Finder
"Hi Randy, have the arducopter code mods that support this made it to master, or are we working in your branch listed above? tnx!"
Jul 13, 2014

John Church commented on Rob Thompson's blog post DJI Phantom 2 - Attacked by Police Helicopter at Great Falls VA
"Yes, we should all know the rules of where we fly. But, that shouldn't mean aircraft should be crashed. You know the model pilot would have been held liable if the heli had caused it to crash into a kayaker."
Jul 9, 2014

John Church commented on Chris Anderson's blog post AMA response blasts FAA
"I have been flying models for over 25 years and am only now ashamed to say that I never supported the AMA by becoming a member. Registering ASAP."
Jun 24, 2014

John Church commented on John's blog post Drone outside apartment window prompts call to Seattle police
"Remember, just because you see a drone, it doesn't mean the drone sees you."
Jun 24, 2014

John Church commented on Andy Jensen's blog post 3DR International Shipping Update
"I don't know- I heard the same thing. .. :-D;-)"
Jun 2, 2014

John Church replied to Guerrilla Drone's discussion APM 2.6 Flip FPV not Taking Off at all not enough throttle power
"Can you post photos of APM installation and note the front of the quad?"
May 27, 2014

John Church commented on Jethro Hazelhurst's blog post A DIY Magnetic Prop Balancer!
"Hey, Never in all my years has the clear chipped or peeled away. Even on flimsy props. I suppose you could dig up arguments against it out there, but it works. As for CF, no issue sticking to that epoxy."
May 7, 2014

John Church commented on Jethro Hazelhurst's blog post A DIY Magnetic Prop Balancer!
"Looks nice Jethro. What to do when you have a need to balance... Well, I am not a fan of tape- any sort. I've just had bad luck with tape. Also, I would never remove material from a prop or blade. What I DO use is clear nail polish on the…"
May 7, 2014

John Church replied to xoltri's discussion Pixhawk causing motor sync issues.
"Regarding connecting ground, it might be a good idea to update the Pixhawk manual as well. The images in the "Connecting Outputs" section are a bit…"
May 5, 2014

Profile Information

About Me:
LAN engineer by trade, electronics engineer, musician, RC enthusiast at heart.
Am an RC helicopter nut. Co-workers call me "President of the helicopter club"...
Currently have 2 Hirobo Leptons and Trex 600 as experimental platforms for autonomous CCPM.
Please tell us a bit about your UAV interest
Being the ultimate gadget, I must be involved in the UAS scene. Always had an interest in and hobbies involving robotics, electronics and RC.
Currently Mesa, AZ

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John Church's Blog

Drop zone toys (manipulating servos via APM)

Posted on April 25, 2012 at 9:14pm 0 Comments

So, over the Easter weekend I had some time in the lab and threw together a crude repeating egg dropper for the quad. Of course, keeping me in line and the cops at bay, the other half talked me out of my nefarious plan to deliver raw, yolked goodies from above and instead had me whip up a tennis ball dropper to entertain the dog.

I've seen a lot of questions about manipulating servos with APM to either click the shutter on a camera or squeeze an airsoft trigger, so here's my…


Comment Wall (2 comments)

At 8:45am on August 22, 2011, Brent said…

Thanks for responding John, I can read and write with the RFmagic software in win7 64bit by opening the program and running as admin. if I don't run it that way it gives a strange character error message on opening. So I think the modules are be recognized OK, I have downloaded the Silax labs drivers and the APC220 shows in device manager on com port 4.

I have set the baud rates in software to rf192k and serial 57k with "write succeed" then in device manager under advanced tab and also in mission planner to com 4@ 57k

Hit connect button and planner immediatly goes to "recieving paramaters" a good sign but it then errors out and asks about cli switch position. Sometimes it will show batt voltage and gps fix though before the error, like it sent a small bit of data.

In terminal mode it shows a heartbeat so I think the modules are alive and OK.

Do you set RF 19200 and serial 19200 in the sotfware and write?

Do I need to change anything in configH with arduino022?



At 10:04am on August 22, 2011, Brent said…

OK will do, I am on a work trip so will not be able to play with them until later this week but I will let you know.


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