"Catastrophic.."
Developer
-
John Arne Birkeland
- Male
- Norway
- Blog Posts (10)
- Discussions (74)
- Groups
- Photos
- Photo Albums
- Videos
John Arne Birkeland's Discussions
Problem maintaining pitch when accelerating / decelerating.
Started this discussion. Last reply by Michael Zaffuto Jul 2, 2010. 29 Replies 0 Likes
Servo problem with the new red (328) cards?
Started this discussion. Last reply by Chris Anderson May 3, 2009. 22 Replies 0 Likes
John Arne Birkeland's Page
Latest Activity
DeveloperJohn Arne Birkeland replied to Brad Smith's discussion What do you think the APM should do on fail safe
"There has been no change in the encoder logic, so I have not done extensive testing with different systems. Just the usual latency and timing tests with a scope using my regular Futaba radio and the FASST system. Only difference now is that if you…"
DeveloperJohn Arne Birkeland replied to Brad Smith's discussion What do you think the APM should do on fail safe
"Jake: The PPM Encoder as the name implies, outputs a PPM stream to the APM main chip. It is impossible to skip a channel since a standard PPM signal is a pulse train with 8 channel values, where all channels must contain a value."
DeveloperJohn Arne Birkeland replied to Brad Smith's discussion What do you think the APM should do on fail safe
"I have updated the ArduPPM firmware for the APM2 (v2.2.67) so that it will detect a missing throttle signal and set the the throttle value to 900us. APM1 version will come later.
Binaries:…"
DeveloperJohn Arne Birkeland replied to James Dinh's discussion Should I remove all the red and black servo wires, except for 1 pair?
"Keep the black ones (ground), so that you know for sure that you have common ground for the control signal (white wires)."
DeveloperJohn Arne Birkeland commented on Chris Anderson's blog post Housekeeping note: Kevin Finisterre
"There seem to be some miscommunication here. I just noticed that all comments from what I assume is the person in question has been removed."
DeveloperJohn Arne Birkeland replied to Brad Smith's discussion What do you think the APM should do on fail safe
"Yes and no. It makes sense during initial testing, but once the new firmware is confirmed stable it would become the factory standard. I think we want to keep the ArduPPM as uniform as possible among all users."
DeveloperJohn Arne Birkeland replied to Brad Smith's discussion What do you think the APM should do on fail safe
"The atmega32u2 in APM2 comes with a DFU bootloader by default, enabling USB firmware updates of the ArduPPM. If you have programmed it manually using ISP, you have most likely overwritten the DFU…"
DeveloperJohn Arne Birkeland commented on Azam Shahani's blog post Impressive new camera gimbal
"Emin: This is totally off topic, but since you mentioned servocity.com.
I stopped using them <period> after I discovered that they patented the use of sprockets on servos. That is slapping the whole robotics community in the face, and a…"
DeveloperJohn Arne Birkeland replied to Brad Smith's discussion What do you think the APM should do on fail safe
"There was a long discussion on FS behavior, and in the end it was decided that mode 4 was the most "king". But channel 5 is also used to set modes during normal operation, so it is not a dedicated FS channel. The only true failsafe…"
DeveloperJohn Arne Birkeland replied to Brad Smith's discussion What do you think the APM should do on fail safe
"OK let's try dealing with a specific case related to failsafe performance, instead of all this high level abstraction going on.
ArduPPM (ppm encoder) failsafe and throttle channel:
First some back story. Reading PWM signals from up to 8 R/C…"
DeveloperJohn Arne Birkeland commented on Gareth Rens's blog post APM2 conversion to Naza
"Nobody questions that APM can be a very good performer, but unless you are lucky with the frame you have to tweak PID's and experiment to get there. People are discovering that with the Naza they pretty much just have to install it and it will…"
DeveloperJohn Arne Birkeland commented on Chris Anderson's blog post OpenROV in the New York Times
"From the video, "I always fail my way to success."
Great quote, that describes DIY in a nutshell.
"
DeveloperJohn Arne Birkeland commented on Azam Shahani's blog post Impressive new camera gimbal
"Not sure about the time frame, but looks like I will get access to a S800 + Z15 gimbal system. I'll take some detailed pictures of the design when I do."
DeveloperJohn Arne Birkeland commented on Azam Shahani's blog post Impressive new camera gimbal
"Emin: .90 helicopter tail boom (25mm) http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10681
The irony is that those $2.99 metal booms are much better then "fake" $30 carbon fiber ones."
DeveloperJohn Arne Birkeland replied to James Dinh's discussion lowest safe voltage per cell on lipo
"The Quanum 2.4ghz Telemetry System is a nice stand alone system used for that. Great when you fly traditional R/C.
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10343"
John Arne Birkeland's Blog
Confessions of a gadget addict...
Posted on May 1, 2012 at 12:40pm 35 Comments 12 Likes
I am probably going to get hate mail for this, but a clear warning to any future addicts needs to be made. So here goes.
I was doing some spring cleaning and those darn DIY gadgets just kept on coming out of the woodwork. I knew I had a lot of stuff lying around, but this time I even surprised…
ContinueWatertight Android tablet. The perfect groundstation?
Posted on March 4, 2012 at 5:00am 5 Comments 2 Likes
http://www.youtube.com/watch?v=Nmp4zzl2pfo
Some of us, do not live in California with 300+ sunny days in a year, and have to cope with rain and bad weather. The new watertight Fujitsu Arrows Tab looks to be perfect for such days.
CircuitLab - Online electronics simulator
Posted on February 29, 2012 at 12:47am 6 Comments 4 Likes
I just discovered CircuitLab, a online electronics simulator. I haven't had time to play much with it yet, but it looks very promising from what I have seen so far. Especially considering that they just launched the site.
Full scale octocopter
Posted on October 9, 2011 at 11:30pm 8 Comments 5 Likes
Comment Wall (5 comments)
- At 3:30am on April 17, 2011,
thomas marschall said… - Hei
Fant deg her på diydrones og tipper du har arducopter? Jeg prøver å kartlegge antall piloter i Norge for
å skrive en artikkel om dette.
Også skal vi i løpet av året organisere en arducopter / uav dag og du er kanskje interessert?
--
Vennlig hilsen / with regards
Thomas Bjørn Marschall
- At 3:31am on April 17, 2011, thomas marschall said…
- Hei
Fant deg her på diydrones og ser du kanskje har arducopter? Jeg prøver å kartlegge antall piloter i Norge for
å skrive en artikkel om dette.
Også skal vi i løpet av året organisere en arducopter / uav dag og du er kanskje interessert?
--
Vennlig hilsen / with regards
Thomas Bjørn Marschall
- At 6:31pm on April 17, 2011,
DeveloperJohn Arne Birkeland said… - Heisann. Har vel strengt tatt ikke et arducopter da jeg liker å bygge mest mulig selv, men flyr quad mm. ja. :) Noe samling høres moro ut.
- At 9:30pm on September 1, 2011,
Ravi said… Hi john, i am able to get PPM output from a PIN of Thomas Scherrer 12 channel receiver. is the PPM sum signal compatible with the ATmega2560 PPM decoder or i have to decode it through a interface. actually i am more of an aircraft engineer and less of a electronic engineer. the signal is coming from a Futaba 7C Tx onto a 12 channel thomas Sherrer Rx on 12 channel pin. can i give it directly to PIN 1 of APM after shortening PIN 2 &3 or i have to use an interface using PPMencoder. please help. i am currently using APM2.23. thanx, ravi
- At 3:43am on September 2, 2011, Ravi said…
Hi john, i tried giving PPM to channel 1 PIN of APM and shortend PIN 2 & 3. did not work. I am not getting PWM out to servoes. Thomas Scherrer Rx takes PPM pulse from Futaba 7C Radio. It has a UHF RF Module which has been connected to the PPM out of Futaba 7C, this drives a 12 channel Rx also designed by Thomas Scharrer. I think the PPM pulse form futaba 7C should pass on as it is to the Thomas Scharre Rx which has a PIN for direct PPM out? what should i do next.
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