John_Mac's Discussions
Progress Report on UAV DevBoard application to CCPM Helicopters
Started this discussion. Last reply by William Premerlani Nov 29, 2009. 125 Replies 0 Likes
Discussion of application of UAV Dev Board to CCPM RC Helicopters
Started this discussion. Last reply by William Premerlani Jan 24, 2011. 68 Replies 0 Likes
Failsafe functions
Started this discussion. Last reply by John_Mac Mar 17, 2009. 2 Replies 0 Likes
John_Mac's Page
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William Premerlani replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
Hi Florin,
I just measured the sampling rate of MatrixPilot 2.5.1, it is 1200 samples per second for each channel.
To raise it to 4800 samples per second, change the ADCS field in ADCON3 from 111111 to 001111.
You should also…
Florin Mingireanu replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
Hi Bill,
Can you indicate where and how the changes should be done in MatrixPilot 2.5.1 in order to raise the sampling rate at 5000 Hz?
In the UAVmanual available online it is also said that the sampling rate should be 5000 and that the servo…
John_Mac commented on Jordi Muñoz's blog post 'DIYDrones Magnetometer issue resolution'
My Magnetometer was bought from you in March of 2010. Item number BR-HMC5843-01. It has performed fine on an I2C interface.
I see no resistor marked 204. Does this rev require the "fix"?
John
John_Mac replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
Welcome Dragos
Thanks for this post. This is something on my TODO list. I have played around with integration of the accelerometers for position stabilization as well in the past, as well as looking at Optical Flow. Bill has…
Dragos replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
Hello everyone,
I'm trying to use the board for a VTOL model application and I'm addressing this Helicopter discussion thread because of need of stable hovering I need to achieve first.
The DCM algorithm and the board themselves…
John_Mac replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
Just an update....
Jerry and I have set up a Wiki on Google Codes with documentation and code for helis and quads at:
http://code.google.com/p/matrixpilotheli/wiki/TopLevel?tm=6
For helis, the code supports pitch and roll…
John_Mac replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
Hi Hari
Right now we only have a code that works on helis. I looked at the tricopter site and this looks like a very nice system. The first thing that struck me was that our system might be adapted to replace our 120 degree swash servo out put with…
Hari replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
can this autopilot be used in tricopter??
http://shrediquette.blogspot.com
or u hav any suggestion?
John_Mac replied to John_Mac's discussion 'Discussion of application of UAV Dev Board to CCPM RC Helicopters'
I have not been posting to this blog recently since we now have a Google Group dedicated to UAV Dev Board Heli applications at:
http://groups.google.com/group/UAVHeliBoard?hl=en
If you are interested, please sign up.
We have a working version of…
John_Mac commented on William Premerlani's blog post 'DCM IMU Theory : first draft'
Bill
Sorry, didn't see the entire thread. As you mentioned, the coaxial should give good intrinsic stability, so could be a good platform for just steering. I would still look at payload....but might work fine as long as no additional…
John_Mac commented on William Premerlani's blog post 'DCM IMU Theory : first draft'
Well just suggesting you make sure it can handle the payload.
I don't know your skill level, but some people go with something like a CX2 coaxial to get a feel for helis, then go to a larger bird. But if you can do both with the Lama, good…
John_Mac commented on William Premerlani's blog post 'DCM IMU Theory : first draft'
Abdulrahman
I forget the details of the Lama. I have a CX2 and it does not have enough lift to carry the UDB and associated components. My TREX 450 does and I have the DB installed on it. You may want to check payload.
Best,
John
John_Mac commented on Brian Wolfe's blog post 'PicPilot/Y UFO musings'
Thanks Brian
I have been using Bill's UDB with the Red Board gryros swapped out with ADXRS610 gyros for less vibration sensitive versions and with 300 deg/sec max rates (Green was only 75 I think) on my TREX 450. Works OK but I think I still…
John_Mac commented on Vassilis's blog post 'Testing of the CHR-6D IMU and DCM in a quad-rotor'
Great thank you...do you have a picture of the potted board?
John
John_Mac commented on Vassilis's blog post 'Testing of the CHR-6D IMU and DCM in a quad-rotor'
Can you give more details of the gel potting you did?
John
John_Mac commented on Brian Wolfe's blog post 'PicPilot/Y UFO musings'
Brian
Have you used your PICpilot on a heli? If so can you give me the link?
Thanks
John
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