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baberdk
Joined: 23 Jan 2014 Posts: 53 Location: East Moline, Il
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Herbgh(at)nctc.com Guest
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Posted: Sun Nov 22, 2015 6:53 am Post subject: Auto Pilot |
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The actual electronics is certainly similar to the 10 Dof board...."degrees of Freedon"... it incorporates a solid state 3 axis qyro,Triple axis magnetometer, 3 axis accelerometer..and barometer for altitude.... $7 dollars and 47 cents.. on ebay.. Think I paid 9 bucks...
It can be set up to communicate with the Arduino processor board...which can be programmed to communicate with a display and to drive the servos. The processor board cost 5 bucks or so..mostly from China or Hong Kong for the knock off versions.. The original Arduino was developed in Italy...and therefore cost more...
the 10 dof is the size of ones thumb...and the Arduino is credit card size...
I got the hots for an auto pilot experiment for my current Firefly....and bought these two boards along with the Raspberry Pi (35 bucks) which is also capable of taking the 10 dof board inputs...and driving a video display...
Most of the canned software is out there... written in some version of C language..
You tube has several videos showing the operation of a makeshift auto pilot using these devices...Herb
On 11/22/2015 07:29 AM, Denny Baber wrote:
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baberdk
Joined: 23 Jan 2014 Posts: 53 Location: East Moline, Il
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Posted: Mon Nov 23, 2015 7:49 am Post subject: Auto Pilot |
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Any chance you have the schematic on your computer, just a forward away?
Respectfully,
Dennis Baber
(305) 814-7218
baberdk(at)gmail.com (baberdk(at)gmail.com)
Receive gracefully and share; that's all there is.
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mojavjoe
Joined: 23 Dec 2013 Posts: 64
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Posted: Mon Nov 23, 2015 8:39 am Post subject: Auto Pilot |
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ditto:
From: "Denny Baber" <baberdk(at)gmail.com>
To: "kolb-list" <kolb-list(at)matronics.com>
Sent: Monday, November 23, 2015 10:48:54 AM
Subject: Re: Auto Pilot
Any chance you have the schematic on your computer, just a forward away?
Respectfully,
Dennis Baber
(305) 814-7218
baberdk(at)gmail.com (baberdk(at)gmail.com)
Receive gracefully and share; that's all there is.
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Herbgh(at)nctc.com Guest
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Posted: Mon Nov 23, 2015 11:41 am Post subject: Auto Pilot |
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for me?? Not claiming to be an 'spert on the subject...!
The boards come assembled....and it is a matter of adding power and hooking the serial port up... the serial communication is self clocking..only 2 lines...called I2L as I recall...search that...Yahoo or Google.. Each chip on the 9 or 10 Dof board have a unique address and are monitoring the serial port for their chance to communicate...
I have the parts but have not tried to implement it...would need a battery to run the robust servo's. and a servo driver board...equally cheap...since the auto pilot would only operate on trim tabs...it would be over ridden by the joy stick inputs...and would not do well in very turbulent air...
No one has tried it that I can find...??
Downloading the software(the routines to communicate with the 10dof and gather the info are already written but could need some modification there requiring some knowledge of the C language and ability with an editor/ assembler... tutorials are on the net and almost all computer operating systems come with a C compiler and suitable editor..
a project for sure... I have the parts...but then again I have some other parts that have not been useful at age 72!!
Herb
On 11/23/2015 10:38 AM, mojavjoe(at)comcast.net (mojavjoe(at)comcast.net) wrote:
Quote: | ditto:
From: "Denny Baber" <baberdk(at)gmail.com> (baberdk(at)gmail.com)
To: "kolb-list" <kolb-list(at)matronics.com> (kolb-list(at)matronics.com)
Sent: Monday, November 23, 2015 10:48:54 AM
Subject: Re: Auto Pilot
Any chance you have the schematic on your computer, just a forward away?
Respectfully,
Dennis Baber
(305) 814-7218
[url=mailto:baberdk(at)gmail.com]baberdk(at)gmail.com (baberdk(at)gmail.com)[/url]
Receive gracefully and share; that's all there is.
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t41pilot
Joined: 05 Sep 2011 Posts: 38 Location: Howard City, Michigan
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Posted: Mon Nov 23, 2015 4:39 pm Post subject: Re: Auto Pilot |
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Thought of using an Arduino and heavy duty RC servo to create an electric elevator trim for the firefly but never did it. It would be a simple matter though with no gyro required. A pot or momentary switch could be used as a control in the cockpit somewhere with the servo contained in the elevator hooked to a trim tab. Servo sketches are readily available. The entire Arduino board would not be necessary once your software routine was debugged, just the microprocessor, regulated 5 volt power, and power transistor/FET to source the current needed by the servo.
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_________________ Gregg Kaat
2011 Firefly |
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Herbgh(at)nctc.com Guest
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Posted: Mon Nov 23, 2015 4:52 pm Post subject: Auto Pilot |
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a 555 timer circuit might be the simplest way to go...pot on the panel ,
timer circuit...and three wires to the servo.
Where is Jack Hart when we need him??? Herb
On 11/23/2015 06:39 PM, t41pilot wrote:
Quote: |
Thought of using an Arduino and heavy duty RC servo to create an electric elevator trim for the firefly but never did it. It would be a simple matter though with no gyro required. A pot or momentary switch could be used as a control in the cockpit somewhere with the servo contained in the elevator hooked to a trim tab. Servo sketches are readily available. The entire Arduino board would not be necessary once your software routine was debugged, just the microprocessor, regulated 5 volt power, and power transistor/FET to source the current needed by the servo.
--------
Gregg Kaat
2011 Firefly
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=450070#450070
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t41pilot
Joined: 05 Sep 2011 Posts: 38 Location: Howard City, Michigan
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Herbgh(at)nctc.com Guest
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ceengland7(at)gmail.com Guest
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Posted: Mon Nov 23, 2015 8:22 pm Post subject: Auto Pilot |
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The thread seems to have forked to using a servo as a simple trim tab
controller. On that subject...
The servos have feedback pots (sorry; potentiometers) that can drive an
LED ladder display. They have to have them for feedback to the
controller. For a controller,
http://hobbyking.com/hobbyking/store/__18309__Hobbyking_LED_Servo_Tester.html
https://www.youtube.com/watch?v=wt46maA-MRc
This one has a display, but realistically, the knob should be display
enough.
Charlie
Two quotes:
Simplicate and add lightness
Better is the enemy of good enough
On 11/23/2015 7:07 PM, t41pilot wrote:
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patrickjladd(at)hotmail.c Guest
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Posted: Tue Nov 24, 2015 4:55 am Post subject: Auto Pilot |
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<pots (sorry; potentiometers>
Hi Charlie, that took me back about 70 years.When I was an ack ack gunner we
did an exercise every day called `Aligning pots and selsyns`. This was to
check that the signal from the predictor/radar/tracker did not align the
guns 180 degrees out of sync. (It happened sometimes anyway) I don`t think
that I have heard a reference to `pots` in that sense since those days.
Pat
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ceengland7(at)gmail.com Guest
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Posted: Tue Nov 24, 2015 6:49 am Post subject: Auto Pilot |
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I hope the trip down memory lane doesn't get you shot. :-O
A couple of my lives before retirement (several, now that I think about
it...) were in electronics related fields, and 'pot' was and still is
tech slang for potentiometer. In at least one of the other lives, it was
slang for something else, too, but that's for another day.
What you're describing was likely just a bigger, heavier precursor to
the little r/c servos currently discussed.
Charlie
On 11/24/2015 6:54 AM, Patrick Ladd wrote:
[quote]
<pots (sorry; potentiometers>
Hi Charlie, that took me back about 70 years.When I was an ack ack
gunner we did an exercise every day called `Aligning pots and
selsyns`. This was to check that the signal from the
predictor/radar/tracker did not align the guns 180 degrees out of
sync. (It happened sometimes anyway) I don`t think that I have heard a
reference to `pots` in that sense since those days.
Pat
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