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  1. #1
    Our new friend needs to reach 10 posts to get to the next flight level
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    Starting. Instruments testing. VSI and Altimeter. Lancair proyect.

    I have 8 instruments. They were in a ast-300 simulator. Y tried to get the whole cokcpit, but finally only could get the instruments:
    -Airspeed
    -Artificial Horizon
    -Altimeter
    -Turn coordinator
    -HSI
    -VSI
    -Vor with GS
    -RMI


    My first idea is to make a Lancair (like prepar3d realair) cockpit.
    But instruments scales is perfect for cessna 172 or piper cherokee. So I must think about it.

    Im trying to interface them with prepar3d. Some of them are easy (d'Arsonvals.. pots..). Im using Arduino Mega, link2fs, fsuipc..
    Im new in all this stuff and it takes time and work.

    Here it is a vid testing VSI and Altimeter.
    VSI is only a d'Arsonval.
    Altimeter has a DC motor to move the gauges. Needle position is read with a precision ten turn potentiometer. Kollsman is read with another pot.



    Altimeter works well. But only reads 10.000 ft bacause the reading is made with a 10 turn pot.
    10.000 is not enough. Is it?
    So Im thinking in put some gears to convert it to 20.000ft. And perhaps a crosshatch flag..?!


    The most difficult one is going to be the HSI. It is a real one bendix king HSI.
    Im having problems with some synchro resolvers. Im looking for info but it seems to be difficult to operate them.
    I think Im going to change them for absolute encoders. Could you recommend me a good and cheap absolute encoder?

    Thanks!

  2. #2
    Our new friend needs to reach 10 posts to get to the next flight level
    Join Date
    Jul 2016
    Location
    Madrid
    Posts
    8
    Contribute If you enjoy reading the
    content here, click the below
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    Re: Starting. Instruments testing. VSI and Altimeter. Lancair proyect.

    Today I am working with ADF-RMI.




    Each needle (adf and vor) is moved with an air core.
    Im testing ADF needle. I use a motor driver with two exits. You need two motor exits to move each needle.
    Playing with sin() and cos() of the angle. The angle is read with link2fs, offset 0C6A FSUIPC in expert mode.

    The other needle is going to be easy now.

    The compass card (not working for now) is moved with a DC motor. And reading the position with a synchro resolver. I think I must change the resolver for an absolute encoder... more work..

  3. #3
    Our new friend needs to reach 10 posts to get to the next flight level
    Join Date
    Jul 2016
    Location
    Madrid
    Posts
    8
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
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    Re: Starting. Instruments testing. VSI and Altimeter. Lancair proyect.

    One more....
    VOR test in an ILS approach.



    Needles and flags working.
    OBS knob not working yet. Ir has a 400hz synchro resolver. I dont know how to read it with arduino. I have try but only manage to read 90º for each stator.
    Im thinking in purchase an absolute encoder.
    I have find this one:

    http://www.usdigital.com/products/en...tary/shaft/MA3

    http://www.rls.si/products/rotary-ma...rotary-encoder

    http://www.rls.si/products/rotary-ma...agnetic-module

    ¿is there a way to read resolvers with arduino?
    What absolute encoder do you recomend to use it with arduino. The easy way is something to return analogue voltage 0-5v in 0º to 360º..

    Thanks.