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Thread: reversable motor for monitor?

  1. #81
    FLAC
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    I'd say it's a very good first project. I'ts about a 2-3 out of 10 in terms of complexity. Especially with your mechanical skills.

    Here's a PIC programmer for $8.95 to get you started. You can get it a www.sparkfun.com.

    Go for it!
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    MikeH

  2. #82
    Maximum Bitrate more mods's Avatar
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    Can you give me a shopping list of all the exact items that I need (part numbers)?

    There are all kinds of products on the Basic X site, what do I need? I don't know if I need a developer kit (I think there were three different one's), or if I just need the board (also 3 different).
    It's the cake having/eating thing.

  3. #83
    Constant Bitrate gutterslide's Avatar
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    building on lawrences idea...

    the momentary switch starts the motor turning. as the disk turns, the roller switch keeps continuity until the flat spot on the disk. the display will stop at fully open and fully closed.

    alittle clumsy, but it would work.
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  4. #84
    Maximum Bitrate brrman's Avatar
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    man this thread rocks. I am getting so many ideas.

    Why not use a mini linear actuator?? You can get them with a 2" stroke.
    http://www.motionshop.com/pr/ultrala.shtml
    Car: 2000 Audi A4 Avant 1.8t
    Carputer 2.0: removed. Back to stock.

  5. #85
    Maximum Bitrate more mods's Avatar
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    Quote Originally Posted by MikeH
    I'd say it's a very good first project. I'ts about a 2-3 out of 10 in terms of complexity. Especially with your mechanical skills.

    Here's a PIC programmer for $8.95 to get you started. You can get it a www.sparkfun.com.

    Go for it!
    So, setting up the PIC to do what I want is pretty simple?
    I see there would'nt be much wiring involved, but I have no idea how much code writing is involved.
    It's the cake having/eating thing.

  6. #86
    FLAC
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    Easy. Start with a flow chart. Draw a logic diagram of what you'd like it to do. Start with ign-off/screen-closed/no-switch pressed, the go from there.
    MikeH

  7. #87
    Maximum Bitrate more mods's Avatar
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    Quote Originally Posted by MikeH
    Easy. Start with a flow chart. Draw a logic diagram of what you'd like it to do. Start with ign-off/screen-closed/no-switch pressed, the go from there.
    Can you give me the part numbers for the parts that would be required for such a controller? I just don't know enough about PIC's and PCB's to know how to choose one.
    It's the cake having/eating thing.

  8. #88
    FLAC
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    Start by counting the number of pins (input and ouput) you'll need. You will need to read:
    Ignition (1 input)
    Manual Override rocker switch (2 inputs)
    Limit switches (2 inputs)
    ...anything else?

    You will need to control:
    Motor (open/close) (2 outputs)
    ...anything else?


    So far this sounds like 7-8 I/O pins. Take a look at the PIC family tree at MicroChip and find a small, simple FLASH PIC that has 8 I/O pins (they almost all do), then look at DigiKey and see how much it costs.

    You might consider the 16F628....it's way overkill for what you are doing, but it's relatively cheap and has lot's of bells and whistles. Or the ITPS uses the 12F629. It's only got 6 I/O pins though, but several people on the boards are programming it.

    Sketch out a diagram. You'll need to convert the CMOS outputs of the PIC to something that will drive to motor you choose. Maybe Ricky or Paul can give you some guidance in motor control interfaces. But it's probably just a simple NPN transistor with a couple of resistors.

    I think this would be a great project for you....go for it!
    MikeH

  9. #89
    Maximum Bitrate more mods's Avatar
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    maybe it should work like this:
    ign. on = monitor would open all the way.
    after the monitor was open all the way the rocker would allow adjustment.
    ign. off = no change
    door open = close Monitor regardless of where it is (full open, half open)

    Now, would it be a problem to have the door open to close monitor, my door jamb switch just grounds when the door is open the the ground is broken when the door is closed. I would not want to stand there with the door open till the monitor finished closing. Could this controller also be used to control my opus (I mean the ign. lead)?

    then it would work like this:
    ign. on = monitor would open all the way and turn on pc.
    after the monitor was open all the way the rocker would allow adjustment.
    ign. off = no change
    door open = close Monitor regardless of where it is (full open, half open) and turn off pc.


    Edit:
    Just thinking out loud
    Actually a door function like this would be good to dissable the car.
    something like this
    Door open = PC on with a time limit to enter a pin# before disabling the car.
    ign. on = monitor would open all the way.
    after the monitor was open all the way the rocker would allow adjustment.
    ign. off = no change
    door open = close Monitor regardless of where it is (full open, half open) and turn off pc.

    This would require the pc to output something to the controler, then the controller would then trip a relay or something. And someone would have to write the software.
    It's the cake having/eating thing.

  10. #90
    FLAC
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    Whoah! Now you're starting to see the power and flexibility of these little processors! Yes, all of that would work. If you want to get fancy, you could do what a couple of my customers are doing. Put a +12V toggle input on the processor that would allow you to remotely start this thing from your car alarm remote..... The possiblities are endless..
    MikeH

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