Open Source Watch Project

Thread: Open Source Watch Project

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  1. #1
    Member fstshrk's Avatar
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    Open Source Watch Project

    I started a thread on the Digital & ABC forum:

    https://forums.watchuseek.com/showthr...18#post1812718

    No reason why this watch could not contain a high end oscillator.

    Any thoughts, chime in on the discussion.
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  2. #2
    Member Eeeb's Avatar
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    Re: Open Source Watch Project

    I have thought a bit about this.

    The least effort path is to take an existent Eta control module (the small board with the microprocessor) and work with the programming.. but I doubt the source is available.

    The next path is to replace the xtal with your own TC xtal... if any watch is fed the correct pulses, no matter what happens after that, it will be HE. It is clever but has a lot less real estate for hardware as you still need a working xtal. Custom chip fab might make it as an 'end plug' ... not cheap in qty 1 but real cheap in qty 1,000,000
    "Forever is composed of nows." - Emily Dickinson

    "The watch has to be surrounded by a history.
    You need more than just a great design. You need to create an atmosphere around the product.
    Who is the company behind it? Why are they using this material?
    People need to be able to identify the watch with themselves. It's based on emotion." - Ralph Furter

    ...that's just my opinion and I've been wrong before and will be again and might be now!

  3. #3
    Member robert11's Avatar
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    Re: Open Source Watch Project

    Quote Originally Posted by Eeeb View Post
    I have thought a bit about this.

    The least effort path is to take an existent Eta control module (the small board with the microprocessor) and work with the programming.. but I doubt the source is available.
    I mean.. Really, how hard can it be.

    Given that RC watches are turning up everywhere I thought maybe rather than fighting it, it might be easier to control the source. If I had a non- portable, but very accurate time source connected to a small radio transmitter broadcasting on the same frequncies as standard time broadcasts then my watch could sync with my clock. Probably easier said than done ..

    or
    http://www.linuxdevices.com/articles/AT9330943155.html
    http://www.linuxdevices.com/news/NS6580187845.html
    Last edited by robert11; April 5th, 2009 at 04:05. Reason: more info

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  5. #4
    Member Eeeb's Avatar
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    Re: Open Source Watch Project

    Quote Originally Posted by robert11 View Post
    I mean.. Really, how hard can it be.
    l
    Reverse engineering ROMs is doable... but a real pain. I could probably borrow the equipment, but who as multiple months to devote to it??

    The Linux watch is a miniature computer... that's easy in some respects.
    "Forever is composed of nows." - Emily Dickinson

    "The watch has to be surrounded by a history.
    You need more than just a great design. You need to create an atmosphere around the product.
    Who is the company behind it? Why are they using this material?
    People need to be able to identify the watch with themselves. It's based on emotion." - Ralph Furter

    ...that's just my opinion and I've been wrong before and will be again and might be now!

  6. #5
    Member fstshrk's Avatar
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    Re: Open Source Watch Project

    Ahh, but with an AB sensor, you also get temp for free and the temp always reads roughly the case temperature, so it's probably a good way to feed compensation into the regulation circuitry without using a TC crystal.

    I am all for Linux but I think for this application, a simple run to completion model would work. Compared to what one does in an RTOS, none of this stuff is time-critical. Monitor sensors once or twice a second, update the display once a second. Any modern microcontroller should be able to do this.

    A friend of mine recommended the TI 430 series microcontrollers with built in LCD controller.

    And there is always one of these:

    http://www.yeswatch.com/wrist-watch/...ech_specs.html
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