Subject:
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Re: Rolling ball clock revisited
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 7 Dec 2004 20:38:44 GMT
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Original-From:
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Matt Lawrence <matt@technoronin.AVOIDSPAMcom>
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Viewed:
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835 times
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On Tue, 7 Dec 2004, David Koudys wrote:
> The problem should have been very simple: each minute, start the elevator until
> a ball is detected by one sensor. Unfortunately, my first try over a several
> hours period showed me that my clock was fast, several seconds each hour! After
> eliminating all mechanical possibilities (two balls at a time, or an undetected
> ball), I concluded that my RCX itself was fast... To make sure, I finally put a
> frequency meter probe on RCX crystal, and indeed it oscillates at 16.03 MHz
> instead of 16.00 MHz. So I finally added some code to wait for 6.92 seconds each
> hour. "
You mean the RCX doesn't speack NTP. How primitive!
-- Matt
Nothing great was ever accomplished without _passion_
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