Subject:
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Re: 41Khz not 38KHz
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 12 Feb 2000 03:55:51 GMT
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Original-From:
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Donald Day <ddigor@well.com%saynotospam%>
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Viewed:
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651 times
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The 3.81K resistor is probably more accurate than its
rated 1%, but the capacitor may be much less precise,
unless you got a tight tolerance metal film one,
(as I think the part list specifies).
Precision also relies on the thresholds of the Schmitt trigger
CMOS gate. These may usually be very tight, but they aren't guaranteed.
Easiest cheap thing to do is to increase the R value based on your
measurements.
The closest 1% value to 41/38 * 3.81K is 4.12K
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Message is in Reply To:
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| Maybe somebody could help. I am try to use the IR output. the problem is that the HB is modulating the signal at 41kHz and I need to get it down to 38kHz. I have checked the resistor and capacitor used in generating the frequency. R = 3.81 K C = (...) (25 years ago, 12-Feb-00, to lugnet.robotics.handyboard)
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