Subject:
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re: IR frequency (fwd)
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sun, 30 Mar 1997 05:00:58 GMT
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Original-From:
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MAR ERICSON <mar@cooperANTISPAM.edu>
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Viewed:
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1490 times
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Connect the ground from the oscilloscope to the HB ground (anyone).
Connect the V from the oscilloscope to the + end of the LED driver (or the
annode of the LED if it's connected).
Adjust the oscilloscope until you get a visible square wave sequence. It
may not be exactly square, but it'll do. Measure the period. (time distace
of ONE cycle) [Note: this is a V vs. t depiction]
Divdide this period into 1.
The result is the frequency.
Sorry about the ambiguity in "adjusting" the oscilloscope. I lack some
good technical terms. I must say, I just turn a couple of knobs here and
there. :) Perhaps someone with a better understanding can explain
better.
-----------
ericson mar
Master of Engineering Candidate
Project: Mobile Robotics
mar@cooper.edu
(212)353-4356
Department of Mechanical Engineering
The Cooper Union for the Advancement of Science and Art
-------------------------------------------------------
On Sat, 29 Mar 1997, Sriram Tirunellayi wrote:
> >
> > how do i find out if the IR transmitter (on handy board) is sending
> signals at exactly 38KHz?
> somebody had suggested using an oscilloscope..but how do i go about
> it?
>
>
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