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 Robotics / Handy Board / 7954
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Subject: 
Re: IR (formally 6.8nF cap)
Newsgroups: 
lugnet.robotics.handyboard
Date: 
Fri, 14 Jul 2000 07:39:59 GMT
Original-From: 
John Hatton <john.hatton@STOPSPAMuk.airsysatm.thomson-csf.com>
Viewed: 
876 times
  
So as the 39KHz value would be ok for either the IS1U60 (38KHz) or the
hacked sensors (40KHz), will my idea for the hacked IR sensor distance
measurement using the IR output circuitry to drive multiple LEDs also be
valid ?.

Thanks for the help.

John Hatton.


Fred G. Martin wrote:

there's not really a big diff in the performance of the ir sensors
given 38 or 40 khz.  so either is fine, +/- a few khz just doesn't
really matter, you have to detune 10 khz or so for it to matter.




Message has 1 Reply:
  Re: IR (formally 6.8nF cap)
 
yes, a variance of 1 kHz in the carrier frequency makes no difference at all to these sensors. f. In your message you said: (...) (24 years ago, 14-Jul-00, to lugnet.robotics.handyboard)

Message is in Reply To:
  Re: IR (formally 6.8nF cap)
 
there's not really a big diff in the performance of the ir sensors given 38 or 40 khz. so either is fine, +/- a few khz just doesn't really matter, you have to detune 10 khz or so for it to matter. there is an issue whereby there are two different (...) (24 years ago, 13-Jul-00, to lugnet.robotics.handyboard)

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