To LUGNET HomepageTo LUGNET News HomepageTo LUGNET Guide Homepage
 Help on Searching
 
Post new message to lugnet.faqOpen lugnet.faq in your NNTP NewsreaderTo LUGNET News Traffic PageSign In (Members)
 FAQ / 536
535  |  537
Subject: 
[MindStorms FAQ 4.5 How do I make a sound sensor?]
Newsgroups: 
lugnet.faq
Date: 
Tue, 13 Jul 1999 21:31:21 GMT
Viewed: 
2201 times
  
Subject:          4.5 How do I make a sound sensor?
Content-Language: en
Topic-Level:      0
Revision:         Robert Munafo, 1999-07-13
Location:         /robotics/rcx/
Comment:          Topic-level is inaccurate pending a reference for topic
levels

<p>Passive microphones (the kind that don't use an internal battery) are
essentially sound-dependent resistors and most have a resistance range
that lends well to being used as an RCX input (actually this isn't
quite true -- a microphone is a resistive load in series with a small
current source, but when you put 9 volts across the microphone you can
ignore the small current source). The microphone would be attached and
wired to a LEGO&reg; conducting plate in a way similar to the light and
temperature sensors discussed elsewhere here. Since you probably want
it to be small you should use the "mini condensor" type mic. A
cardioid (directional) mic is probably more useful because it allows
you to determine direction just by rotating. </p>



Message has 2 Replies:
  Re: [MindStorms FAQ 4.5 How do I make a sound sensor?]
 
(...) Hot dang! Wow! Thanks for the new material! :-, Cheers, - jsproat (25 years ago, 13-Jul-99, to lugnet.faq)
  [MindStorms FAQ 4.5 How do I make a sound sensor?]
 
Subject: 4.5 How do I make a sound sensor? Content-Language: en Topic-Level: 0 Revision: Robert Munafo, 1999-07-14 Location: /robotics/rcx/ Comment: Topic-level is inaccurate pending a reference for topic levels <p>A rather complex circuit is (...) (25 years ago, 14-Jul-99, to lugnet.faq)

4 Messages in This Thread:


Entire Thread on One Page:
Nested:  All | Brief | Compact | Dots
Linear:  All | Brief | Compact
    

Custom Search

©2005 LUGNET. All rights reserved. - hosted by steinbruch.info GbR