Loud Noise at 20khz

Closed Thread
Results 1 to 7 of 7

Hybrid View

  1. - 13th July 2009, 19:36 #1
    koossa's Avatar
    koossa
    koossa is offline Member
    Join Date
    Dec 2004
    Posts
    262

    Did you find this post helpful? Yes | No

    Default

    Thank you very much aratti!!
  2. - 13th July 2009, 20:06 #2
    falingtrea's Avatar
    falingtrea
    falingtrea is offline Member
    Join Date
    Feb 2008
    Posts
    134

    Did you find this post helpful? Yes | No

    Default

    If you want to put out a lot of db at 20khZ you should look into a piezo tweeter to connect to the amp.
    Tim Barr
  3. - 13th July 2009, 20:18 #3
    koossa's Avatar
    koossa
    koossa is offline Member
    Join Date
    Dec 2004
    Posts
    262

    Did you find this post helpful? Yes | No

    Default

    Thank you falingtrea.

    Just a thought.
    Will I be able to run a piezo tweeter directly from a pic using the sound command (without any amplifier)?
    Or will the sound not be very loud?
  4. - 13th July 2009, 21:16 #4
    Archangel's Avatar
    Archangel
    Archangel is offline SuperMod
    Join Date
    Aug 2006
    Location
    Look, behind you.
    Posts
    2,818

    Did you find this post helpful? Yes | No

    Default

    Hi koossa,
    IMHO a 555 timer is more appropriate for this project, it's analog output will better drive the amplifier than the PICs choppy output. Price ? About the same, you could use a 556 dual 555 and vary the tone with the second timer, Oh, and have more hair left at day's end too.
    If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
    .
    Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
    .
    There simply is no "Happy Spam" If you do it you will disappear from this forum.
  5. - 14th July 2009, 10:24 #5
    Ioannis's Avatar
    Ioannis
    Ioannis is offline SuperMod
    Join Date
    Nov 2003
    Location
    Greece
    Posts
    4,171

    Did you find this post helpful? Yes | No

    Default

    Also a 555 can drive load from 12 volts while PIC from only 5.

    Ioannis
    www.signalcom.gr
« Previous Thread | Next Thread »

Similar Threads

  1. Pretty Sure a Noise Problem
    By Tobias in forum General
    Replies: 3
    Last Post: - 10th December 2009, 01:46
  2. Noise on PORTC.0 with PIC16F73
    By passion1 in forum mel PIC BASIC Pro
    Replies: 7
    Last Post: - 15th February 2009, 21:47
  3. Need suggestions for noise suppression
    By paul.barsamian in forum General
    Replies: 2
    Last Post: - 29th March 2008, 15:37
  4. PIC to PIC noise problem
    By skerrin in forum mel PIC BASIC Pro
    Replies: 1
    Last Post: - 9th September 2005, 05:02
  5. (Off Topic) Noise from battery supply
    By CLARE in forum mel PIC BASIC Pro
    Replies: 1
    Last Post: - 22nd August 2004, 11:01

Members who have read this thread : 0

You do not have permission to view the list of names.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts

Forum Rules