+ Reply to Thread
Results 1 to 11 of 11

Thread: voice recording

  1. #1
    timothyjackson Newbie
    Join Date
    Sep 2004
    Posts
    148

    Default voice recording

    any body know of a circuit diagram floating around..for....making a voice recording circuit..say.. around 20 seconds of record?.........

    timbo


  2. #2
    JohnBrown Newbie
    Join Date
    Apr 2004
    Location
    Surrey, England
    Posts
    141

    Default

    Google for ISD

  3. #3
    Sebi Newbie
    Join Date
    Jan 2003
    Location
    Hungary
    Posts
    1,717

    Default

    You need an ISD chip. The International Storage Devices today Winbond.
    Attached Files

  4. #4
    John Sorensen Newbie
    Join Date
    May 2003
    Location
    Montana, USA
    Posts
    320

    Default

    Radio shack used to have a "kit" (toy) recorder. You may even check for a consumer electronic thing (I'm thinking like talking picture frames) that could be cheaper than starting from scratch. Unless you're doing it for fun.

    j.

  5. #5
    timothyjackson Newbie
    Join Date
    Sep 2004
    Posts
    148

    Default

    thanks guys....

    anybody know of any actual circuit diagrams which include the isd's?

  6. #6
    Sebi Newbie
    Join Date
    Jan 2003
    Location
    Hungary
    Posts
    1,717

    Default

    See the attached datasheet page 2-16...

  7. #7
    Super Moderator kinjalgp Newbie
    Join Date
    Oct 2002
    Location
    INDIA/USA
    Posts
    1,855

    Default

    APR9600 is also a nice chip for voice recording. It offers maximum of 60 second recording time.
    http://www.allproducts.com.tw/ee/apl...recording.html
    "There is no way to peace, peace is the way!"

  8. #8
    DigiTan Okay
    Join Date
    Apr 2004
    Location
    Dallas. USA
    Posts
    752

    Default

    I've had some luck with ISD's "ISD2590E" 90-second recorder. They retail around 10 U.S.D. 'Very straightforward design.

  9. #9
    uncle matt Newbie
    Join Date
    Nov 2004
    Posts
    2

    Default ISD1100 series

    greetings,
    Gonna get an ISD1100 series working. Has anybody ever played with one of these? Any helpful hints from the kitchen? The PDF says that the 16 ohm speaker will output 12.2 mW. How loud is that? any audio buffs out there that can give a comparison. Am I gonna have to use an audio amplifier to get a decent output.

    thanks... 8)

  10. #10
    DigiTan Okay
    Join Date
    Apr 2004
    Location
    Dallas. USA
    Posts
    752

    Default

    The sound from my 90-second version was about what you'd get from a typical mini-tape recorder. I forgot what that is in decibel terms, but it was softer than normal speech. Other factors like the automatic gain control will contribute, but if you're looking for a fuller sound, you will have to amplify.
    The most-hated young engineer in America.
    * AVR Projects
    * Robot War: TI
    * About

  11. #11
    uncle matt Newbie
    Join Date
    Nov 2004
    Posts
    2

    Default cool

    cool, thanks..... 8)

+ Reply to Thread

Tags for this Thread