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Digital voice recorder 3secs record and playback!

 
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kel



Joined: 17 Oct 2005
Posts: 68
Location: Brisbane

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Digital voice recorder 3secs record and playback!
PostPosted: Tue Apr 04, 2006 8:10 pm     Reply with quote
Guys I need your help.I'm working on my school project which is on building a digital voice recorder.It's suppose to record when a button B0 is pressed,playback when button B1 is pressed and reset when button B3 is pressed.I've got the microphone,amplifier,4th order low pass shebyshev filter working on the breadboard.
The cutoff frequency is 3.3khz which means a sampling frequency of 6.6kzh or 8khz and pic16f877a internal 10bits adc are sufficient.

I believe someone in this forum has already built one.Can anyone post some information on this including some coding...
I will appreciate your helps.
Cheers.. Very Happy
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Tue Apr 04, 2006 8:42 pm     Reply with quote
Quote:
I'm working on my school project which is on building a digital voice recorder.

Normally this is done with an "ISD" chip. Look at the CCS driver
file, ISD4003.C, and look at the example file, EX_VOICE.C to see
how to call the functions. Search the board for "debounce" to find
functions to debounce your push-button switches.

The files are in these folders:

c:\Program Files\PICC\Drivers

c:\Program Files\PICC\Examples
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