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agentile
01-13-2006, 09:06 AM
Hello,
ˇ I am working on a project which uses an ISD2560 voice recording chip, and I was hoping that someone out there has some experience with this.ˇ I have built an example applicationˇas shown in the datasheet, and when I record something, it does work, but the volume is so low that I have to scream into the microphone.ˇ I put an LM386 on the output to boost the signal to the speaker, but this doesn't help.ˇ It seems that the problem is on the microphone end.ˇ I don't have much experience with electret microphones, so I'm not sure how to troubleshoot it.ˇ Anyway, if anyone has any experience with these chips, I could use some advice.

thanks,
Andrew
Chris Savage
01-13-2006, 09:33 AM
Perhaps an example might help?ˇ =)

http://www.parallax.com/dl/docs/prod/schem/SoundAppModSchem.pdf

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Chris Savage
Parallax Tech Support
csavage@parallax.com (mailto:csavage@parallax.com)
agentile
01-13-2006, 11:53 AM
Chris,

ˇˇˇˇ Once again, you have been a great help to me.ˇ This is exactly what I needed.

thanks,

Andrew
Chris Savage
01-13-2006, 10:03 PM
I totally understand wanting to "do-it-yourself", but I also try to refer to existing schematics or code when taking on anything fairly complex.ˇ That includes ISD chips in my opinion...ˇ =)

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Chris Savage
Parallax Tech Support
csavage@parallax.com (mailto:csavage@parallax.com)