ISD2560 voice recorder

agentile

Hello,
· 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.· I have built an example application·as 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.· I put an LM386 on the output to boost the signal to the speaker, but this doesn't help.· It seems that the problem is on the microphone end.· I don't have much experience with electret microphones, so I'm not sure how to troubleshoot it.· Anyway, if anyone has any experience with these chips, I could use some advice.

thanks,
Andrew

Chris Savage

Perhaps an example might help?·

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

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Chris Savage
Parallax Tech Support
csavage@parallax.com

agentile

Chris,

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

thanks,

Andrew

Chris Savage

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.· That includes ISD chips in my opinion...·

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Chris Savage
Parallax Tech Support
csavage@parallax.com