piclist 2001\01\02\065324a >
Thread: Sound Detector
www.piclist.com/techref/io/audio.htm?key=sound
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face BY : Michael Rigby-Jones email (remove spam text)



> -----Original Message-----
> From: James Burkart [SMTP:RemoveMEgrafxjkbspamKILLspamPACBELL.NET]
> Sent: Wednesday, December 27, 2000 8:38 AM
> To:   @spam@PICLISTspamTakeThisOuTMITVMA.MIT.EDU
> Subject:      Re: [OT] Sound Detector
>
>    Well, If you use something like a super-bright blue or white LED the
> spectrum they emit is very narrow, no IR. But I really don't think that
> they
> are bright enough.
>
Surely a white LED, by definition, does not have a narrow specturm?

Mike

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