[OpenTRV-dev] V0.2-Arduino

[Damon Hart-Davis]

Hi,

Yes, thanks for that.  I may ask for more help when I get closer!

Rgds

Damon


On 22 Apr 2013, at 10:18, Mike Stirling wrote:

> 
> 
> ----------------original message-----------------
> From: "Damon Hart-Davis" EMAIL ADDRESS HIDDEN 
> To: "Closed list for developer discussions" EMAIL ADDRESS HIDDEN 
> Date: Mon, 22 Apr 2013 07:58:47 +0100
> -------------------------------------------------
> 
> 
>> 
>>> Occupation detection by sound is an interesting idea. Do you even need to go as 
>>> far as an FFT?
>> 
>> Don't know, but it might be better than filling the board with passives. (Many 
>> many moons ago I made some primitive sound interaction stuff for toys before the 
>> possibility of DSP.)
> 
> If you are just considering peak detection in the voice band then this might be best implemented on an AVR using one or more IIR filters. This would be a software equivalent to a board full of passives (which you can't avoid by the way; you will always need at least an anti-aliasing filter).
> 
> Mike
> 
> -- 
> 
> 
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