[OpenTRV-dev] V0.2-Arduino

[Damon Hart-Davis]

Hi,

On 21 Apr 2013, at 23:40, Kevin Wood wrote:

> Hi Damon,
> 
> Good work.
> 
> By the way, I have the capability to measure average current over long periods as we have a product which does this for mobile phones. Might be especially useful where you have very low idle consumption with occasional high peaks.

Can I borrow/buy such a beast?

Note that I'm at the bottom of my cheap meter's abilities 1uA/0.1mV for the idle draw.

> 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.)

Anyhow, I have to get a round tuit over the next week on way or another...

Rgds

Damon


> 
> Best Regards
> 
> Kevin
> 
> On 21/04/13 19:22, Damon Hart-Davis wrote:
>> FYI, I'm plodding along with this work:
>> 
>> https://sourceforge.net/p/opentrv/code-0/HEAD/tree/trunk/Arduino/V0p2_Main/
>> 
>> and running a simple software RTC (HH:MM:SS local time; no dates as of yet) and skeleton UI, current consumption is at the limit of my ability to measure (~1uA, 1 micro amp) without the LED flashing and when running off 2xAA NiMH.
>> 
>> This is essentially a rehash of the PICAXE V0.09/V0.1 work.
>> 
>> I may finally get to play with the new TMP102 temp sensor (the real board would have a TMP112 for better accuracy) tomorrow.
>> 
>> Also, for giggles, I have bought a tiny microphone (ADMP401) with a view to prototyping occupancy detection by detection of voice frequencies (using one of the FFT libraries for the AVR).
>