Re: Measuring breathing patterns

Awesome stuff, Mark, thx!!!

I ordered these:

http://www1.uk.conrad.com/scripts/wgate/zcop_uk/~flNlc3Npb249UDkwX0NPUF9VSzpDX0FHQVRFMDg6MDAwMC4wMTIyLmY4NzBlMzc2Jn5odHRwX2NvbnRlbnRfY2hhcnNldD1pc28tODg1OS0xJn5TdGF0ZT0zOTQyMTMwNjU3====?~template=PCAT_AREA_S_BROWSE&p_selected_area=%24ROOT&perform_special_action=&glb_user_js=Y&shop=UK&product_show_id=&p_page_to_display=DirektSearch&~cookies=1&zhmmh_lfo=&zhmmh_area_kz=14&s_haupt_kategorie=&p_searchstring=ntc833&r3_matn=&insert_kz=&area_s_url=&area_url=&direkt_aufriss_area=&p_countdown=&p_80=&p_80_category=&p_80_article=&p_next_template_after_login=&mindestbestellwert=&login=&password=&bpemail=&bpid=&url=&show_wk=&use_search=1&p_back_template=pcat_suchergebnis_header&template=&kna_news=&p_status_scenario=&documentselector=&p_load_area=$ROOT&p_artikelbilder_mode=&p_sortopt=&page=&p_catalog_max_results=10

hopefully they will do the trick!



On Mon, 02 Jan 2006 17:52:35 -0500, Mark wrote:

> A tiny bead thermistor works fine for this putpose - Use a resistor and the
> thermistor as a voltage divider feeding an adc from the center and using the
> driving voltage to the divider as the reference voltage to make it
> ratiometric. Then devise an algorithm to detect the increase in temperature
> as you exhale.
>
> You don't need precision because you don't care what the actual temperature
> is, only the change. I use this technique in a product I sell to monitor
> respiration in anesthetized animals and using 10 bits I can very reliably
> detect breaths in animals ranging from tiny kittens to 250 pound St.
> Bernards.
>
> Mark
>
>
>
> "damn" <damn_no__spam@xxxxxxxxxx> wrote in message
> news:pan.2006.01.02.16.09.03.51944@xxxxxxxxxxxxx
>> Hi all,
>>
>> I suffer from somewhat bad sleep, most likely because of an allergy.
>> I very much would like to monitor my breathing at night to get a relation
>> in between bad sleep and breathing problems.
>>
>> I was thinking of doing this by measuring the temperature of the air
>> getting out of mounth and/or nose.
>>
>> This requires a fast and accurate temperature sensor. The output of this
>> sensor will be connected to a A/D board connected to my PC.
>>
>>
>> Does anyone have any hints on what temperature sensor to use?
>>
>>
>> Thank you!
>>
>>
>>
>> B.

.

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