Reflow picka ? aneb cim merit teplotu

[Naprstek, Jiri]

Pekne povidani je tady: http://en.wikipedia.org/wiki/Thermocouple

Toho MAXe asi nemusite nutne pouzit, ale v zasade budete muset udelat prakticky to same, co on, to znamena zesilit signal z te sondy (docela dost), trochu prefiltrovat, zmerit si teplotu okoli a pricist ji k tomu termoclanku (jak najdete na te wikistrance, termoclanek vlastne "meri" rozdil teplot mezi svymi konci).

Pokud ten MAX nestoji balik, mozna to bude jednodussi a overene reseni, nez si to bastlit sam, zvlast kdyz potrebujete vicemene jeden kus.

Zdravi,

JN

> -----Original Message-----
> From: hw-list-bounces@list.hw.cz [mailto:hw-list-bounces@list.hw.cz]On
> Behalf Of Luboš Rückl
> Sent: Thursday, November 30, 2006 2:31 PM
> To: HW-news
> Subject: Re: Re: Reflow picka ? aneb cim merit teplotu
> 
> 
> Dobry den.
> Dekuji za velmi uzitecne nasmerovani, uz jsem si to trochu 
> prostudoval.
> Jako inspirace a potvrzeni o realnosti zameru je ten Elektor 
> velmi dobry.
> Asi se do toho prece jenom pustim, ale bude to na delsi dobu.
> 
> Uz jsem se dival po termoclancich typu K a u tech rychlych
> je cena min. 354,60 Kc (je to sice mene nez cela "picka", ale kdyz
> pripoctu postovne, uz to bude vice) a to jeste nepocitam konektor
> pro pripojeni cidla. Nemel jsem tuseni, ze je to tak drahe.
> 
> Take jsem nasel mnoho zajimavych cidel na strance FK technics
> http://soucastky.conrad.cz/aktivni-soucastky+c2128/teplotni-se
> nzory+c2134/?PgID=2&sCatID=2134
> mnoho zajimavych teplotnich sensoru (trochu levnejsich), ale 
> tam mi zase 
> schazi
> udaj o rychlosti. Take nevim, jak cidlo pripojit, pajenim by to asi 
> neslo :-) .
> 
> Jeste nevim, nakolik je potrebne pouzit pro zpracovani signalu z cidla
> ten MAX6675. Lze pouzit AD prevodnik v MCU (domnivam se, ze rozliseni
> 10 bitu by mi bohate stacilo)?
> Asi si take budu muset nastudovat, co je kompenzace teploty 
> studeneho konce.
> Nikdy jsem o tom dosud neslysel...
> Nikde nemohu najit charakteristiku termoclanku typu K. Urcite 
> mi nekdo 
> poradite,
> zda je linearni, ci je treba pouzit nejaky jednoduchy vypocet anebo 
> tabulku ?
> Nevite o nejakych strankach, kde by to bylo dobre vysvetleno ?
> 
> --
> Lubos Ruckl
> 
> 
> 
> Richard Kaliciak napsal(a):
> > Dobry den,
> >
> > pozrite si Elektor 01/2006, tam bola uverejnena prestavba 
> piecky na SMD
> > piecku.
> >
> >   
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> 
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