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nodo-domotica.nl • Toon onderwerp - Een ntc uitlezen - Afdrukweergave
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Een ntc uitlezen
http://www.nodo-domotica.nl/forum/viewtopic.php?f=26&t=962		 Pagina 1 van 2  Volgende »
Auteur:  frankythys [ 17 nov 2012, 10:02 ]
Titel:  Een ntc uitlezen
Hallo,

Heeft er iemand ervaring met het uitlezen van een ntc temp sensor met de nodo ?
Auteur:  manjh [ 17 nov 2012, 11:18 ]
Titel:  Re: Een ntc uitlezen
Lm35 of lm335, analoge sensoren, zijn goed bruikbaar. Je moet ze wel even ijken met een lage en hoge temperatuur. Bakje ijs, en bakje heet water. Zie beschrijving op de wiki.

Zelf gebruik ik een dht11 (digitale temp en vochtigheids sensor), maar de resolutie valt nogal tegen.
Veel beter is een Dallas sensor, zoals de ds18b20. Kost heel weinig, en is rechtstreeks aan te sluiten op een digitale poort. Je kunt bovendien meerdere sensoren aansluiten op dezelfde poort, omdat elke sensor een uniek eigen adres heeft dat je gebruikt bij het uitlezen.
Je hebt wel een plugin nodig voor de nodo, maar die heb ik. Volgende week beschikbaar in Google code.
Je kunt ook de weerstation sensor van Martinus gebruiken.
Auteur:  frankythys [ 17 nov 2012, 19:42 ]
Titel:  Re: Een ntc uitlezen
Bedankt voor de info wacht ik wel op de plugin . :P
Auteur:  mvdbro [ 18 nov 2012, 10:23 ]
Titel:  Re: Een ntc uitlezen
Ik zou de NTC gewoon even aansluiten op een analoge poort van de Nodo. Het is gewoon een variabele weerstand, dus niet zo ingewikkeld. Alleen calibreren moet je even uitzoeken.
Auteur:  frankythys [ 18 nov 2012, 16:39 ]
Titel:  Re: Een ntc uitlezen
Ik heb de ntc aangeloten op de arduino mega nodo en krijg data via de wepapp maar die moet naar celcius omgezet worden via steinhart-hart thermistor equation en dat is een probleem .
Auteur:  mvdbro [ 18 nov 2012, 16:46 ]
Titel:  Re: Een ntc uitlezen
Tja daar had ik nog niet aan gedacht, misschien is een LM335 dan toch handiger...
Auteur:  Paul [ 18 nov 2012, 21:04 ]
Titel:  Re: Een ntc uitlezen
Wellicht heb je hier iets aan:
Auteur:  manjh [ 19 nov 2012, 14:40 ]
Titel:  Re: Een ntc uitlezen
Auteur:  mvdbro [ 19 nov 2012, 18:55 ]
Titel:  Re: Een ntc uitlezen
Auteur:  manjh [ 19 nov 2012, 19:19 ]
Titel:  Re: Een ntc uitlezen
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