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nodo-domotica.nl • Toon onderwerp - 0-10V meten van co2 sensor - Afdrukweergave
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0-10V meten van co2 sensor
http://www.nodo-domotica.nl/forum/viewtopic.php?f=35&t=1890		 Pagina 1 van 1
Auteur:  Flippo765 [ 04 jan 2014, 21:27 ]
Titel:  0-10V meten van co2 sensor
Hallo

Ik heb een co2 sensor aangeschaft en deze geeft een 0-10V signaal uit die ik met de Nodo wil lezen.
Hier wil ik daarna de afzuigventilatie op gaan sturen (harder bij meer vervuiling)
Deze sensor heb ik:

Heeft iemand een idee hoe ik dit signaal (volgens mij moet halveren) op de Nodo kan uitlezen?
Auteur:  mvdbro [ 04 jan 2014, 21:46 ]
Titel:  Re: 0-10V meten van co2 sensor
Auteur:  Flippo765 [ 05 jan 2014, 12:44 ]
Titel:  Re: 0-10V meten van co2 sensor
Muchos gracias, ga het van de week even op een broodplank proberen.

Wanneer ik het commando wiredpullup,off geef gaat de waarde schommelen tussen de 0 en 1024, ongeacht of er een sensor is aangesloten.

Ik heb het vermoeden dat nu het verschil tussen voedingsspanningen gemeten word, hierdoor zal hij blijven schommelen.
De Co2 sensor geeft een 0-10V signaal af een heeft een aparte 24V voeding.

Waarde op de sensor is stabiel 800 dus de spanning zou rond de 2,3V uit moeten komen.

Als ik de GND doorverbind met de sensor dan werkt het wel.
Is hier alleen niet een kans dat de nulstromen onwijs kunnen oplopen en er schade aan de Nodo kan ontstaan?
Auteur:  Flippo765 [ 22 jan 2014, 23:30 ]
Titel:  Re: 0-10V meten van co2 sensor
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