Help with PH Sensor Arduino

RsPhotoHut · 04/04/2013, 01:08 PM

Hey guys,
I'm in the process of building a reef controller,
I have most of the things working already, temp, lights (with dimming), timers, relays and sockets, screen and keypad with a full user interface.

So I just tried to hook up a PH sensor i found here and built (Terahz's shield)
But I can't get to understand how to connect it correctly,
I get a changing (in waves) reading when connecting it.

So, if anyone know how to hook it up to an arduino, or have any idea or documents of a working shield that would be awsome!

Thanks!

der_wille_zur_macht · 04/05/2013, 06:00 AM

Connect GND to either of the GND pins on the header, and +12v to the V+ pin. Make sure the GND is common with your Arduino. Connect the VPH pin from the header to an analog pin on your Arduino. It should report a voltage.

Can you describe a bit more what you mean by "changing in waves?" Do you have a working pH meter to test your probe on?

04/04/2013, 01:08 PM	#1
RsPhotoHut Registered Member Join Date: Mar 2012 Location: Haifa, Israel Posts: 6	Help with PH Sensor Arduino Hey guys, I'm in the process of building a reef controller, I have most of the things working already, temp, lights (with dimming), timers, relays and sockets, screen and keypad with a full user interface. So I just tried to hook up a PH sensor i found here and built (Terahz's shield) But I can't get to understand how to connect it correctly, I get a changing (in waves) reading when connecting it. So, if anyone know how to hook it up to an arduino, or have any idea or documents of a working shield that would be awsome! Thanks!

04/05/2013, 06:00 AM	#2
der_wille_zur_macht Team RC Member Join Date: Sep 2003 Location: NY Posts: 17,749	Connect GND to either of the GND pins on the header, and +12v to the V+ pin. Make sure the GND is common with your Arduino. Connect the VPH pin from the header to an analog pin on your Arduino. It should report a voltage. Can you describe a bit more what you mean by "changing in waves?" Do you have a working pH meter to test your probe on? __________________ Inconveniencing marine life since 1992 "It is my personal belief that reef aquaria should be thriving communities of biodiversity, representative of their wild counterparts, and not merely collections of pretty specimens growing on tidy clean rock shelves covered in purple coralline algae." (Eric Borneman)