ph meter using pic 16f877

[sinorbee]

Re: ph meter using pic 16f877 pls help on coding

I can't understand when will Motor B start pumping out water? When ph > 7 or less than 7?

the motor B will start pump out in both condition(ph>7&ph<7) so only ph 7 stays.
Do i need a reset button to repeat the process.

 

[jayanth.devarayanadurga]

Re: ph meter using pic 16f877 pls help on coding

repeat what? The circuit will run continuously. There is no need to reset. Change the sensor connection such that water level low and water level high will give logic 1.

Try this simulation. Extract files to Desktop\CCS C Project\pH_meter

 

[jpsganesh]

Re: ph meter using pic 16f877 pls help on coding

sinorbee,

Exactly u can't set the Ph value as 7. Practically u may not be able to read it.
Set some values grater that or lesser than or b/w two values like 6.9 && 7.1

 

[a3h]

Re: ph meter using pic 16f877 pls help on coding

plz can you explain how op amplifier react with ph electrode in negative mv(basic solution)
sorry, my english is bad

 

[toitainang]

Re: ph meter using pic 16f877 pls help on coding

in file main.c

why y = 74.24057142857143 ?
I don't understand ...

 

[Gery Rheynhard Manurung]

Re: ph meter using pic 16f877 pls help on coding

hi sinorbee, i'm gery. I have task to make a pH meter. Can i get your schematic and the coding for CodeVisionCompiler ? cause i dont know how to connecting the probe to the microcontroller. i use pH electrode Lutron PE3. Please help me. Thanks :grin:

 

[embpic]

Re: ph meter using pic 16f877 pls help on coding

ok sorry for interrupt
i read the what is ph meter do.and read thread also.
but how to read ph of water means what is main concept of this ?

 

[Hachicko Chan]

Re: ph meter using pic 16f877 pls help on coding

Good day. . i am making PH sensorr for my projct, i already have the circuit but i dont have the code. .could anyone help me? thanks a lot

 

[jayanth.devarayanadurga]

Re: ph meter using pic 16f877 pls help on coding

Post your circuit and datasheet of pH sensor you are using. If possible mention the vout range of your pH sensor.