PR15- Why the resistor value is 47K

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PR15- Why the resistor value is 47K

Postby zamlak » Sat Apr 17, 2010 12:53 pm

I would like to know, why in PR15 choose R= 47K ohm. Please help me :ugeek:
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Re: PR15- Why the resistor value is 47K

Postby hyng » Sat Apr 17, 2010 1:34 pm

From the gas sensor datasheet, Rs is approximately from 10K to 90K. In order to get the significant output voltage value that always change, the center value is taken which is around 47K. You can use any other value of resistor too. Please note that the output show at the LCD is just the ADC value of the output voltage.
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Re: PR15- Why the resistor value is 47K

Postby zamlak » Tue Apr 20, 2010 11:21 am

Thanks
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