please help me in my project pic16f877a

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modi_81

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Myproject is carbon monoxide detector control by pic16f877a which connect the pic with the following elements:
1- co sensor(like potinometers)
2- venting fan (220v)
3- buzzer 12v
4- 3 leds green yellow red as co consntration
5- LCD 16x2 backlight
and if u have any information about co detector connection to pic16f877a
:idea:
 

I didn't study wtih any kind of CO sensor . If it behaive like potentiometer ( changing voltage according to CO changes) you can use AD inputs..
 

Take a look at the NAP-78A CO sensor .. see pictures below ..

**broken link removed**

The Nemoto's CO gas sensor features;

The detectable gas concentration range is 0 - 3,000 ppm, and because of the excellent linearity shown in the Figure 1, accurate detection is possible.
Click to expand...

Its output is voltage, so it can be easily interfaced to a PIC microcontroller with A/D ..

Regards,
IanP
 

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    modi_81

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Hi modi_81,
When i browse thru the WEB i found this project that may be will be helpful to you
**broken link removed**

Enjoy
Linoko
 

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    modi_81

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