The fire alarm system based on single chip design, want to use smoke sensor and infrared sensor + at89s52 devices do, to do physical, help choose the parts,

The subject isn't very good do smoke sensor is first react slowly second infrared sensor are generally linear signals, is only is to signal acquisition to slant a bit can all not make but also could be influenced by the interference of the sun I used to want to do but didn't do hope you can do well!
http://www.siliconray.com/development-tools.html
The fire alarm system based on single chip design, want to use smoke sensor and infrared sensor + at89s52 devices do, to do physical, help choose the parts,