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basically smoke sensor is an opto isolator (IR Tx and IR Rx) so when smoke particles come in between the Tx and Rx there is change voltage at the RX side
In the case of smoke detector, the design of casing and placing of the sensors inside the chamber will be complicated than the electronic circuitry for a better performance.
Hello,
You can use 8051 also in the place of TI controller. Check the specification of the TI controller pins and find out the equailent pins from 8051. If the specs are matching then u can just replace the controller. You may find an 8051 variant with inbuilt ADC. Actually the TI controller has very low power requirement. If you dont have any power constrains then there is no problem of using 8051. As I mentioned in the previous post design of the chamber is very important.
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