An Exhaust Fan That Switches On Automatically On Detecting Smoke

By A. SAMIUDDHIN

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Normally exhaust fans installed in kitchens, including restaurant kitchens, keep running continuously—whether smoke is present or not. Here is how you can build a small electronic device that switches on the exhaust fan automatically only when there is smoke in the air. It switches the exhaust fan off when the smoke has been removed.

 

1 COMMENT

  1. couldn’t this project be done without any microcontroller? in my opinion, it looks like to prefer luxury a little bit, right? Because anymore its new habit (or fashion) to convert all analog circuits to programmed digital ones.
    Engineering or designing is to do everything more basic, more cheap and more practical. what do you do such this?

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