Arduino Fume Extractor


I want to build a fume extractor for soldering. I want to use a MQ2 carbon-dioxide sensor, a blue LED that comes comes on (high) when the sensor detects smoke and off (low) when no smoke is detected, and a RED that comes on (true) when there is power to the fans and off (false) when the fans are off. I also would prefer to control everything with an Arduino Nano. There is a need to drop down the 12V supply to 5V for the Nano, Mosfet, and LED’s, so a can buy a buck converter shield of build a buck converter.


Hey Gary,
Sounds like you have your project figured out in terms of hardware. What kind of help do you need?
Anat from