In 2017, fires claimed the lives of over 3,390 people in the United States. Please use extreme caution when working around fire or accelerants.
For those that are not aware, flame rectification is the process by which the presence of a flame partially rectifies an AC power source. This slight AC rectification creates a measurable DC current in the low micro-amp range and is how a normal short is distinguished from the type of short a flame produces. A normal short will cause equal current draw in both directions, but a flame is conductive in only one direction like a diode. In fact, diodes are used in place of an actual flame to test furnace controllers.
ALL that being said and knowing the risks involved, who wants to contribute to an Arduino friendly solution for an effective proof of flame circuit?
Many capable individuals around the world tinker in brewing, fabricating, HVACR, and other prototype applications and are looking to automate their systems using the Arduino. One area where the community is pretty much vacant is in the flame detection department. I don't really consider the optical flame sensors that detect 760-1100nm IR light to be something you could use in an actual application that doesn't involve Bics and candles... So let's explore more pro options!