I've been looking for example projects of people making flame detectors with microcontrollers. Most people seem to be using the IR type of sensors and it seems fairly easy to replicate. However I am interested in a more rugged flame detector and was thinking of flame rods like those used in furnaces or UV scanners like those from honeywell.
Basically I'd want an arduino or similar microcontroller to act as a flame relay, with a normally open and a normally closed contact. Flame relays seem to be common in process industry but expensive for hobbists.
The flame rod principle seems easy enough... just have to measure some microamps from the flame rod to ground. Perhaps an ADC with a programmable gain amplifier?
Now of course, safety equipment like this is better something not be DIYing. But I am curious if it can be done and maybe I could build a testing rig just because.
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