![]() We often get calls when people discover their honey has darkened or crystallized. Try to avoid any complicated electronics in contact with the smoke - just have the sensor, if possible, and expect to have to periodically clean the LDR and LED illuminating it.I stopped by my parent’s assisted living apartment on the way to work today. They were enjoying breakfast when I arrived, so I sat at the table and visited with them while they ate. I noticed that the honey packets in the center of the table had darkened and I was thinking about honey on my drive in to work today. Smoke is filthy, particularly if from plant material or polymers, while soot from black smoke can be conductive*, and continued exposure to smoke is probably what killed your last dust sensor. If the smoke chamber with the sensor in it is transparent, or has any sort of windows in it, you'll need to do something to shield your LDR and the emitter whose light it's detecting, to ensure that the results can't be thrown off by turning out the lights (the case to achieve this is probably the source of a good portion of the expense of those dust sensors you were using).Īs an aside, what on earth are you doing where smoke is present during normal operation? Based on my observations regarding the impact of smoke on electronics (from computers discarded by smokers), cigarette smoke seems to have the same effect on the lifespan of electronics as that of the smoker. What are you talking about with something being backwards?Īs long as the values you're getting back from analogRead() are consistently effected by the level of smoke, it's just a matter of converting the number you get from analogRead() into a number that'll do what you want it to when you send it to analogWrite(). ![]() What it does when you're running that code? How the LDR is wired? Please do the drawing of the schematic for us, not a photograph of half of the project.
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