dear experts i have purchased alcohol sensor from the sparfun.com and according to data sheet i have connected 10k ohm resistor accross it and switche on for one whole day and night after that i try to write code and when alchol is not detected 200 value shows in the lcd i it should have shown valu…

MQ-3 alcohol sensor

santoshaxl October 6, 2012, 4:19pm 4

yes 10k is connected to the ground and when the alcohol is present value varies from 200 to 1024 but when alcohol is not present shows value 200 my wiring is correct

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MQ-3 alcohol sensor

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