This led circuit is for
show the signal of alarm gas detected and as lamp. At here has 5 led with different colour for each
one, 2 led for alarm system and the others 3 for lamp. This function when the
mq2 sensor detected gas and the lcd show
data. After that the alarm triger, at this time the led on. There has 2 led for
alarm system, 1 red led for the alarm and means danger. The others 1 is blue
led for show the house safe.
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