hi,im new with arduino. i have a sketch by someone on youtube.
What i read from analog pin(A0) is either 800 or 17 with A2 as output HIGH
If i use 5v pin instead of A2,analog pin(A0) is either 750 or 65. im so confused why would it happen?
I measured the voltage between ky-033's v&g is 4.7 with A2 pin , 5.2V with 5v pin !
but it have same voltage 5.2v before connecting ky-033! why?
Really sorry for my bad english,hope you can understand what im trying to say!