No current is applied to ACS712 so it constantly outputs 1.5v. Other channels are not connected to anything.
I collect values to see them on plotter
Code: Select all
* int a0= analogRead(A0);
int a1= analogRead(A1);
int a2= analogRead(A2);
int a3= analogRead(A3);
Serial.print(a0);
Serial.print(" ");
Serial.print (a1);
Serial.print(" ");
Serial.print (a2);
Serial.print(" ");
Serial.print(a3);
Serial.println();
a0 blue
a1 red
a2 green
a3 yellow
I can not get:
1. Why A0 and A3 charts has quarter of the range spikes
2. Why levels of not connected channels are so different
2. Why a1 and a2 noise is so correlated