arduino acs712t elc-5A โมดูลกระแส วัตต์ โวล์

int analogPin=0;
int potentiometerPin=11;
void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(potentiometerPin,HIGH);
digitalWrite(potentiometerPin,HIGH);

}

void loop() {
  // put your main code here, to run rep                
//int analog=analogRead(analogPin);
int sensorValue=analogRead(A0);
float amps=(514-sensorValue)*27.03/1023; // สำหรับ 5A  185mV/A  , v=vcc/2
float maxAmps=max(maxAmps,amps);
float minAmps=min(minAmps,amps);
float noise=maxAmps-minAmps;
Serial.print(amps);
Serial.print(" ");
Serial.println(noise);
if (Serial.read() !=1){maxAmps=amps;minAmps=amps;}
delay(250);
}