Description
ACS712 provides economical and precise solutions for AC or DC current sensing in industrial, commercial, and communications systems.
Features
- Low-noise analog signal path
- Device bandwidth is set via the new FILTER pin
- 5 μs output rise time in response to step input current
- 80 kHz bandwidth
- Output voltage proportional to AC or DC currents
- Factory-trimmed for accuracy
- Extremely stable output offset voltage
- Nearly zero magnetic hysteresis
- Ratiometric output from supply voltage
Getting started with the 5A range Current Sensor Module ACS712 Module
Sensing and controlling current flow is a fundamental requirement in a wide variety of applications including, over-current protection circuits, battery chargers, switching mode power supplies, digital watt meters, programmable current sources, etc. This ACS721 current module is based on ACS712 sensor, which can accurately detect AC or DC current. The maximum AC or DC that can be detected can reach 5A, and the present current signal can be read via analog I / O port of Arduino.
Hardware required
Connecting the Hardware
Arduino test the crrrent.
Notice:Current sensor can not directly connect on both ends of the power supply.
Upload the following sample sketch:
void setup() {
Serial.begin(9600);
}
void loop() {
float average = 0;
for(int i = 0; i < 1000; i++) {
average = average + (.0264 * analogRead(A0) -13.51);//for the 5A mode,
// average = average + (.049 * analogRead(A0) -25);// for 20A mode
// average = average + (.742 * analogRead(A0) -37.8);// for 30A mode
delay(1);
}
Serial.print(“Current :”);
Serial.print(average/1000);
Serial.println(“A”);
}
NOTE: If you get stray error the problem is with your “and” characters .Replace them with ordinary quotes “. And you should be fine.
Open the serial monitor.You can see the current you test.
