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 Features:

• Introduction:

  This module is based on a resistive divider principle design, make the interface terminal input voltage reduced 5 times, A rduino analog input voltage up to 5V, then the input voltage of the voltage detection module can not be greater than 5V × 5 = 25V (if used 3.3V system, the input voltage can not exceed 3.3Vx5 = 16.5V). Because A rduino AVR chips used in 10 AD, so the resolution of the analog module is 0.00489V (5V / 1023), so the voltage detection module detects a minimum input voltage of 0.00489V × 5 = 0.02445V.

   

  Parameter:

  Voltage input range: DC0-25V

  Voltage detection range: DC0.02445V-25V

  Voltage analog resolution: 0.00489V

  Wiring:

  DC input connector:

   

  the positive terminal connected to VCC,

  the negative  connected to GND

  Output interface:

  "+" is 5 / 3.3V,

  "-" then GND,

  "s" A rduino connected to the AD pin

  Code:

  #include 

  int val11; int val2; void setup() {    pinMode(LED1,OUTPUT);    Serial.begin(9600);    Serial.println("Emartee.Com");    Serial.println("Voltage: ");    Serial.print("V"); } void loop() {        float temp;        val11=analogRead(1);        temp=val11/4.092;        val11=(int)temp;//        val2=((val11%100)/10);        Serial.println(val2);           delay(1000); }                    

1 x  Voltage detection Module