Smart Electronics DC0-25V Standard Voltage Sensor Module Test Electronic Bricks Smart Robot Terminal Sensor for Arduino DIY

1. This module is based on principle of resistive voltage divider design, can make the red terminal connector input voltage to 5 times smaller. input voltages up to 5v,the voltage detection module input voltage not greater than 5Vx5=25V

• (if using 3.3V systems, input voltage not greater than 3.3Vx5=16.5V)

• 2. AVR chips have 10-bit AD, so this module simulates a resolution of 0.00489V (5V/1023),
  so the minimum voltage of input voltage detection module is 0.00489Vx5=0.02445V.

• 
  Size: 28mm×14mmx25mm (approx)

• Voltage input range: DC0-25 V

• Voltage detection range: DC0.02445 V-25 V

• 
  Voltage analog resolution: 0.00489 V

• Output Interface: "+ " connected 5/3.3V, "-" connected GND, "s" connected AD pins

• DC input interface: red terminal positive with VCC, negative with GND

• By 3P connector, connect this module with the expansion of board, not only makes it easier for you to detect voltage battery, can also use the IICLCD1602 LCD to display voltage.
  
  Reference 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);