โมดูลวัดแรงดันไฟฟ้า, Volt Meter Sensor Module For Arduino

product description :

           This module is based on the principle of resistor divider designed to reduce the input voltage of the terminal interface 5 times, Arduin analog input voltage of 5V maximum, then the voltage detection module input voltage can not be greater than 5V × 5 = 25V (if used 3.3V System, the input voltage can not be greater than 3.3Vx5 = 16.5V). Because the Arduino AVR chip used for the 10-bit AD, so the module's analog resolution of 0.00489V (5V / 1023), so the voltage detection module detects the 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
DC input interface: the positive terminal of the terminal is connected to VCC and the negative terminal is connected to GND
Output interface: "+" then 5 / 3.3V, "-" connected to GND, "s" then Arduin the AD pin

ตัวอย่างโค้ด

#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);
}