Voltage Sensor Module

This voltage sensor module is a reliable and safe solution for measuring voltage in your electronic projects! It works on the principle of a resistive voltage divider, which reduces a high input voltage to a safe level that can be read by an analog input of a microcontroller like Arduino. The module allows measurement of DC voltages in a wide range from 0 to 25V, making it perfect for monitoring the status of batteries (9V, 12V), power supplies, solar panels, and many others.

With simple connections and ready example code, the module quickly integrates into monitoring projects, allowing you to build your own voltmeter, track charge levels, or alert for low voltage. It connects directly to an analog input on Arduino, Raspberry Pi (with ADC), and other platforms.

Key Specifications:

• Principle: Resistive voltage divider (5:1 ratio)

• Measurement Range: DC 0V to 25V (when the module is powered with 5V)

• Minimum Detectable Voltage: ~0.02445V

• Analog Resolution: 0.00489V (with Arduino's 10-bit ADC)

• Output: Analog signal, proportional to the input voltage

• Compatibility: Arduino, Raspberry Pi (with ADC), ESP32, etc.

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 toGND
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);
}