Voltage detection module โมดูลวัดแรงดันไฟฟ้า 0-25 โวลต์

Voltage detection module 0 - 25 Volt โมดูลวัดแรงดันไฟฟ้า 0 - 25 โวลต์ Module introduction: This module is designed based on the principle of resistor divider to reduce the input voltage of the terminal interface by 5 times and the analog input voltage to 5V at most. The input voltage of the voltage detection module cannot be greater than 5V 5 = 25V (if a 3.3V system is used) The input voltage cannot be greater than 3.3Vx5=16.5V). Because the AVR chip used by A is a 10-bit AD, the analog resolution of this module is 0.00489V (5V/1023), so the voltage detection module detects that the input minimum voltage is 0.00489V5=0.02445V. Parameters: Voltage input range: DC 0-25V Voltage detection range: DC0.02445V-25V Voltage analog resolution: 0.00489V DC input interface: terminal positive terminal is connected to VCC, negative terminal is connected to GND output interface: "+" is connected to 5/3.3V, - "Connect GND," s" to Arduino's AD pin Code : int analogInput = A1; int LED = 2; float vout = 0.0; float vin = 0.0; float R1 = 30000.0; //30k float R2 = 7500.0; //7500 ohm resistor int value = 0; void setup() { pinMode(analogInput, INPUT); pinMode(LED, OUTPUT); Serial.begin(9600); Serial.println("BASIC DC VOLTMETER"); } void loop() { // read the value at analog input value = analogRead(analogInput); vout = (value * 5.0) / 1024.0; vin = vout / (R2/(R1+R2)); Serial.print("Voltage = "); Serial.println(vin,2); delay(500); if (vin > 12 ){ digitalWrite(LED, HIGH); } if (vin digitalWrite(LED, LOW); } } https://www.electronicshub.org/interfacing-voltage-sensor-with-arduino/