โมดูลวัดแรงดัน 0-25v เป็น 0-5v Voltage Sensor Electronic Building Block

void setup()
{
 Serial.begin(9600);
 Serial.println("ModuleMore.Com");
 Serial.println("Voltage: ");
}
void loop()
{
 int raw = analogRead(A0);
 float volt = 5.0*raw / 1023.0;
 Serial.println(volt);
 delay(1000);
}

Module introduction:

This module is designed based on the principle of resistance divider, which can reduce the input voltage of the terminal interface by 5 times. The maximum analog input voltage of Arduin is 5V, so the input voltage of the voltage detection module cannot be greater than 5V×5=25V (if 3.3V is used For the system, the input voltage cannot be greater than 3.3Vx5=16.5V). Because the AVR chip used by Arduino is 10-bit AD, the analog resolution of this module is 0.00489V (5V/1023), so the minimum voltage detected by the voltage detection module is 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: terminal positive to VCC, negative to GND
Output interface: "+" to 5/3.3V, " -"Connect to GND, "s" to Arduin AD pin