Voltage detection module VOLTAGE SENSOR voltage sensor electronic building block

Module introduction:

This module is designed based on the principle of resistance division voltage, which can reduce the voltage of the terminal interface input by 5 times, and the maximum input voltage is 5V, so the input voltage of the voltage detection module cannot be greater than 5V × 5 = 25V (if the 3.3V system is used, the 3.3V system is used for system, The input voltage cannot be greater than 3.3VX5 = 16.5V).Because the AVR chip used is 10 -bit AD, the analog resolution of this module is 0.00489V (5V/1023), so the voltage detection module detection input into the minimum voltage of 0.00489V × 5 = 0.02445V.
parameter:
Voltage input range: DC0-25V
Voltage detection range: DC0.02445V-25V
Voltage simulation resolution: 0.00489V
DC input interface: terminal is connected to VCC, negative electrode connecting GND
Output interface: "+" connect 5/3.3V, "-" to GND, "s" connected AD pin

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 test;
Val11 = Analogread (1);
temp = Val11/4.092;
Val11 = (int) test; //
Val2 = ((Val11%100)/10);
Serial.println (Val2);
delay (1000);
}