VOLTAGE DETECTION MODULE

This module is designed according to the resistor voltage divider principle, which can reduce the input voltage at the terminal interface by a factor of 5.

The Arduino's analog input voltage is greater than 5V, so the input voltage of the voltage detection module cannot exceed 5V × 5 = 25V (if using a 3.3V system, the input voltage should not exceed 3.3V × 5 = 16.5V).

Because the AVR chip used in Arduino is a 10-bit analog-to-digital converter, the analog resolution of this module is 0.00489V (5V / 1023), so the voltage detection module detects an input voltage of 0.00489V × 5 = 0.02445V.

Description:

Input voltage range: DC 0-25V

Voltage detection range: DC 0.02445V-25V

Analog voltage resolution: 0.00489V

DC input interface: Positive terminal connected to VCC and negative terminal connected to GND

Output interface: + connected to 5/3.3V, - connected to GND, and S connected to the Arduino AD pin