This module is based on the design principles of resistive divider, can reduce the voltage of the input terminal connection five times, Arduino analog input voltage up to 5V, the input voltage of the voltage detection module can not exceed 5V × 5 = 25V (If you use a 3.3V system, the input voltage should not exceed 3.3V x5 = 16.5V). Since Arduino uses AVR chips in 10 AD, the simulation resolution of this module is 0.0089V (5V / 1023), so the voltage detection module detects a minimum input voltage of 0.0089V × 5 = 0.02445V.
Settings:
Input voltage: DC0-25V
Voltage detection range: DC0.02445V-25V
Analog voltage resolutions: 0.00489 V
DC Input: VCC connected positive terminal, GND negative pole
Output interface: "+" then 5/3.3V, "-" then GND, "s" then Arduino AD pin
