B25 0 to 25V Voltage Sensor Module

This voltage sensor module is based on resistive voltage divider design principles. It is capable of reducing five times of the voltage of the input terminal connection. You can use a maximum voltage of 5V on the ADC side of the module so that it allows a maximum of 25V on the input side. If 3.3V is used, the input voltage must not exceed 16.5V.

Check out the video explantion from Robojax:

Due to AVR chips use 10 bit ADC, the maximum resolution of this module is 0.00489V (5V / 1023), so the voltage detection module detects minimum input voltage is 0.00489V × 5 = 0.02445V.

Specifications: 

• Input voltage range: DC 0-25V
• Voltage detection range: DC0.02445V - 25V
• Voltage analog resolutions: 0.00489V
• DC Input: positive terminal connected to VCC, GND negative pole
• Output interface: "+" then 5 / 3.3V, "-" then GND, "s" then the AD pin
• Size: Approx 27*14*12mm/ 1.06 x 0.55 x 0.47inch

• 1 x B25 0 to 25V Voltage Sensor Module 

• Interfacing Voltage Sensor with Arduino - Measure up to 25V using Arduino, tutorial  by Ravi in Electronics Hub
• Arduino 25V Voltage Sensor Module User Manual, by Henry's Bench
• Arduino Voltage Sensor 0-25V, by Superfish1000 in Instructables