Overview:

This module is a simple yet highly practical device that utilizes a potential divider to decrease any input voltage by a factor of 5. It enables you to utilize the analog input of a microcontroller to monitor voltages significantly higher than its normal sensing range. For instance, with a 0V - 5V analog input range, you can measure voltages up to 25V. The module is equipped with convenient screw terminals that facilitate easy and secure wire connections.
The module operates on the principle of resistive voltage divider design, reducing the input voltage by a factor of up to 5. This ensures that the voltage detected by the module's input does not exceed 25V (or 16.5V for 3.3V systems) when using Arduino analog input voltages up to 5V.
Please note that Arduino AVR chips have a 10-bit analog-to-digital (AD) converter, which results in a simulated resolution of 0.00489V (calculated as 5V/1023). As a result, the minimum detectable voltage for this module is 0.02445V (0.00489V x 5).

Specification:

• Divider Ratio: 5:1
• Resistor Tolerance: 1%
• Max Input Voltage: 25V
• Resister Value: 30K/7.5K Ohm
• Voltage input range : DC0-25 V
• Voltage detection range : DC0.02445 V-25 V
• Voltage analog resolution : 0.00489 V