This is a simple but very useful module
which uses a potential divider to reduce an input voltage by a factor of
5. The Voltage Sensor Module 25V allows you to use the analog input of a
microcontroller to monitor voltages much higher than it capable of
For example with a 0-5V analog input range, you are able
to measure a voltage up to 25V. This voltage sensor module also
includes convenient screw terminals for easy and secure connection of a
This module is based on the principle of resistive
voltage divider design, can make the red terminal connector input
voltage to 5 times smaller. Arduino analog
input voltages up to 5 v, the voltage detection module input voltage
not greater than 5Vx5=25V (if using 3.3V systems, input voltage not
greater than 3.3Vx5=16.5V).
Arduino AVR chips have 10-bit AD,
so this module simulates a resolution of 0.00489V (5V/1023), so the
minimum voltage of input voltage detection module is
in mind, you are restricted to voltages that are less than 25 volts.
More than that and you will exceed the voltage limit of your Arduino
By 3P connector, connect this module with the expansion of board Arduino, not only makes it easier for you to detect voltage battery.
You can also use the IICLCD1602 LCD to display voltage.
DC input interface: red terminal positive with VCC, negative with GND