​PRODUCT DESCRIPTION:​

The Arduino analog input is limited to a 5 VDC input.   If you wish to measure higher voltages,  you will need to resort to another means.  One way is to use a voltage divider. It is fundamentally a 5:1 voltage divider using a 30K and a 7.5K Ohm resistor.Keep 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 input.

Input:

• GND – This is where you connect the low side of the voltage you are measuring.   Caution! : This is the same electrical point as your Arduino ground.
• VCC: The is where you connect the high side of  the voltage you are measuring

Output:

• S:  This connects to your Arduino analog input.
• – (or minus): This connects to your Arduino ground.
• +: This is not connected.  It does absolutely nothing.

PACKAGE INCLUDE:

• 1 X  Voltage Detection Sensor Module up to 25V Generic