Voltage Sensor 電壓感測器 電壓檢測模組

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產品編號： VMD-002070

Voltage Sensor 電壓感測器 電壓檢測模組
此模組基於電阻分壓原理所設計，能使端子介面輸入的電壓縮小5倍，Arduino類比輸入電壓最大為5V，那麼電壓檢測模組的輸入電壓則不能大於5V×5=25V（如果用到3.3V系統，輸入電壓不能大於3.3Vx5=16.5V）。因為Arduino所用AVR晶片為10位元AD，所以此模組的類比解析度為0.00489V（5V/1023），故電壓檢測模組檢測輸入最小電壓為0.00489V×5=0.02445V。

電壓輸入範圍：DC0~25V
電壓檢測範圍：DC0.02445V~25V
電壓類比解析度：0.00489V
DC輸入介面：端子正極接VCC，負極接GND
輸出介面：”+”接5/3.3V, “-“接GND，”s”接Arduino的AD引腳


#include <Wire.h>
int val11;
float val2;


void setup()
{
Serial.begin(9600);
Serial.println("Voltage: ");
Serial.print("V");
}
void loop()
{
float temp;
val11=analogRead(1);
temp=val11/4.092;
val2=(temp/10);
Serial.println(val2);


delay(1000);
}

A simple but very useful module which uses a potential divider to reduce any input voltage by a factor of 5. This allows you to use the analogue input of a microcontroller to monitor voltages much higher than it capable of sensing.
For example with a 0V - 5V analogue input range, you are able to measure a voltage up to 25V.

This module also includes convenient screw terminals for easy and secure connection of a wire.
This module is based on a principle of resistive voltage divider design, can make the red terminal connector input voltage to 5 times smaller. Arduino analog input voltages up to 5v, the voltage detection module input voltage not greater than 5Vx5=25V (if using a 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 0.00489Vx5=0.02445V.

Specification:

Divider ratio: 5:1
Resistor Tolerance: 1%
Max input voltage: 25V
Resistor Value: 30K/7.5K Ohm

Pinout:

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 (0 - 25V)

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.


 
Schematic
The schematic for this is pretty straight forward.  As previously mentioned, its just a couple of resistors.   In fact, you could build your own in a pinch.



 
Voltage Sensor Module tutorial  (by HenrysBench)
The Connections
Find yourself a 9 volt battery and connect it,  your voltage sensor module and Arduino as shown below.





The Sketch
Enter the following sketch, upload it and go

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