Ks0275 keyestudio Voltage Detection Module Voltage Sensor

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Since the current electronic products are various, the voltage of the power supply is also different. It is indeed necessary to detect it with a suitable voltage detection module and controller. The maximum detection input voltage of the controller analog interface is 5V, which means the voltage greater than 5V will not be detected. However, this voltage detecting module can achieve to detect the voltage greater than 5 V , designed on the basis of resistor voltage divider principle, which can make the input voltage of binding post interface narrow 5 times, and the analog input voltage is up to 5 V, thus the input voltage of voltage detection module is not greater than 5 V * 5 = 25 V (if using 3.3 V system, the input voltage is not greater than 3.3 V*5 = 16.5 V). Since the AVR chip is 10-bit AD, the analog resolution of this module is 0.00489 V (5V / 1023), and the minimum input voltage of the voltage detection module is 0.00489 V * 5 = 0.02445 V. When 3P sensor connection cable plugs into sensor expansion board, it can not only easily detect the magnitude of the voltage power and monitor the battery-powered electricity of interactive media works or robot, but also can display the voltage and make a voltage monitor through IICLCD1602 LCD module.



  • Working voltage :0V-25V DC
  • Signal type: analog signal

Connection Diagram


Sample Code

int analogpin=0;              // Define analogpin as analog port 0               
int val,val5;                     //Define variables val,val5
int val2=0;                     //Define variables val2
int val3=0;                     //Define variables val3
int val4=0;                     //Define variables val4

void setup()
    Serial.begin(9600);     //Set baud rate of 9600
void loop()
    int val,val5;
    float val1;
    val=analogRead(analogpin);           //Read the value of the analog port and assign it to the variable val
    Serial.print("$CLEAR\r\n");                 //clear the screen
    Serial.print("$GO 1 1\r\n");                 
    Serial.print("$PRINT Voltage:\r\n");         
    Serial.print("$GO 1 9\r\n"); 
    Serial.print("$PRINT ");         
Serial.print(val3);                          //The serial port prints the value of the variable val3
Serial.print(val2);                          //The serial port prints the value of the variable val2
    Serial.print(".");                                //The serial port prints out a point"."
    Serial.print(val4);                          //The serial port prints the value of the variable val4
    Serial.println("V");                          //The serial port prints out capital “ V”
    delay(100);                                       //delay 0.1 second


Done as the above wiring, compile and upload the code, powered-on, then open the serial port monitor, it will print out the current detected voltage value shown below.


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