24pcs Universal DC 0-48V 4 key push button switch Module

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Model Number
TB371*24
Customizable
Yes
key keypad
4 button
Output Level
Low level
Operating Voltage
DC 0-48V


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Product Name:24pcs Universal DC 0-48V 4 key push button switch Module Keyboard Matrix Board for PIC PLC ARM FPGA CPLD MCU Development Board
 

Packing list:
 
24 PCS  4 key push button switch Module;
 
  

Description:

Can be inserted directly into Arduiuo uno mega2560,Ideal for linking up to your Arduiuo UNO Pro Mini Nano Mega2560 Breadboard raspberry pi etc,or others MCU ( PLC AVR STM32 ARM PIC AT89C51 MSP430 STM8 Xilinx Altera Lattice FPGA CPLD etc.)
  
1 4-button Common Cathode key module .
 
2 " GND K1 K2 K3 K4" 4 PIN OUT 2.54mm
 

3  Working voltage: Can be DC 1.2V 1.8V 2.5V 3V 3.3V 4.5V 5V 9V 12V 24V 36V 48V 

 
4 Size: 12.7MM x 33MM.

 

Arduiuo uno/mega2560 Code
 
//******************************************************//

 

/*
Arduiuo_4key_uart
 
This example code is in the public domain.
*/
 
// Define key pin
int K1 = 13;
int K2 = 12;
int K3 = 11;
int K4 = 10;
 
 
// variables will change:
int buttonState = 0; // variable for reading the pushbutton status
 
// the setup routine runs once when you press reset:
void setup() {
// initialize the keys pin as an input.
 
pinMode(K1, INPUT);
pinMode(K2, INPUT);
pinMode(K3, INPUT);
pinMode(K4, INPUT);
 
//Activate key pin internal pull-up resistors
digitalWrite(K1, HIGH);
digitalWrite(K2, HIGH);
digitalWrite(K3, HIGH);
digitalWrite(K4, HIGH);
 
// initialize serial communications at 9600 bps:
Serial.begin(9600);
}
 
// the loop routine runs over and over again forever:
void loop() {
 
buttonState = digitalRead(K1);
if(!buttonState)Serial.print("k1 \n" );
do
{
buttonState = digitalRead(K1);
}
while(!buttonState);//Wait button release
 
buttonState = digitalRead(K2);
if(!buttonState)Serial.print("k2 \n" );
do
{
buttonState = digitalRead(K2);
}
while(!buttonState);//Wait button release
 
buttonState = digitalRead(K3);
if(!buttonState)Serial.print("k3 \n" );
do
{
buttonState = digitalRead(K3);
}
while(!buttonState);//Wait button release
 
buttonState = digitalRead(K4);
if(!buttonState)Serial.print("k4 \n" );
do
{
buttonState = digitalRead(K4);
}
while(!buttonState);//Wait button release
 
delay(100);
}
    
 //******************************************************//

 

 

 

 

Circuit schematics : 

 

 

 

 

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DHL3 - 7 days
UPS Expedited3 - 7 days
EMS5 - 14 days
Post Air MailFree Shipping15 - 45 days
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N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller ServiceOn-time DeliveryIf you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).