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8 pcs Push Button Switch 4 Keyboard Module key Board Keypad for Arduiuo DUE Breadboard Leonardo ZERO Tre Micro banana pi Zigbee

8 pcs Push Button Switch 4 Keyboard Module key Board Keypad for Arduiuo DUE Breadboard Leonardo ZERO Tre Micro banana pi Zigbee

Regular price $25.52 USD
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SPECIFICATIONS

Brand Name: NoEnName_Null

Origin: Mainland China

Model Number: TB371*8

is_customized: Yes

Numbers: 4 key

Output Level: Low level(0)


Product Name:8pcs Push Button Switch 4 Keyboard Module key Board Keypad for Arduiuo DUE Breadboard Leonardo ZERO Tre Micro banana pi Zigbee

Packing list( Does not include UNO R3 Board ):
 
8 PCS 4xkey push button switch module;
 


Description:

Can be inserted directly into Arduiuo uno mega2560 due Leonardo ZERO,Ideal for linking up to your Arduiuo DUE UNO Pro Mini Nano Mega2560 Breadboard raspberry pi banana pi etc,or others MCU PLD CPU ( AVR STM32 ARM PIC C51 Zigbee NRF24LE1 CC2530 MSP430 STM8 FPGA CPLD etc.)


1 4-button Common Cathode botton board(When pressed button, output low level).


2 '' GND K1 K2 K3 K4'' 4 PIN OUT 2.54mm Pin Header

 

3 Working voltage: DC 0-48V(Can be DC 1.8V 2.5V 3.3V 5V 12V 24V 36V 48V)

4 Size: 12.7MM x 33MM.

 
Arduiuo uno/mega2560/ Leonardo 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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