Key Button Board LED Module Kit for Arduino MEGA2560 Pro Mini Nano Due Teensy++

Product Name:Key Button Board LED Module kit for Arduiuo MEGA2560 Pro mini nano due Teensy++

Packing list:

1 PCS 4 button Key Board;

1 PCS 6 bit RED LED Board;

Description:

Can be inserted directly into Ardiuno uno mega2560,Ideal for linking up to your Ardiuno UNO Mini Nano Mega2560 etc,or others MCU ( AVR STM32 ARM7 ARM9 ARM10 PIC AT89C51 STC MSP430 FPGA CPLD etc.)

key board:

1 4-button Common Cathode key module .

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

3 Power Supply Voltage:3.3V-12V

4 Size: 12.7MM x 33MM.

led board:

1 6 bit Blue Common Cathode LEDS.

2 7 PIN OUT 2.54mm

3 1K ohm Limiting resistor

4 Power Supply Voltage: 3.3-12V;

5 Size: 17.78MM x 11.43MM.

Circuit schematics :

Ardiuno uno/mega2560 Code

//******************************************************//

/*

Ardiuno_4key_6led

This example code is in the public domain.

*/

// Define key pin

int K1 = 13;

int K2 = 12;

int K3 = 11;

int K4 = 10;

// Define led pin

int GND = 6;

int D1 = 5;

int D2 = 4;

int D3 = 3;

int D4 = 2;

int D5 = 1;

int D6 = 0;

// 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);

// initialize the leds pin as an output.

pinMode(GND, OUTPUT);

pinMode(D1, OUTPUT);

pinMode(D2, OUTPUT);

pinMode(D3, OUTPUT);

pinMode(D4, OUTPUT);

pinMode(D5, OUTPUT);

pinMode(D6, OUTPUT);

//Activate key pin internal pull-up resistors

digitalWrite(K1, HIGH);

digitalWrite(K2, HIGH);

digitalWrite(K3, HIGH);

digitalWrite(K4, HIGH);

//as LED GND

digitalWrite(GND, LOW);

}

// the loop routine runs over and over again forever:

void loop() {

buttonState = digitalRead(K1);

digitalWrite(D1, buttonState); //

buttonState = digitalRead(K2);

digitalWrite(D2, buttonState); //

buttonState = digitalRead(K3);

digitalWrite(D3, buttonState); //

buttonState = digitalRead(K4);

digitalWrite(D4, buttonState); //

digitalWrite(D5, HIGH); // turn the LED on (HIGH is the voltage level)

digitalWrite(D6, HIGH); // turn the LED on (HIGH is the voltage level)

}

//******************************************************//