Education

Robo Explorers 1

Beginners guide to Robotics

Introduction to PCB

Arduino

Yellow LED

Buzzer

Potentiometer

3 LED Math

Motor

Yellow LED

Robo Explorers

LEDs are small bulbs which have two terminals. One is called the positive anode and the other is the negative cathode. These small light emitting diodes (LEDs) produce light with only 1.5 to 3.6 volts.

Let’s look at how the Yellow LED is connected on our Yellow Tyro Board.

Connecting LEDs to Tyro Board

#include <avr/io.h>  //gpio setup
#include <avr/interrupt.h> //for interupt service routines
#include <util/delay.h> // here the delay function is found
#include <stdio.h> // for printf and stuff
#include "usart.h" // serial communication

int main(void){
    int state = 0;
    DDRD = 0xFF; // FOR LED
    DDRC = 0xF0; // FOR BUTTON
    DDRB = 0xFF;
    PORTD = 0x00;
    PORTB = 0x00;
    PORTC = 0x3F;
    while (1){
        PORTD = 0b11111000;
        if(PINC==0b00111111){
            PORTB = 0b00000000;
        }
        if(PINC==0b00111101){
            
            PORTB = 0b00000001;
        }
        if (state == 0){
            if(PINC==0b00111110){
                PORTB = 0b00000010;
                _delay_ms(2000);
                state = 1;
            }
        }
        if (state == 1){
            if(PINC==0b00111110){
                PORTB = 0b00000100;
                _delay_ms(2000);
                state = 0;
            }
        }
    }
}