Question

By using Arduino write a code that connects two LEDs to two push-buttons. Each button controls the state of its connected LED. The LEDs can be in one of two states: Blink-mode or Off-mode. When a button-press event is detected, its connected LED will begin blinking (turning on and off) and when a button-press is detected, its connected LED will turn off. The application should blink one of the LEDs at a rate of 1 second, and the other LED at a rate of 2 seconds. (By using Arduino coding )

Answer 1

Code:

void setup() { pinMode(2,INPUT);//button 1 pinMode(3,INPUT);//button 2 pinMode(5,OUTPUT);//led 1 pinMode(6,OUTPUT);//led 2 } int led1state=0,led2state=0; void blinkLed(int pin,int delay) { digitalWrite(pin,HIGH); delay(delay*1000); digitalWrite(pin,LOW); delay(delay*1000); } void offLed(int pin) { digitalWrite(pin,LOW); } void loop() { int i=digitalRead(2); int j=digitalRead(3); if(i>=1) { if(led1state==0) led1state=1; else led1state=0; } if(j>=1) { if(led2state==0) led2state=1; else led2state=0; } if(led1state==1) { blinkLed(1,1);//first led for 2 seconds of delay } else { offLed(1); } if(led2state==1) { blinkLed(2,2);//second led for 2 seconds of delay } else { offLed(2); } }

Code reference for indentation:

Explanation:

Connect push buttons to pin 2, pin 3; Led to 5, 6 pins. Ground them properly. Now two variables led1state, led2state is used to store the current state of the led. blinkLed takes two inputs, pin number and number of seconds the pin should be under delay. Now when a state change is detected the states are toggled. This continues until next push button change is detected