EK Technologies

 Interfacing a Light Emitting Diode (LED) with Arduino What is a LED? A light-emitting diode (LED) is a semiconductor device that produces light when an electric current flows through it. Applications: Indicators, Displays such as Matrix display, Led bulbs etc. Proteus Circuit of Turning on LED Arduino Code void setup() {   // put your setup code here, to run once: pinMode (7,OUTPUT);   // pin 7 (LED pin) configured as an output digitalWrite(7,HIGH);    // command to turn ON LED  } void loop() {   // put your main code here, to run repeatedly: }   Arduino Code for Turning ON/OFF LED Twice void setup() {   // put your setup code here, to run once: pinMode (7,OUTPUT);   // pin 7 (LED pin) configured as an output digitalWrite(7,HIGH);     // command to turn ON LED  delay(1000);                  // command for a 1 second delay digitalWrite(7,LOW);    // co...