control ur home lighting , fan and AC with Tv or any ir remote using arduino Main component 1.arduino 2.relay 3.lm358 4.preset 5.photodiode 6.resistors 7.led 8.bc 548 9.diod 10.general purpose board 11.9v battery 12.any ir remote CODE /*created by shanu singh shanu12.kumar@<a href="http://gmail.com" target="_blank">gmail.com</a> turn on a LED when the button is pressed and let it on until the button is pressed again */ int pinButton = 8; int LED = 13; int stateLED = LOW; int stateButton; int previous = LOW; long time = 0; long debounce = 200; void setup() { pinMode(pinButton, INPUT); pinMode(LED, OUTPUT); } void loop() { stateButton = digitalRead(pinButton); if(stateButton == HIGH &amp;&amp; previous == LOW &amp;&amp; millis() - time &gt; debounce) { if(stateLED == HIGH){ stateLED = LOW; } else { stateLED = HIGH; } time = millis(); } digitalWrite(LED, stateLED); prev