I ran this against just one button & led and sent the value of digitalRead(Switch) and LEDstate out to serial monitor so I could see how they changed when I pressed the button. Now in this tutorial, we have presented two examples. I have a homemade midi footswitch with five guitar-pedal type buttons, each with an LED. Arduino Uno has 14 digital I/O Pins which will be referred as GPIO. Arduino toggle switch codeĬode 1 const int Switch = 2, LED = 3 int state = 0, LEDstate = 0 void setup ( ) In the program below, the first thing you do is to initialize pin 9 as an output pin with pinMode ( ) function in setup ( ) routine. Refer : Relay interface with the Arduino. Here's the 'Button' code, embedded using codebender Keep in mind that setup ( ) routine runs only once after power on / re-program or press the reset button. Then 230V/110V AC loads or similar loads with external supply can be controlled by the circuit. The circuit can be modified to operate with high power loads with the same arrangement by just replacing the LED with a relay circuit. The digital pin 2 is taken as the input pin connected with a pull-down resistor to avoid any false triggerings. Below given is a sample code to ON and OFF LED with a push-button. In this tutorial, we are going to use pushbuttons, arcade buttons and Arduino.
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