Most Simplest Toggle Switch With Arduino


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An Electrical Engineering Teacher in Athens Greece. Most of these small projects here, are constr...

Simple! I hope you like it! Enjoy to fool around!

Nothing more to say than in the commenting code...

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Step 1: The Code

/*********************
Simple toggle switch
Created by: P.Agiakatsikas
*********************/

int button = 8;
int led = 13
int status = false;

void setup(){
pinMode(led, OUTPUT);
pinMode(button, INPUT_PULLUP); // set the internal pull up resistor, unpressed button is HIGH
}

void loop(){
//a) if the button is not pressed the false status is reversed by !status and the LED turns on
//b) if the button is pressed the true status is reveresed by !status and the LED turns off

if (digitalRead(button) == true) {
status = !status;
digitalWrite(led, status);
} while(digitalRead(button) == true);
delay(50); // keeps a small delay
}

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    3 Discussions

    None
    pagaldunia

    Question 1 year ago

    HI,

    Can we connect 8 push buttons to the Arduino Uno and Control 8 outputs as LED's ?

    None
    Mursy Jesse

    Question 1 year ago on Step 1

    A great help, thanks! could you please xapin thw purpose of the "while" statemet at the end? i had to remove it as the code didnt seem to work with it in

    None
    JoshuaM285

    1 year ago

    Thank you for this, but I noticed two things that should be corrected.

    1. "int led = 3" is missing a ;

    2. The LED in the diagram is backwards.

    Great sample for a project I'm working on nonetheless. With a little troubleshooting I got it to work.