Hello,
My name is Rodger and I just started with the Arduino on Monday. I have made a code that will turn on an LED when the button is pushed, and turn it off when the button is released. Now the object is to push the button it turns on the LED but the Led won't turn off until the button is pushed again. Can some one point me in the right direction to find out what I need to do to make this work?
If i remember right the Debounce example does exactly this.
Furthermore if you wanted the LED to turn on/off after 5 pushes of the button, a simple addition the the debounce code would accomplish that.
It isn't after a certain number of pushes, it is when it is pressed and released the led comes on, then when it is pressed and released again the led goes off. This has to happen over and over again.
It isn't after a certain number of pushes
"one" is a certain number 
Ok I see what you are saying, but the issue is how does the arduino board know if it is supposed to turn on or turn off the led? Not trying to be difficult, I just don't understand.
Then you can simply use the Debounce example the way it is. Here is the description from the example.
Debounce
Each time the input pin goes from LOW to HIGH (e.g. because of a push-button
press), the output pin is toggled from LOW to HIGH or HIGH to LOW. There's
a minimum delay between toggles to debounce the circuit (i.e. to ignore
noise).
The full code is in your arduino menu. [File] - [Examples] - [Digital] - [Debounce]
Thank you so much that really helps me to understand what is actually happening. I will give it a try.
The debounce description is kind of miss leading. It will not work the way you want.
Here is a code i just wrote that will do what you want.. Its not fancy, I wrote it in a hurry.
// set pin numbers:
const int buttonPin = 3; // the number of the pushbutton pin
const int ledPin = 13; // the number of the LED pin
// Variables will change:
int ledState = LOW; // the current state of the output pin
int buttonState; // the current reading from the input pin
void setup() {
pinMode(buttonPin, INPUT);
pinMode(ledPin, OUTPUT);
}
void loop() {
if (buttonState == HIGH){ // Check if button was being pressed. (in software)
if (digitalRead(buttonPin) == LOW){ // Check if button still is being pressed. (in hardware)
buttonState = LOW; // If not, set state to low. (in software)
}
}else if (digitalRead(buttonPin) == HIGH){ // Check if button is high due to noise or being pressed
delay(50); //Debounce time
if (digitalRead(buttonPin) == HIGH){ // Button Pressed not noise
buttonState = HIGH; // Set the software check for button still being pressed
if (ledState == HIGH){ // Check state of ledPin
digitalWrite(ledPin, LOW); // Change output state (hardware)
ledState = LOW; // Change state (in software)
} else if (ledState == LOW){
digitalWrite(ledPin, HIGH);
ledState = HIGH;
}
}
}
}
The code i just posted will allow you to press the button for as little or as long as you like and only count one press. Then change the led to the opposite state. There are better ways to-do this but this seems like it will be the easiest to understand, what is actually happening, for beginners.
Not to overwhelm people but here is another way to do it off the arduino tutorials.
If you change this line. Change the 4 to a 2 and it will work as you want.
before
if (buttonPushCounter % 4 == 0) {
after
if (buttonPushCounter % 2 == 0) {
This keeps track of the total number of press. If that number is a multiple of 2 it turns the light on. So every other press.
You can also read the number of presses on your serial monitor just for fun, if you don't need that feature there can be alot of code removed.
Im not trying to over post your thread just trying to help, and give you the most options for understanding the processes.