counting

JUST GOT MY ARDY new to this, "duh". I'm wondering how to count, say the number of times "BLINLK" blinks in order to change to a different blink? It doesn't seem to want to use "count" unless I'm doing something wrong. Probably not putting it in right. (count; count=0; count=count+1) Could someone instruct me on this operation in the BLINK sketch or point me to one that uses something similar? thanks gary

this what you're after? it's in your arduino ide or version 17:

/* 
 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 circuit:
 * LED attached from pin 13 to ground
 * pushbutton attached from pin 2 to +5V
 * 10K resistor attached from pin 2 to ground

 * Note: On most Arduino boards, there is already an LED on the board
 connected to pin 13, so you don't need any extra components for this example.


 created 21 November 2006
 by David A. Mellis
 modified 3 Jul 2009
 by Limor Fried


 http://www.arduino.cc/en/Tutorial/Debounce
 */

// constants won't change. They're used here to 
// set pin numbers:
const int buttonPin = 2;     // the number of the pushbutton pin
const int ledPin =  13;      // the number of the LED pin

// Variables will change:
int ledState = HIGH;         // the current state of the output pin
int buttonState;             // the current reading from the input pin
int lastButtonState = LOW;   // the previous reading from the input pin

// the following variables are long's because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
long lastDebounceTime = 0;  // the last time the output pin was toggled
long debounceDelay = 50;    // the debounce time; increase if the output flickers

void setup() {
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  // read the state of the switch into a local variable:
  int reading = digitalRead(buttonPin);

  // check to see if you just pressed the button 
  // (i.e. the input went from LOW to HIGH),  and you've waited 
  // long enough since the last press to ignore any noise:  

  // If the switch changed, due to noise or pressing:
  if (reading != lastButtonState) {
    // reset the debouncing timer
    lastDebounceTime = millis();
  } 
  
  if ((millis() - lastDebounceTime) > debounceDelay) {
    // whatever the reading is at, it's been there for longer
    // than the debounce delay, so take it as the actual current state:
    buttonState = reading;
  }
  
  // set the LED using the state of the button:
  digitalWrite(ledPin, buttonState);

  // save the reading.  Next time through the loop,
  // it'll be the lastButtonState:
  lastButtonState = reading;
}

thanks Chris I'll try that

Are you wanting something like this:

int ledPin =  13;    // LED connected to digital pin 13

int maxnum = 20;     // Blink the LED 20 times
int count = 0;       // Our blink counter

// The setup() method runs once, when the sketch starts

void setup()   {                
  // initialize the digital pin as an output:
  pinMode(ledPin, OUTPUT);     
}

// the loop() method runs over and over again,
// as long as the Arduino has power

void loop()                     
{
  if (count < maxnum) {
    digitalWrite(ledPin, HIGH);   // set the LED on
    delay(1000);                  // wait for a second
    digitalWrite(ledPin, LOW);    // set the LED off
    delay(1000);  // wait for a second
    
    count++;  // add one (1) to our count
  }
}

Based on your description, the above is what I think you were going after. The code is based on the Blink sketch…

:slight_smile:

That may be what I'm looking for cr0sh, thanks. It looks like it might count how many loops or blinks. I'll try it tomorrow.

THANKS TO cr0sh— it works
it’s not pretty — but it works!
/*
This sketch is a modified version “BLINK”
it blinks the led 9 times on pin 13
on the 10th blink it blinks led on pin 9 for about 1 sec
while this is not exactly 10 sec for every loop changing
some of the values should calibrate it
BIG THANKS TO cr0sh!!!
*/
int ledPin = 13; // LED connected to digital pin 13
int aOut = 9; // LED connected to digital pin 9

int maxnum = 9; // Blink the LED
int count = 0; // Our blink counter

// The setup() method runs once, when the sketch starts

void setup() {
// initialize the digital pin as an output:
pinMode(ledPin, OUTPUT);
pinMode(aOut, OUTPUT);
}

// the loop() method runs over and over again,
// as long as the Arduino has power

void loop()
{
if (count > 8)
{
digitalWrite(aOut, HIGH);
delay(998);
digitalWrite(aOut, LOW);

count=0;
}
if (count < maxnum) {
digitalWrite(ledPin, HIGH); // set the LED on
delay(500); // wait for a second
digitalWrite(ledPin, LOW); // set the LED off
delay(499); // wait for a second

count++; // add one (1) to our count
}
}

You're welcome - glad I could help! :)