Arduino delay on timer

[claude1959]

Hi, I am new to Arduino and I have been trying to create a sketch where I have to push and hold down a button and after a 10 second delay an output comes on and stays on until the button is released and it turns off without delay. I have been playing around with the debounce sketch but it toggles on alternate presses of the button and has a delay on release of the button which I don't want. I wonder if someone could help an old newbie.

[Idahowalker]

Code in code tags, image of your project, schematic?

[claude1959]

I am using the debounce sketch from the Arduino examples library.

[paulpaulson]

Hello and good morning
Your sketch needs a button-handler incl. debouncing and a timer function based on the BLINKWITHOUTDELAY example of IDE.
Have a nice day and enjoy coding in C++.

p.s. Take some time for a search for this typical school assignment inside the forum.

[sterretje]

@claude1959, your topic has been moved to a more suitable location on the forum. Installation and Troubleshooting is not for problems with (nor for advise on) your project See About the Installation & Troubleshooting category.

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Debouncing will always result in delays but you don't need it with the long 10 second wait that you have. You need a millis based approach. Below should work.

void loop()
{
  // start time when button became pressed.
  static uint32_t startTime;
  // remember if button is pressed or not
  static bool buttonIsPressed = false;

  byte buttonState = digitalRead(buttonPin);
  if (buttonState == LOW)
  {
    buttonIsPressed = true;
    startTime = millis();
  }
  else
  {
    buttonIsPressed = false;
    digitalWrite(somePin, LOW);
  }

  if (buttonIsPressed == true)
  {
    if (millis() - startTime >= 10000UL)
    {
      digitalWrite(somePin, HIGH);
    }
  }
}

Connect button between pin and GND and use pinMode(buttonPin, INPUT_PULLUP) in setup().

// Edit
There will be a slight 'delay' due to bounce before the startTime becomes stable. If you don't want that, you have to look at state change detection and detect when the button becomes pressed.