Tutorial 12: Blink an LED without using the delay() function: Arduino Course for Absolute Beginners

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[qaziabzy]

Thank you so much for the explanation, I am trying to code then upload a song onto an Arduino. Will this work (for the multiple chords)? For example

tone(BUZZER1, 329.628, 2000);

tone(BUZZER3, 391.995, 1000);

tone(BUZZER5, 1046.50, 300);

if(currentMillis - previous Millis > interval1) {

tone(BUZZER3, 391.995, 950);

}

So will these pieces of music overlap, but the delayed bit only overlap after 50 milliseconds?

[gamecity]

I programed a stepper motor that stop 24 time in one loop.
Would you know how to turn on an led for each stop ? So 24 blink.
LED on while motors stops. LED off while motor rotates. Thanx for your great help

[igorkutcher]

yes, delay will stop the program (or you need to mess with interrupts).

[jeevankumarreddyravuru]

Hi i am doing a project on blinking led with delay, the thing is there is some code in the examples for a led blink delay changing using a potentio meter but for me I have 3 LEDs and 3 potentiometers, by using these 3 potentiometers i want to control the delay of 3 LEDs individually i.e led 'A' blinking delay will be controlled by potentiometer ' A' and similarly for LED B and C, i tried many times but result is not as expected, i am new to the programming plz help me

[Xappt]

What if I would like to change the on and off time to my liking? Means that I just don't want to switch interval.

[harshsawant]

How can I do the same with buzzer, tone(buzzer, 450); and the noTone(); function

[guadalupeguerrero]

Hi... I still can not understand why unsigned long is inside thd void loop and not at the beginning of the sketch. Can you explain that to me? Thanks.

[krallopian]

Friendly FYI: If it takes 50 days to count over the millis() max, that would be ~ 4.32 trillion milliseconds - far more than the 4, 000, 000 mentioned, but I understand it wasn't important for the purpose of the video. =)