Countdown Creation: Arduino Timer with OLED Display using millis() function

Few weeks back I posted a tutorial on millis function where I was using this function to multitask, process slice in Arduino Code.
In this Tutorial I am showing you how to create delayed trigger mechanism.
I use it to build the eggtimer but it can be used in the veriaty of projects

The code and a list of components can be found here:

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Music credits:
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Track: The Island — tubebackr [Audio Library Release]
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[Marisha-home]

This is sooo good explained!! ❤❤❤ Thank you so much!! Please do more videos!!🙏

[backyardcnc]

It needs a temperature sensor so that it automatically starts the timer once the water hits boiling temp! Then the eggs would be perfect!

[jromhek]

Thanks man .. I need this project with some modifications like different screen and batteries . Keep up the good work .

[carrizzle]

Are you using a timer library or something because I have never seen an if statement that looked like the one in your code.

[Michi]

Hi, this project is exactly, what I was searching for. Perfect for my needs.
Unfortunately, the links do not work.
Can you please tell me, how I can get the code?

[LDRCdriver]

Hi. I want to thank you for making your work on this available for us to use. I'm trying to implement this on my project but when I long press the start button it shows the bell instead of starting the countdown timer. I'm sure they're connected correctly since I can increment the minutes without any problem...it seems that it doesn't recognise this" if(State==1)"

[cursosvvr]

Hi!! I would like to know if it is possible to use OLED i2C SSD1306 128X64 (which only has 4 pins). You used SPI (with 7 pins). Is it possible to use oled i2C in this project?

[mesquitamk]

VERY GOOD LEGAL YOUR DESIGN. HOW TO PLACE A RELAY TO TURN OFF THE TRAILER? I DO NOT KNOW HOW. SO I KNOW COPY AND NECKLACE

[raymtnz]

Hi, if I only have OLED Display SSD1306 128x32 to display the timer, what should I change in the code and where do I plug the SCL and SDA? Thank you.

[hafizuddindin]

hey, how about making a timer for hours and minute ? can u help me, Thanks

[gauravbhattarai]

I guess those are pull down resistors.

[rsshocks]

Hi do you know if its possible to use this on a 128x64 pixel screen. If possible is there an easy solution to change in the code thanks!!

[ashokoza]

Hey brother, can you share the CODE ? (Given link has no such project or CODE !)

[RTCTimer]

hello can i have the code as the arduino project hub link is not working

[volodymyrkostenko]

String TimeLeft(unsigned long MsLeft){
String Result;
int M;
int S;

M = (long)MsLeft/60000;

if(M<10){
Result = (String)"0"+M+":";
} else {
Result = (String)M+":";
}

S = (long)( (MsLeft-M*60000)/1000 );

if(S<10){
Result = (String)Result+"0"+S;
} else {
Result = (String)Result+S;
}
return Result;
}