Countdown matrix max7219

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1

Hi.

I have tried a lot, and I can setup the hardware, and upload a code to the arduino, but I can not write the codes myself I must admit.

I need help to write a code for a countdown timer, like used in escape rooms.
I'm thinking counting from 60 minutes to zero (mm:ss).

I would very much like to use a matrix max7219 and the other materials used in this prop.
http://webnight.free.fr/DIY/Matrix%20Arrows/site/index.html

It would be cool if the buttons could be for-
-Reset timer (to 60 minutes)
-Start countdown.
-Pause countdown.
-Set timer. (ex. hold down it will count (faster) up until you release, and then pause until Start or reset is pressed.
-(Maybe another button is needed to more easy set the time with the previous. ex. one for minutes and one for seconds.

If anybody could provide help I will be grateful.

Br. Jesper.

2

Hi arnebirger, I’ve made many escape room countdown timers like what you describe, but have not used that particular display. The 7219 is a good choice and there are a few good control libraries available.

It sounds like you haven’t purchased the hardware yet - is this for an escape room?

Pat.

3

Yes it is for an escape room, and I, actually already has the hardware. I have tried to change some other code to make it work but must admit that coding is not for my Brain to fully understand.

I like the look of the 7219 and would very much like to use it. I have seen it used before in escape rooms looking nice.

I have build some more or less simple projekts before, but only with codes I could find for it, and then changed small things with succes.