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Triggered arduino bell system, code problem. Answered

I need to pick a random .wav file from a sd card to play when triggered by the master clock.
Also, I have to play a tornado warning file when the when the master clock sendes 3 short signals. It might go somthing like this, 'TORNADO WARNING, PROCEED TO SAFE ROOMS' in a computer voice.


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Tuddel68 (author)2017-10-27

It is a small school and we have an existing bell system. I was just wanting to replace the irritating piezo buzzer and put something more interesting in. I think it will get approval, if not I still want to know how to do it.

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Downunder35m (author)2017-10-27

You need or the teacher need you to? ;)
What exactly is the problem as it seems I miss the question here?

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