I have a question about 555. I am trying to create (circuit diagram) a 5 minute count-down which is supposed to make a noise (buzzer) EVERY minute. So when the timer reaches 4 minutes it will make a noise and it reaches 3 minutes it will make a noise.
I have tried different thing circuits I found on the web but none of them really do what I need. Can someone link me a page that could possible help me with this?
I have tried different thing circuits I found on the web but none of them really do what I need. Can someone link me a page that could possible help me with this?