I'm completely new to Arduino, and I need to make a respiratory frequency detector.
It's basically a counter. I'm going to use a 1 bit signal as input (taken from an op-amp), every time a breath is detected. What I want to do is to count the number of rising edges received from the op-amp every 30 seconds, and then multiply them to get the number of breaths per minute.
The breath ratio will be shown either on a BCD display, or on an LCD.
I'm not new to programming, I know it's very easy, but I don't have too much time to achieve my objective. Do you have any advise or piece of code that could be useful?
P.S. I'm using the Arduino UNO SMD R2