Hello,
I want to ask new, because the main question could be confusing.
The situation:
There's a pwm driven Motor. On the high side current is measured with a shunt and the corresponding voltage is amplified with an opamp circuit to 0,2 - 4V. This voltage goes to the ain input of the arduino.
So, you know that pwm current isn't smooth so the simplest measurement method is to measure at the right time -> if the digital port of the pwm driver is high.
Now my question again:
Is there a function (or any way) to call to find out that the digital port (pwm driven) is just now high?
Also I could take some true rms ics like the AD636. I won't need it because I don't need any absolute measurements here.
The 3rd method would be to measure like the ad636:
Vrms = (Avg * ( Vin^2) )^(1/2)
Any code suggestions?
Thanks!