Read current with ACS712 using PWM

Other Hardware Sensors
1

Hello, I have some problems with the sensor that I am using. The sensor that I am using you can find here. I use the 20A version. The problem I'm having is that the output of the sensor very chaotic is. At first, I thought it is because I'm using PWM to control a MOSFET that's connected to a power supply.
The frequency of the PWM did have some influence on it. for example:

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pin9 (uno) 3.9k Hrtz and
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pin6 (uno) 7.8k Hrtz.
And came here to ask if you would have an Idea to make the output more stable.

2

This is the part where members ask you to post an accurate drawing / schematic of your circuit, hand drawn is fine. Also a listing of your code using code tags. This makes it much easier to get good help.

Thank You
Ron

3

Try a low-pass filter before feeding it to the MOSFET. The cutoff frequency should be about an octave less than the PWM frequency.

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