Arduino PID Magnetic Levitation - Programming Questions - Arduino Forum

Hello, I have made a magnetic levitation device using an Arduino Nano, L298N, Neodymium Magnets and 4 of these coils. It uses 2 Hall effect sensors to determine the position of the floating magnet. In addition, an op amp is used to amplify the signal coming from the sensors, and to set the reference value. However, I'm facing some problems as well. The less annoying one is the coil whine that the PWM creates in the coils. I tried to change the PWM pins from 6 and 5 to 9 and 10, but that didn't

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