Can PWM with 12VDC/5A create EMI?

Other Hardware Motors, Mechanics, Power and CNC
1

Hi there! Im planning to control a RGB strip using arduino and PWM. The strip is using 12VDC and 5A. My arduino will have 3 analog inputs from potentiometers to control the colors. Is is possible that the PSU, or the transistors im using, will create EMI and disturb the analog signal because of the PWM?

As you can see on the sketch I attached, im planning to place the Arduino and the PCB with the tranistors right next to the PSU.

RGB STRIP PLACEMENT.PNG
RGB STRIP PLACEMENT.PNG1018×839 11.1 KB

2

  1. Yes.

  2. It's not usually a problem.

  3. That PCB layout concept looks like a good one. The sensitive analog wires don't cross over any wires carrying high current.

3

Ok, thank you very much for good answer!

4

And you can add capacitors to ground on the analog inputs to low-pass filter out switching noise.