I have a robot with a lot of servos in close proximity and a high-current DC motor powering an airsoft gun. The motor is causing electromagnetic interference with the servos, and we need to shield it somehow. The problem is, we're at a competition, so we need something that can maybe be bought at a convenience store.
Can aluminum foil be used for EMF shielding, and if so, would more layers be better or worse? What else could we try to use?
Best Answer
To answer this question, yes, aluminum foil can be used as shielding. After all, many shielded cables use aluminum foil or aluminized mylar for exactly that purpose. However, aluminum oxidizes rather readily and its oxide is an insulator, so it can be difficult to maintain a good electrical connection to it. Screws with lockwashers can be effective.
However, in the comments on your previous question, we've pretty much ruled out EMI as the source of your problem anyway. You need to go back to that question if you want a quick solution.