Hi there. I want to build a running LED circuit, but I want to replace the LED's with electromagnets (about 4 of them). I will use an Arduino Uno for this project, but I'm not sure how to proceed as the circuit would require protection from feedback etc. The only video's I can find uses 1 solenoid in combination with a mossfet. Any help would be much appreciated. I'm just an electronics enthusiast, so the simpler the better.