I have some copper enamel wire, winded up into something of a circle/ellipse, with about 20 turns, and the purpose for it is to give me a decent magnetic field (which it does) using a DC source. The magnetic field is picked up by a hall effect sensor on a nearby circuit, which is connected to some LEDs, which in turn light up when the field is detected. I'm stuck between 2 of Maxwell's equations which ought to describe my system: 1. Faraday's law of induction (only problem is that this describes a time-varying magnetic field, which can only come about from an AC source..right?) 2. Ampere-Maxwell law (or Ampere's circuital law. But this doesn't explain how the LED's are turned on..it just says an electric current will give me a magnetic field). I'm thinking 2 best describes my system? Yes I get a magnetic field, and that is picked up by the sensor...but isn't Faraday's law of induction specifically meant for wireless power, ie, turning on light bulbs and the likes? Thanks.