hef séð þetta svo oft áður á snúrum.. er þetta bara lóð eða?

Sjá einnig: http://en.wikipedia.org/wiki/Ferrite_beadA ferrite bead is a passive electric component used to suppress high frequency noise in electronic circuits. Ferrite beads employ the mechanism of high dissipation of high frequency currents in a ferrite to build high frequency noise suppression devices.