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Comparison of USB Chargers (Apple, Samsung, Counterfeit)

This blog post is a few years old, but remains very interesting to see the difference in performance among USB wall chargers. Ever wonder about the difference between the expensive name-brand charger and the cheap imitation? This article gives in depth examination of the noise emanating from these devices. An interesting side effect of unwanted electrical noise from the chargers is that the touch-screen on your device can become unresponsive or erratic in some cases.

Author
Ken Shirriff

The EMC Blog

Arturo Mediano is a professor at University of Zaragoza (Spain) and founder of The HF-Magic LabĀ®, a specialized laboratory for design, diagnostic, troubleshooting, and training in the EMI/EMC/SI and RF fields. He is also an instructor for Besser Associates (CA, USA) offering public and on site courses in EMI/EMC/SI/RF subjects.

Author
Arturo Mediano

EMC Page on Williamson Labs Site

Background information on electromagnetic compatibility (EMC).

As practiced by many: designing for, and understanding EMC has been, and remains an ART more than a Science. However, it needn't be that way; using what you have learned in the proceeding pages, this page will attempt to remove some of the mystery from this subject--but NOT all!

Author
Glen A. Williamson