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Don MacArthur

Don MacArthur, The Practical Engineer, is a Guest Contributor to In Compliance Magazine. He has over 30 years of experience in product development, EMC, testing, and product safety compliance. He has developed products for military, commercial, and industrial applications.

From This Author

Practical Engineering: X1 vs X2 Capacitor Types and How to Select the Correct Type

This month's blog explains X-type capacitors, which suppress emissions in switch-mode power supplies and variable drives.

Product Insights: Amplifier Operational Classes and Other Important RF Amplifier Specifications

To avoid costly errors in selection, invest the time upfront to gain a basic yet thorough grasp of key amplifier specifications and operating principles before identifying the optimal model for your application needs.

Practical Engineering: The Importance of Reading

Making time for even just 30 minutes of focused reading each day will keep you on the path of continuous learning.

What Every Electronics Engineer Needs to Know About: Working with EMC Test Labs

Choosing an EMC test lab to work with is one of the most important decisions any electronics design engineer or product developer has to make.

Low-Frequency Magnetic Field Shielding

Occasionally, we are asked to help develop shielding effective for near-field low-frequency (LF) magnetic fields, perhaps in a situation where some regulatory agency has imposed limits on LF magnetic field emissions of our product, and we are forced to comply.
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Capacitor Technologies Used in Filtering

Although understanding each capacitor type and behavior is daunting and difficult to memorize, it is prudent that every aspiring engineer and technician involved in design for EMC at least have a rudimentary understanding of what capacitor technologies are available.

RF Absorption Loss of Shielding Materials

To determine a shielding material’s potential absorption loss capability, you must first know the frequency or frequencies of concern and, second, what shield materials you have available.

What Every Electronics Engineer Needs to Know About Oscilloscopes

From the entire pool of test equipment available at our disposal as electronics engineers and technicians, the most useful is undoubtedly the oscilloscope. 

Let’s Talk Oscilloscopes and Their Capabilities Beyond Basic Measurements

We leave the basics behind and explore more of the state-of-the-art advanced cool features, functionality and specifications that are available in today’s oscilloscopes.

No Spectrum Analyzer? No Problem – Use Python’s SciPy Module Instead

In this article, we describe a method for analyzing data using the FFT algorithm found in Python’s SciPy module. The reader should know that the SciPy module also includes methods for other FFT algorithms, such as the Inverse FFT and Discrete Sine and Cosine methods.
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