by CET Technology The intent of this write-up is to provide engineers with an understanding of how a few of their most useful equations are derived. Most engineers are familiar with Faraday’s Law of Induction and from this law some of their most important and well-used equations are created. The equations derived in this write-up […]
PSMA Semiconductor Committee expands offering to four APEC 2020 Industry Sessions
The Power Sources Manufacturers Association (PSMA) Semiconductor Committee is sponsoring a total of four Industry Sessions at APEC 2020 that address the rapid emergence of wide bandgap semiconductors as a significant power conversion technology. The sessions will take place on Tuesday, Wednesday and Thursday, March 17-19, 2020, in the New Orleans Convention Center. The series […]
Digital modulation basics, part 1
Mobile devices have evolved from basic analog phones to digitally enabled smartphones that fit in the palm of your hand. Voice communications are still part of the mix, but voice calls are handled by converting the voice signal from analog to digital and transmitting it digitally. This means that mobile wireless systems are focused on…
The therapeutic uses of RF energy
Discussions of the upcoming 5G technology sometimes focus on whether or not the millimeter-wave frequencies involved can damage human life. What gets less press is that radio frequency energy in other bands can be therapeutic. It can be useful to review a few of these uses to understand the beneficial role RF energy can play. […]
Thermal propagation triggering and mitigation in medium- and large-format battery modules
by Iris Su, Project Engineer II, Inventus Power A recent change in Li-ion battery pack safety is the shift from a focus on just prevention to one that emphasizes prevention and mitigation. Battery pack designers who were once focused on preventing thermal runaway (TR) are now taking increasing measures on preventing single cell failures within […]
Heat shrink tubing, Part 2: Extensions
Although we take it for granted, versatile and widely used heat shrink tubing is the result of advanced material science, and is available in a broad range of varieties and options. Part 1 of this FAQ looked at the basics of HST and its history. This part looks at the many variations and standard options […]
The basics of heat shrink tubing, Part 1
Although we take it for granted, versatile and widely used heat shrink tubing is the result of advanced material science, and is available in a broad range of varieties and options. Along with duct tape ad nylon cable ties, heat shrink tubing is an essential element in the engineer’s toolkit as well as manufacturing, production, […]
Testing transistors with a voltmeter
A bad transistor can sometimes be detected by its partly burned or distorted appearance, but more often there is no visible indication. One approach to troubleshooting is to substitute a known good component, but that is a costly way to go. Also, it is not reliable because an outside defective component can instantly destroy the […]
Gravity Probe B, Part 4: Brilliant Science, incredible engineering, but mediocre results: Disappointment and competition
An audacious and very costly orbiting science experiment set out to verify a subtlety of General Relativity by pushing the boundaries of science and engineering but ended with inconclusive and frustrating results. This is the final part of a four-part series on Gravity Probe B. What is the outcome and lessons of the GP-B experiment? […]
Gravity Probe B, Part 3: Brilliant science, incredible engineering, but mediocre results: Implementation
An audacious and very costly orbiting science experiment set out to verify a subtlety of General Relativity by pushing the boundaries of science and engineering but ended with inconclusive and frustrating results. Gravity Probe B was intended to measure the unmeasurable. Part 1 explored the principle, and Part 2 explored the plan of the experiment […]
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