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 […]
Gravity Probe B, Part 2: Brilliant science, incredible engineering, but mediocre results: The plan
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. This part explores the plan of the experiment and […]
How to select PPTC resettable current-limiting fuses
Circuit protection is a wise choice for anything subject to surges such as over-current, short circuits, dirty power, and overloads. Most of us have already seen a fuse since they can be found in cars, appliances, and thermostats. But did you know that there are current-limiting fuses in your smartphone, smartwatch, ebook readers, laptop, and […]
Gravity Probe B, Part 1: Brilliant science, incredible engineering, but mediocre results: The principle
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. On April 20, 2004, a Boeing Delta II rocket launched from Vandenberg Air Force Base carried Gravity Probe B into orbit and so […]
Plastic fiber shows promise for carrying mmWave signals
Santa Clara, Calif. — While millimeter wave (mmWave) signals are part of 5G’s wireless infrastructure for carrying high-bandwidth data, it’s not the only use. At DesignCon 2020, Joy Laskar, CEO of Maja Systems, presented a paper where he explained how a surface-mount mmWave antenna can launch signals into inexpensive plastic fibers for data transmissions from…
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