May
22

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bundled conductors

Understanding skin effect

Ohm’s law states that E = I X R — volts (electromagnetic force) is equal to amps (intensity) times ohms (resistance). When the equation is used together with…

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May
22

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The standard model of particle physics

Isaac Newton’s classical view of light (consisting of very small material bodies) appeared to lose validity following Thomas Young’s double-slit experiments. These convincing demonstrations in the first decade…

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May
15

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double slit block diagram

Thomas Young and the double-slit experiment

Isaac Newton propounded in his great work Opticks (1704) that light consists of a flow of particles. Generations of students and researchers have accepted this idea. Light was…

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May
14

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example EM wave

Basics of light polarization

Black body radiation, originally described by Gustav Kirchhoff in 1860, consists of light and other electromagnetic radiation that is emitted by a material object that is not reflective….

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May
14

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molecular switch example

Basics of molecular-scale electronics

In the race to achieve higher speed computation, conventional lithography-based Very Large-Scale Integration (VLSI) is bumping up against a brick wall that threatens to disrupt Moore’s Law which…

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waveguide featured

Basics of waveguides

Monday, March 23, 2015

There is something almost comical about a waveguide – the notion that electromagnetic signals or usable power could pass through a hollow pipe and that techniques appropriate to…

oliver heaviside

Oliver Heaviside and Maxwell’s equations

Friday, March 6, 2015

Oliver Heaviside’s life, spanning the years 1850 to 1925, began and ended in squalid surroundings. He was never entirely free of the dark melancholy that characterized his private…

keithley handbook

Answer this 5-question quiz, win a measurement handbook

Thursday, March 5, 2015

What’s your test IQ? Answer this five-question quiz and be entered to win one of 20 Low Level Measurement Handbooks graciously donated to us by Keithley Instruments, a…

VFD simple schematic

Variable Frequency Drives: Viewing the DC Bus

Thursday, September 25, 2014

By David Herres In the field of motion control it’s often necessary to vary the speed of an electric motor and even reverse its direction of rotation. When…