5 posts tagged with Electrical Engineering.
TL;DR A comprehensive exploration of duality in mathematics and electrical engineering, covering reciprocal impedance duals, voltage-current parallel-series duals, and electric-magnetic capacitance-permeance duals, with detailed worked examples and magnetic circuit analysis. Duality is an approach that has been applied across countless disciplines where one takes an existing structure and transforms it into an equivalent structure, often with the intention of making it more useful for a particular context. In electronic circuits this usually means we take an existing circuit schematic and transform it in such a way that it serves a similar purpose but suited to our specific use case.
TL;DR Nodal Analysis turns every junction in a circuit into an equation. By insisting that the current entering a node equals the current leaving it, you can reduce an entire circuit to a system of simultaneous equations — solvable with basic linear algebra. Nodal Analysis is a technique for circuit analysis where each node (A point where two or more components are connected) is interpreted individually. This analysis can be used to determine the voltage, or any other variable, at any point in the circuit, sometimes as a function of time.
TL;DR A downloadable tutorial book covering frequency-domain circuit analysis by hand, with complete worked examples on common circuits. Originally intended to include time-domain analysis as well, but the time-domain section remains incomplete. Some time back I started writing a book in an attempt to help explain how to do circuit analysis by hand. Originally it was going to include both time-domain analysis as well as frequency-domain analysis. The book is incomplete and I never got to cover the time-domain but has several complete examples showing frequency-domain analysis on many common circuits.
TL;DR A detailed walkthrough of installing a Hustler BTV-6 multi-band vertical antenna on a city roof, including grounding, radial placement, feedline routing, and RF interference mitigation. For several years now I wanted to replace my older High Frequency antenna which had partially fallen down; it was a G5RV Jr. However it never really worked right; it used a metal mast which had detuned the antenna and after about a year it started to fall down and became completely inoperative anyway.