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Visual Electric
United Kingdom
Registrace 8. 04. 2019
Videos on electrical engineering, electronics, programming and power systems engineering.
Understand concepts the Visual Electric way.
Understand concepts the Visual Electric way.
The Story of the Telegrapher's Equations - from diffusion to a wave #wave #diffusion #heaviside
in 1876, Oliver Heaviside did something remarkable.
Watch the full video: czcams.com/video/wyS2aNIKxmQ/video.html
Watch the full video: czcams.com/video/wyS2aNIKxmQ/video.html
zhlédnutí: 1 930
Video
The Story of the Telegrapher's Equations - from diffusion to a wave.
zhlédnutí 110KPřed 2 měsíci
Out of nowhere, a 26 year old derived the Telegrapher's Equations for the first time. His name was Oliver Heaviside. In 1876, "On the Extra Current", Heaviside introduced the new ideas of Maxwell's dynamic theory of electromagnetism to unlock to a new mode of propagation which went beyond the conventional diffusion model - a wave. This is the story of how the Telegrapher's Equations came to be....
Why does Capacitive Current Lead the Voltage in AC circuits?🔌💡 #reactivepower #capacitance #leading
zhlédnutí 1,4KPřed 8 měsíci
#capacitance #reactive power #leading This video explains why capacitive current leads the voltage by 90 degrees in AC electrical circuits. For more detail, go to the full video: czcams.com/video/AmHy1bZ_i5M/video.html
AC Power: Basic Principles - Real, Reactive and Apparent Power - what do they REALLY mean?
zhlédnutí 6KPřed 8 měsíci
This video is a simple explanation of Power in AC systems. Why are there 3 different types of power? We use an intuitive approach to try to understand what Real, Reactive and Apparent power actually are. We first look at their fundamental mechanisms in isolation - first for real power, then for reactive power. After this, we define Power Factor. With this intuition, it is easier to understand t...
How does GPS work? 📡🛰️ 😬 Navigation and Timing explained.
zhlédnutí 4,5KPřed 9 měsíci
The Global Positioning System (GPS) - and other Global Navigation Satellite systems (GNSS) provide time and location anywhere on the planet with unprecedented accuracy. But how do they work? It's actually quite simple! This video will explore the core principles behind GPS and go on to explain why the technology is more vulnerable than most people realise.
How NASA Plan to Bring GPS to the Moon
zhlédnutí 2,5KPřed 11 měsíci
An audacious mission to bring GPS to the moon using Earth's own navigational satellites.
Nyquist - the amazing 1928 BREAKTHROUGH which showed every communication channel has a capacity
zhlédnutí 128KPřed rokem
In 1928, Harry Nyquist published a paper which would change the course of history [1]. But his original contribution was not the sampling theorem. Inspired by the work of Fourier, Nyquist discovered that there is a maximum rate at which signals could be sent through a bandlimited channel. For a bandwidth of B, 2B signals per second is the limit (the capacity). This, of course, does not set the ...
Real and Reactive Power - what do they actually mean? #reactivepower
zhlédnutí 12KPřed rokem
Power systems are characterised as a mix real and reactive power, but these phenomena can be linked to distinct physical mechanisms of energy transfer. Power is just the rate of energy transfer. In a power system, energy is transferred between the source and circuit. In real power, it is one way - from source to circuit. In reactive power, energy is transferred back and forth between source and...
Phasors - what are they and why are they so important in power system analysis?
zhlédnutí 21KPřed rokem
What are phasors and why are they they the default system for expressing voltage and current in power system analysis? Phasor notation was proposed in 1893 by Charles Proteus Steinmetz, and were rapidly adopted in AC circuit theory. Phasors hugely simplify the analysis of power systems, in particular through the use of the impedance triangle and Ohms law. In this video, we will use a visual app...
How the First Transatlantic Submarine Cable in 1858 led to Transmission Line Theory as we know it
zhlédnutí 100KPřed rokem
The key to understanding modern transmission line theory is to first understand its history. This is the story of how the first Transatlantic Telegraph Cable in 1858 led to the birth of Transmission Line Theory. Professor William Thomson (later Lord Kelvin) was the genius who developed the initial breakthrough that led to the first accurate model of a long cable. Although it would be left to Ol...
Overcurrent Protection in Electrical Substations: the simple genius of the Relay
zhlédnutí 83KPřed 2 lety
Although digital relays have replaced their older electromechanical counterparts, the terminology and theory of operation remains the same. In fact, to properly understand digital relays, a good working knowledge of the physical principles underpinning the electromechanical relay is required. This video is a simple introduction to how overcurrent protection works in electrical substations, with...
DC Motors - how do they work? COMPREHENSIVE guide to brushed DC motors
zhlédnutí 11KPřed 2 lety
This animated video explains the basic principles underpinning the operation and control of the Brushed DC motor. We start with an easy to understand mental model rooted in fundamental physics (the Lorentz Force and the Left Hand Rule), then progress to a basic model of the DC motor (incorporating back EMF) and how they can be controlled using modern chopper circuits. I focus on 4 types of DC m...
How LoRa Modulation really works - long range communication using chirps
zhlédnutí 224KPřed 2 lety
LoRa (LoRaWAN) is a new modulation technique optimised for long range, low power, low bitrate communication. You'll often hear people say LoRa uses "Chirp Spread Spectrum', but this alone is only a small part of the story. LoRa uses an elegant mathematical trick to allow more efficient receivers. In this video, I outline how LoRa modulation works - it is incredibly unique. I was amazed how LoRa...
NCOs are everywhere - here's how to make one using an FPGA
zhlédnutí 11KPřed 3 lety
Numerically Controlled Oscillators (NCOs) give FPGA designers an easy, flexible and efficient way to generate sinusoidal signals of arbitrary frequency. In this video, we show how an NCO works, how to design one for a particular output frequency. We then do a demonstration using Quartus, Verilog, the Cyclone V starter kit and a 14-bit DAC.
The best way to start learning Verilog
zhlédnutí 107KPřed 3 lety
My new channel dedicated to FPGAs: www.youtube.com/@visualfpga-gw7dh/featured There aren't that many fundamental concepts in Verilog Hardware Description Language, but the few there are, we need to know WELL. This video explores some of these fundamental concepts. We look at Combinational Versus Sequential logic and explore the 3 modelling styles in Verilog; Gate Level, Dataflow and Behavioral.
Is Gate level design same a Structural design in Verilog ?
Excellent job
Excellent explanation. Thank you.
Wow wow wow! , I am a total beginner to verilog and this video helped so much for my lab exam due in a few days. Thank you!
Excellent presentation! Thank you!
I studied him in my Elec Engineering degree. He worked out the properties of the cable that provided for distortionless propagation, making long distance telegraphy realistic. He didn't patent it or earn the millions he could have. The manufacturers derived much from his work. He also created the Heaviside operator, the equivalent of the Laplace Transform, but with more clunky symbology. I just think it so cool that he seems also to have had something to do with creating Wolverine's look.
Why is there a fucking censorship blob in the lower left-hand corner of the screen?
I put the wrong year for the date of the first transatlantic cable
You can get waves out of diffusive structures, paradoxically. Zabusky, N. J., Hardin, R. H.: Phase transition, stability and oscillations for an autocatalytic, single, first-order reaction in a membrane. Phys. Rev. Letters 31, 812 (1973)
I had a little difficulty understanding the math which means I need to study more math. I do have a couple of questions about the chirp. I am assuming that the positive slope represents a frequency that is starting at a low frequency and ends at a higher frequency. How does the size of the symbol affect the waveform? Does the bit size of the symbol change the slope and the amount of frequency change? What is meant by discontinuity? How does modulo fit into the explanation? What does a negative slope mean? Thank you for your video.
Thank you for this video. It was beautifully presented, and absolutely fascinating.
very nice. i remember the epiphany or realizing the essential part of fourier's trick, "EVERY signal is a repeating signal, even if you have to wait till infinity."
6:47 that’s the problem of following the money instead of the science
I feel dumb by not understanding math. I want to explore, but constantly bump into fancy equations. That is where my journey ends.
If dc motors say 12 and 24v can they be wired for 110?
Just started a substation relay technology program. What should I expect in the workforce?
This stuff is so far over my head. Its more amazing than any other field, from vehicles to buildings. It's crazy how differently God made us, how, for some people, this comes naturally and they're super intrigued by it. I tip my non existent hat to all of you gentlemen that keep our lives lit up, cool and warm. 💙💙
what software for this animation?
Thank you so much and kudos to you for making this marvelous video!
thanks for your awesome explanation for this project . my i ask for your personal email to contact you? i have few questions and i would love to know .
According to this video, do you realize how many FIRST EVERs Heaviside DID? • he was the first guy to "coin" the word *inductance.* (👈So, why were units of inductance _not_ named after Heaviside?) • he was the first guy to "set up" what is now called (in books that teach the topic of Differential Equations) *a forcing equation.* (👈This is where you put a sum of 3 voltage terms on the left side of the '=' sign (i.e. one to represent voltage that results from R, and one to represent voltage that results from L, and one to represent voltage that results from C) and you put *an input signal* voltage on the right side of the '=' sign. Differential Equations textbooks refer to the applied *input signal* as a *forcing equation.* )
Very good video!!!
Thank you for your tutorial, am learning.
Well-Done
I arrived here from the epic story of the first transatlantic telegram cable. Fantastic summary.
Shannon is so underappreciated.
Thank you
the work of Maxwell is at its base the work of Faraday ... he was first he pointed the way
That's great but left waiting for the show to drop - like what/how did OH solve the problem? You left that for the next video, I can. hope. Nonetheless, great video - and learned a lot! Thanks!!
Blown away by the quality of the video and animation. Thank you so much for explaining these topics!
does this apply to Earth as well?
Heaviside seems a very underrated genius
Only seems??
I think he was underappreciated because he did great work on so many different problems that no one knew he was working on things they never connected because it was outside of their purview.
thank you!
Heaviside is and looks like a chad
Thanks a lot, where can I find the verilog and the project code you mentioned. I could not find it. Huge fan BDW
Cool stuff, its like reading the lore of smart hooman, jk good vibes sent ❤️
What a great Video. Maybe do Shanon and the Comunication basics. This guy brought Communication to the modern world
Thanks!
I don't have any background in this subject, but I want to know why, at the data flow level, he used `((~X & A) & A) | (X & B)` and not `(~X & A) | (X & B)`.
Also the Green of Green's Function which is used everywhere from PDEs to Quantum Mechanics to N Body Physics was also discovered by an autodidact
A pity that the writer confuses phenomenon and phenomena.
Excellemt!
Please learn to pronounce Fourier correctly.
I have been long time to browse such best explanation of Lora to understand, thanks for great lecture
Very nice. Thank you!
14:16 R, C, and L are per unit length.
well give us the result. How were those equations used to optimise the peeformance of the transatlantic telegraph line.
One simply adds a parallel inductance.
Fantastic presentation about some truly special people.
An interesting property of Fourier's heat equation is that a small disturbance is propagated instantaneously to all distances , effectively traveling faster than the speed of light. The addition of inductance resulting in the telegrapher equation (which is a wave equation) nicely resolves this problem.
The cover of Paul Nahin's book on Oliver Heaviside is shown at 7:56 of the video. Nahin in 2020 wrote a book on the topic explored in this video. The title is 'Hot (from the Mathematics of Heat) Molecules, (to the Development of the) Cold (Trans-Atlantic Telegraph Cable) Electrons. It is a story book with plenty of Fourier mathematics. Nahin also has a separate book, Transients for Electrical Engineers (2019), emphasizing the Laplace Transform solution for partial differential equations. The last part of the book is about the solution of the Telegrapher Equation and how programs like Matlab can make life easy for the modern analyst. It also explains why the Laplace Transform replaced Heaviside's earlier operator method of solution. It took 10 years but by the 1950's engineers started using Laplace Transforms exclusively. If you love math and stories you are in for a treat from all 3 books.
It should be noted that no one named shaniqua, rastus or anything like it, are in the history of human development of technology.