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zakruti.com » Knowledge, science, education » The Engineering Mindset
Edison’s Missed Billion Dollar Idea

Edison’s Missed Billion Dollar Idea

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Rating: 4.0; Vote: 1
How Edison's abandoned discovery started electronics To learn for free on Brilliant Brilliant’s also given our viewers 20% off an annual Premium subscription, which gives you unlimited daily access to everything on Brilliant. Discover how Thomas Edison’s forgotten discovery sparked the creation of the vacuum diode, triode, and ultimately the transistor, the foundation of all modern electronics and the computer age. In this video, we explore the evolution of diodes, semiconductors, LEDs, rectifiers, and the atomic science behind PN junctions, showing how a simple effect inside a light bulb transformed into a multi-trillion-dollar industry. If you want to understand electronics, radio, silicon, germanium diodes, Zener diodes, Schottky diodes, LED technology, and the origins of modern computing, this is the perfect deep-dive. Watch ad-free here: Become channel member: Get your engineers mug here: Timestamps 0: 00 Edison’s forgotten patent 0: 22 Strange effect in the glass 3: 34 Vacuum diode 3: 59 The triode 4: 59 Crystal detectors & first semiconductor 5: 58 Germanium diodes 6: 54 Silicon diodes and PN junctions 7: 27 Diode stripe, symbol & identifying polarity 8: 04 Diode as circuit protection 8: 54 AC to DC with diodes 9: 49 Main diode types 9: 54 Voltage drop and heating 10: 54 Zener diodes 11: 34 Schottky diodes 12: 10 Atoms, energy and semiconductors 14: 03 PN junction and photon emission 14: 55 LEDs, photodiodes & solar cells 15: 14 Bell Labs Images: Zone refining at Bell Labs (1954) Public domain, via Wikimedia Commons. Source: Original source: Radio and Television News, May 1954 TOOLS YOU NEED Get this electronics book Professional Multimeter - Good multimeter - Professional clamp meter Good Clamp meter Outlet tester - Energy monitoring plug Battery tester - Basic electronics kit MY FAVOURITE GEAR My camera - My Microphone - My Keyboard - My monitor - My headphones - SOCIALISE WITH US FACEBOOK: TWITTER: INSTAGRAM: WEBSITE: Http: //TheEngineeringMindset. com
Date: 2025-12-13

Comments and reviews: 19


Gave off negativity charged particles
There's only one electric charge!
Benjamin Franklin explained it perfectly which baffles me to no avail as to why people still think that there's a positive and negative charge!
Mr Franklin said that the electric charge is a problem of accounting, when you have more of it, you are in credit and we shall call the account positive, when you have less than then the account is negative.
It's just one electric charge and it's going to be either positive or negative in relation to something else.
Think of the consequences that will occur when two different and opposite charges come together.
This misunderstanding opened the door to some pretty wacky scientific ideas. Like anti particles and anti matter and anti gravity and so on. There's no anti anything! Even antifreeze can freeze.
There's a documentary featuring Dr Jim Al Khalili where he paraphrased Benjamin Franklin and then proceeded to repeat it in his own words and totally messed it up. He's a Dr and should know better but that's what he was taught, which prevents him from seeing what really is instead of what some other misunderstood person thought it was.
High state of charge is attracted to a low state of charge, high state of temperature is attracted to low state of temperature and so on. The poor to the rich. You get the picture. Or you can go with the poor to the anti poor.
Opposite charges are just one being at a higher state of charge while the other is at a lower state of charge, both are made of the same thing.

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10: 50 it was blue! Because blue color has a lot of frequency. Overall, in LEDs, light is created by applying voltage to the P-N junction. If you use the right materials, electrons will move from one side to another with specific energy, and release this energy as light. Blue requires a big gap to jump, because it requires more energy to escape from a moving electron to be formed, unlike green LED and red LED. Scientists didn't know which material to use, which would have the gapz but also could be turned into a P-N junction. But one Japanese scientist who worked in an LED company who was struggling financially was an absolute legend who had pulled it off. He got access to a machine which was used to make P-N junctions and experiment with trying to create blue LEDs, but he could only replicate it, not use it. He did learn how it was build, he made it, and he used a brute force approach to make a P-N junction. The son of the company he had worked for screwed him up and disrespected him, the father, previous owner was cool, but he went on to make a company training new scientists and ultraviolet LEDs
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Diodes should be marked by the electrons flow, NOT by antiquated convention. I live in the USA, and I STILL don't know why we won't Dump the SAE measuring system. I mean, it would only take a few years to accept the Much Simpler standard of measurements.
How many inches makes a foot Simple, 12.
But. How many inches makes a Mile
4280 feet in a mile, and How many inches in a mile, what
Yeah, That. And this is coming from a dude who Lives in the USA.
How many centimeters are in a kilometer
Let's see, 100 centimeters are in a meter, and a thousand meters make a kilometer.
equals, You Suck. The Power of Ten makes Math So Much Easier than anything else that SAE has to offer.

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I kept blowing up my bicycle headlight bulb, it was powered by a wheel mounted generator If I went too fast down hill, the generator will over voltage the bulb. So I added a zener diode to limit the voltage to the bulb, no more blown bulbs! Those bulbs were expensive halogen types! Of course now days the bulbs are LED and run off batteries for a long time, but back when I had the blown bulb issues, there were no white LEDs. Them bright halogen bulbs I had used a lot of power, batteries would not last long, hence the generator to run them.
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Edison was an uneducated, a thief of ideas from young scientists. He was self-educated; some coursework at Cooper Union. How can someone who is unable to understand Ohm's law and Kirkhoh's laws, someone who doesn't know how to take a pen and calculate the current in an electrical circuit, who doesn't know that Volts Ampere = Watts understand thermoemission. He even stole the invention of the light bulb from Swan. A lot from Tesla. The thief who invented the first think-tank in the world.
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You skipped over mercury arc rectifier (1902-1990s, thyratron (1920s-1990s) and selenium diodes (1933-1960s) that were all fairly common.
And gas regulator tubes and neon bulbs act like zener diodes.
Also no mention of SCR's and TRIAC's (unless that's the next episode)
I think the most interesting types are ->
High power mercury arc rectifiers are just crazy to see operating, steam punk overload.
And tunnel diodes just defy logic with the negative resistance region.

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The diode colors shown on the chart at 14: 50 are partially reversed, they follow the spectrum. the longest wavelength is red, the next one shown should be Yellow, and then green, and then blue, with white actually being a secondary emission of broad spectrum light when Ultraviolet emitted by the basic junction, hits the phosphorus. There are many formulations for the junction materials, and different profiles of the frequencies emitted.
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Hi paul im an engineering student (general degree but more mech biased) whos looking to learn electronics and build real projects.
I was looking at arduinos to control motors but there's so many options. Its so overwhelming.
Got any advice
PS: advice on raspberry pi or similar to control the entire system would be appreciated but not necessary.
Thanks in advance

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The people who first pioneered and continue to expand our knowledge of electronic engineering are some very clever people. For example, inventing vacuum tubes, then doing a similar job with a much smaller semiconductor transistors to then printing millions onto silicone wafers! Imagine where science and technology will be in 100 years time
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During WWII they actually experimented with silicon diodes first but they sucked, burning out at only a few volts. They switched to germanium at the time because it was easier to refine and dope. Once they improved silicon refining and doping they could go back to using silicon though germanium stayed around for RF stuff for awhile.
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Blue was so hard to make that it earned a Nobel prize (2014) to the 3 invetors, the reason being that the required material, gallium indium nitride, was hard to make in good quality without crystal defects. They achieved that high quality in the late 80s the first blue LEDs went on sale in 1993 I think
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Your videos are a condensed synopsis of years of schooling.
I’m a tradesman, and teach years of experience in a few months.
A diode and a check valve are almost identical on a blueprint (symbolically.
Thx for understanding and sharing your wealth of knowledge.

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10: 50 it's blue because Derek from Veritasium said so kidding, it's blue cause they couldn't find the right semiconductor, I think One guy finally cracked the answer after years of not being taken seriously. I find it a wonderful story.
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Photo, laser, and avalanche diodes all interest me, and it'd be great if you did a video on one of them (or all of them, but it's not a big deal, cause I'm about to go on a Wikipedia dive anyways
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It wasn't it ignored, At that stage he had no need for it that only came later Is to him just a very interesting property but he couldn't see the commercial applications of his discovery.
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Edison was like Bill Gates. He stole ideas from Tesla and patented them to make money out of it. Who invented the electric light Nikola Tesla! Why are we taught in school it was Thomas Edison
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The only thing Edison ever discovered was how to patent other people's ideas and how to maximise his profits from others. Rather like Elon Musk.
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sir make a video for three phase circuit delta and Wy equation for volt and current i need your video not other chenals plase
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When I grew up, we had an old car battery charger that used a tube like this. Worked forever the transformer was what eventually failed.
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