EEVblog #1284 - How Bad Product Design Kills The Environment
Let's save 30 cents/unit and stuff the environment! How can bad and cheap product design kill the environment by requiring vastly more energy generation, delivery and PF correction infrastructure? Dave looks at the shockingly energy wasteful design of mains powered smoke alarms.
Dave analyses Veritasium's video "The Big Misconception About Electricity" and how energy flows in the Poynting vector in the electromagnetic field OUTSIDE the wire instead of inside the wire.
https://www.youtube.com/watch?v=bHIhgxav9LY
00:00 - Veritasium's video "The Big Misconception About Electricity"
00:32 - Rection to the points in the video
01:11 - This is a bit MISLEADING!
02:28 - Electron drift
03:51 - Engineers use different tools and theorems
04:27 - Every electrical engineer knows this
05:17 - Everything he says is correct
08:24 - What is current?
09:30 - He doesn't address this in the video. Poynting vectors at DC
11:12 - How the lightbulb works
12:41 - At the physics level, it's correct
14:11 - My only problem with this is...
15:08 - Is it just an academic discussion?
16:17 - The undersea cable is just early transmission line theory
17:20 - So what is the answer to the question?
22:06 - What about skin effect and DC?
25:44 - Let's simulate this and answer the question
29:18 - Transient analysis
34:28 - The quantitative values don't matter
38:25 - But what about DC steady state?
40:24 - What does Richard Feynman think?
Forum: https://www.eevblog.com/forum/chat/veritasium-(yt)-the-big-misconception-about-electricity/
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#ElectronicsCreators #Veritasium #Electricity
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Dave tests to see if the chips in a 1960's Apollo LVDC Saturn V Launch Vehicle Digital Computer still work.
Fran Blanche:
https://www.youtube.com/user/ContourCorsets
http://www.frantone.com/designwritings/design_writings_LVDC.html
The Dinosaur Den
https://www.youtube.com/user/TheDinosaurDenShow
http://fran-n-bil.com/
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https://www.youtube.com/watch?v=U-3_2UtTMtA
Full tour around, under, and inside the world's most expensive DIY Boeing 747-400 full motion flight simulator under construction. With Rod Redwin from Simulator Solutions:
https://simulatorsolutions.com.au/
Forum: https://www.eevblog.com/forum/blog/eevblog-1268-diy-boeing-747-cockpit-simulator-full-tour/
#747 #FlightSimulator #DIY
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How do LED ceiling panel LED lights work?
Everything you need to know about LED ceiling panel lighting, with Doug Ford.
And a bonus tutorial on underwater LED lighting.
http://www.dfad.com.au
Two more parts to this LED lighting installation coming soon...
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Dave attended the Cebit 2014 event in Sydney at Homebush Olympic Park. Here are some highlights.
The EX¹ the worlds first PCB printer. It prints silver conductive ink onto FR4, paper, mylar, or many other types of substrate.
https://www.kickstarter.com/projects/cartesianco/the-ex1-rapid-3d-printing-of-circuit-boards
GoFar, a wireless car monitoring startup.
http://www.gofar.co/
The University of Newcastle Robotics group NuBots:
http://www.newcastle.edu.au/research-and-innovation/centre/engineering-built-environment/newcastle-robotics-laboratory
Showcasing the robots use in the RoboCup challenge.
Forum: http://www.eevblog.com/forum/blog/eevblog-614-cebit-2014-highlights-download/
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https://www.youtube.com/watch?v=RwAhluh7MUE
The live drawing of the giveaway for the Fluke CNX3000 Multimeters, Gossen Metrahit World Multimeter, and Chronovu Logic Analyser
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A time lapse installation video of Dave's 3kW home solar power system using LG MonoX panels.
How to install a home rooftop solar power system.
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