[HN Gopher] A Summary of Electronics
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A Summary of Electronics
Author : sharjeelsayed
Score : 191 points
Date : 2021-09-10 07:17 UTC (2 days ago)
(HTM) web link (electroagenda.com)
(TXT) w3m dump (electroagenda.com)
| torginus wrote:
| Hmm, while the website seems quite beautifully designed, the
| introduction is quite rudimentary. I don't think you'd be able to
| figure out how a circuit works just by reading this.
| crispyambulance wrote:
| It's perfectly fine. People have to start somewhere. That
| summary could be someone's ticket to getting started.
|
| Electronics is such a huge and overwhelming topic. Where is one
| supposed start? Maxwell's equations? Energy Band theory? Maybe
| for some, but differently prepared folks need different
| approaches for starting to learn something that is new to them.
| jowdones wrote:
| Electronics is a tremendously complex subject, akin to
| "mathematics". So just replace one with the other and you'd
| know what to expect: "a summary of mathematics". Ridiculous, to
| begin with.
| USOpenfinal21st wrote:
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| iammjm wrote:
| Thank's for making this. How can I export it as a single .pdf to
| read on my e-reader?
| electroagenda wrote:
| I will appreciate if you just redistribute the link instead. As
| you can see there is no ads in the webpage. But I intend to add
| them in the future. I won't get rich but at least I will pay
| the server!
| unnouinceput wrote:
| Links in MSWord, expanded on pages, then print to pdf. In 5
| minutes you'll have a pdf, even with included links if you
| want.
| metaphor wrote:
| If the author is lurking, SS 3.2.2.1 _Passive Components_ [1]
| table headers are listed in English; SS 3.2.2.2 _Active
| Components_ [2] are listed in Spanish.
|
| I'm clearly not the target audience here, but I'd be lying if
| there wasn't a sense of conceit in its objectivity...kind of like
| those World Book encyclopedia entries I'd read for hours at a
| time as a kid, becoming aware of the existence of something, but
| only enough to sow more questions than answers.
|
| [1] https://electroagenda.com/en/a-summary-of-
| electronics/analog...
|
| [2] https://electroagenda.com/en/a-summary-of-
| electronics/analog...
| [deleted]
| electroagenda wrote:
| Thank you for pointing out the mistake with the languages. I
| will solve it when I get some time.
| lnsru wrote:
| The Art of Electronics, by Paul Horowitz and Winfield Hill is the
| way to go. It's over 1000 pages and has an additional exercise
| book, but at the end one has some basic understanding what's
| really going on.
| 123pie123 wrote:
| a long time ago, I considerd that book to be the closest thing
| to bible I had
| GeorgeTirebiter wrote:
| I'd also suggest you get the 2nd edition. It had coverage of
| some circuits (I'm reminded of a particularly clean
| 2-transistor 'stiff' current source) that are not subsequently
| covered in the 3rd edition.)
|
| ALSO: if you do buy the 3rd edition, if you are _really_ into
| this stuff, be SURE to consider buying "AoE - the X Chapters"
| which is amazing detail on various corners of EE. There is a
| particularly beautiful explanation of how to control motors
| with PWM, why variable resistors to control speed works but not
| well, and some rules-of-thumb learned. And much more.
|
| And finally, if you are Truly Serious (of course you are!)
| about learning this stuff: Get "Learning AoE" and buy the
| components they recommend and do the experiments.
|
| No excuses! Do it! ;-)
| crispyambulance wrote:
| AoE is an outstanding text, I learned a lot from it, but it's
| not for everyone. It's optimal, IMHO, for STEM undergrads
| coming from outside of EE. For EE's it's too broad and shallow
| of a survey, for casual hobbyists just starting out it's too
| technical.
| cushychicken wrote:
| Analog Devices also has a big, free, really high quality
| electronics course on their wiki.
| bloopernova wrote:
| Which I think starts here, in case anyone was too lazy to
| search for it :)
|
| https://wiki.analog.com/university/courses/electronics/text/.
| ..
| hsbauauvhabzb wrote:
| This is cool, I'll use this when I get back to studying
| electronics.
|
| the next and previous page shouldn't open in new tabs though :)
| nmeta wrote:
| To add to this, on iOS I couldn't get the cookie pop up to
| clear so after the first 3 sections I had to move on. The
| writing was indeed great but navigation and screen real estate
| for mobile made this a bit tough.
| Causality1 wrote:
| Yes, there are small usability quibbles. The fully-justified
| text on narrow phone screens often produces ridiculously
| spaced-out words.
| creamytaco wrote:
| Terrible website structure, forces you to click and load new
| pages for every concept, no download option, no see "all in one
| page" option. Lots of screen area waste.
| hsbauauvhabzb wrote:
| Have you made any public contributions we can critique?
| creamytaco wrote:
| Entirely irrelevant, empty deflection, to the points I made.
| yissp wrote:
| I think your criticism would have been better received if
| you hadn't phrased it so harshly (e.g. "terrible website
| structure").
| houssem_fat wrote:
| Nice work. Need a a little more work on the website.
| tomxor wrote:
| The website is fine, it's simple, legible, responsive,
| lightweight and does not distract from the content...
| dom96 wrote:
| It seems like these guides never include the most useful info:
| safety. Does anyone know guides that talk about electronics
| safety?
| sva_ wrote:
| The YouTube channel ElectroBOOM comes to mind:
| https://www.youtube.com/channel/UCJ0-OtVpF0wOKEqT2Z1HEtA
|
| He always does the exact thing you're not supposed to do.
| Cocktail wrote:
| User or component safety? I think in general electronics do not
| require much in the way of user safety (Ofcourse I exclude
| power electronics and other high-energy systems) beyond how to
| properly use measurement devices. Component safety, eg: the art
| of not killing your semiconductors is another beast entirely
| tzs wrote:
| Even low power components can do things that could hurt you
| if you do something wrong with them.
|
| When I was first playing around with electronics as a kid
| using kits and individual components purchased from Radio
| Shack I once put an LED directly across the terminals of a
| lantern battery.
|
| The LED exploded sending little bits of plastic flying off at
| high speed. They all missed me, but if I had been in a little
| different position when hooking up that LED my lesson in the
| importance of using current limiting resistors with LEDs
| could have been punctuated by a serious eye injury.
|
| I'd say that a paragraph when each component is introduced
| covering what bad things that component can do if you exceed
| its voltage, current, or power limits would be a good idea
| even if the course is only dealing with low power systems.
| mrob wrote:
| From Wikipedia's "Electrolytic capacitor" article:
|
| "Applying a reverse polarity voltage, or a voltage exceeding
| the maximum rated working voltage of as little as 1 or 1.5
| volts, can destroy the dielectric and thus the capacitor. The
| failure of electrolytic capacitors can be hazardous,
| resulting in an explosion or fire."
|
| Even a small one could take somebody's eye out if they
| happened to be close to it when it failed and not wearing eye
| protection.
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| rofrol wrote:
| wtf?
| GuB-42 wrote:
| I am curious too. It is all reddit links full of sports-
| related nonsense.
|
| It is not the usual spam. No product link, shady website,
| obvious scam or political message. Just nonsense.
| dotancohen wrote:
| Very, very nice. Right from the beginning:
|
| > At a fundamental level, electronics is the branch of physics in
| charge of controlling the flow of charged particles, typically
| electrons. In practice, electronic engineering uses the highest
| level manifestations of said flow of charge to provide solutions
| to problems or needs.
|
| I absolutely love reading text that state what we already feel
| intuitively and present it as an eloquent statement of fact.
| TheOtherHobbes wrote:
| "...branch of physics in charge of... charge"?
|
| I'm not sure who or what the site is for. If you need a one-
| para explanation of what you can do with electronics - it
| doesn't really provide that, because it doesn't provide product
| examples.
|
| If you want a usable introduction to circuit theory - it
| doesn't provide that either. (Explaining what a transistor does
| is "beyond the scope of this text"? OK.)
|
| If you want to know how a modern phone works (which is
| literally _all_ of EE except power electronics in a small
| portable device) - there 's nothing about RF, comms theory and
| encoding, error correction, and so on.
|
| So what exactly is this supposed to teach readers?
|
| It looks suspiciously like what's sometimes called Cargo Cult
| writing - the reproduction of ideas from other texts without
| fundamental insight into the topic or reader needs.
|
| The main point seems to be to promote the author(s) as an
| authority, but unfortunately if you want to be authoritative it
| takes a bit more insight and effort than this. (See also -
| Horowitz and Hill, for example.)
| gumby wrote:
| As another poster put it: it's an introductory overview just
| to give the reader a quick perspective on what I the topic is
| about, like an encyclopedia description.
|
| I would expect a 12 year old to get something out of it, or
| an author who knew no physics but wanted to put a bit of
| electronics into their mystery novel.
|
| There is an important place for overviews such as this.
| andrepd wrote:
| I too love conciseness in scientific texts.
|
| Were it 90% of tutorials or blog posts nowadays and it would
| take 5 or 10x as much space to say the same thing, detours and
| forced jokes and analogies included, in the process making it
| less understandable.
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(page generated 2021-09-12 23:02 UTC)