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/electronics/ - Electronics Engineering

It's kinda tingly!


Winner of the 2∞rd Attention-Hungry Games
/liberty/ - Physical removal time, communist swine.

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Dead, but still a corpse.

File: 6403c089b032dce⋯.jpeg (125.88 KB, 640x480, 4:3, UnderNewManagement.jpeg)


As in the title, there is a new BO, and that would be me. I'm assuming this board will stay at a snail's pace with not much going on, but I'll be here.

I'll set this thread up as a meta thread and and a place for banner suggestions. If you have suggestions or concerns, let me know.

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How have I not seen this for two weeks? Thanks, man, it includes pretty good stuff.

File: 1424371828119.jpg (33.07 KB, 180x259, 180:259, The_Art_of_Electronics.jpg)


This is the thread where students, hobbyists and experienced engineers can share literature, knowledge and advice to become better engineers, learn new skills and share ideas.

Sorry i hijacked your
"Is Horowitz and Hill's the Art of Electronics a good first text? Are there any other free resources?" thread anon, it just had some really good replies.
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If you can't find it on the genesis library you're probably gonna have to buy it.

File: fe3686e4a44eb66⋯.jpg (15.41 KB, 622x143, 622:143, goodMeme.jpg)


What's some /electronics/ approved reading material pertaining to circuitry and low-level systems?


File: dd7823d81ae979d⋯.pdf (5.73 MB, Starting Electronics, Thir….pdf)

File: 83a3e3731a85aa7⋯.pdf (2.83 MB, Engineer's_Mini_Notebook,_….pdf)

I haven't really looked thoroughly through these books, but if I recall, they looked nice enough. The first few things you want to understand are things like current, voltage, resistance and ohm's law. V=IR. Build simple resistor circuits and understand how they work,then slowly add fun things like variable resistors, LEDs (diodes), capacitors, and simple chips like the 555, and logic gates.



The 7400 series are good starting chips, and can be found cheaply.

File: 9a3b187cfaeb021⋯.jpg (37.73 KB, 957x529, 957:529, mpweld.jpg)


How strong pulse I need to generate in order to fry someones electronics in pointed direction? I got the schematic, not that degenerate jewtube emps.

I'm talking serious stuff here, like back of the van.


To do it in a pointed direction you would most likely need a specialized microwave generator like a vircator.

Otherwise the electromagnetic radiation of sufficient force to work over a range to damage electronics would be penetrating in every direction unless inside a faraday cage in which case it wouldn't penetrate the cage itself.

Also electronics shielded by faraday cages would be unaffected.

All of that said, you would need a lot of power to fire the device. Electromagnetic pulses can occur when a big power transformer blows but those again affect all directions from the transformer. Most professional devices produce explosions to create a strong enough effect.

You might need a megawatt or more for the pulse for it to be effective. You could maybe use some kilowatts or less but then you might have to be really close to the target.

There's a good discussion of this in the comments on this page; https://hackaday.com/2016/10/12/become-very-unpopular-very-fast-with-this-diy-emp-generator/

File: 1445789767246.webm (4.09 MB, 480x360, 4:3, Diy-xray-crazy.webm)


I've seen this implemented on other boards and chans with a slow post rate and I thought it would be a good idea to do it here as well.

In this thread you are encouraged to post anything you want, pictures, webms, un/finished projects, questions, stories, opinions… it doesn't matters what, as long as it is remotely related to the board.

The objective is to increase the post rate to get users to come back regularly not only to check their posts, but also other users' posts, hopefully participating in other threads more often, creating a chain reaction and thus kickstarting the community, since the current post rate must be around 3-5 posts per week.

If you see this thread you must post in it.

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File: 333155e27abb1fa⋯.jpg (204.57 KB, 850x1145, 170:229, 1414795133241.jpg)

Well, this is dead. See you on halfchan's /diy/, /diy/scord (https://discord.gg/x8uSvA), r/electronics and maybe even in freenode's IRC channel ##electronics.



Link expired. New Link:



File: a753a511e0d413f⋯.webm (5.37 MB, 1280x720, 16:9, discord.webm)


Dump the discord. Use Riot if you can't live without fancy shit, at least it won't sell everything you ever posted.


File: 4688245dfcdbcc4⋯.png (133.69 KB, 740x952, 185:238, 4688245dfcdbcc43e92898d0dc….png)

Dice rollRolled 52 (1d100)



Whoops, meant to reply to


File: 1424352542634.jpg (340.72 KB, 1600x919, 1600:919, usb-fpga-2.13-1600.jpg)


Everything FPGA's. Post your favorite FPGA, discuss HDL languages, dev boards, projects and everything else FPGA.
16 posts and 3 image replies omitted. Click reply to view.


I have an old spartan 3 starter kit on which I learnt VHDL.

I feel quite confident now so I treated myself to a Zedboard.


Doing something FPGA based for my 4th year project.

Any ideas?

Was contemplating porting DOOM to an FPGA but I don't know



That's beautiful, i should print it out and frame it.

On the same note as >>106, do you think there will ever be FPGAs with open bitstreams? Seeing as the reverse engineering of the iCE40 hasn't lead to an instant revolution and everyone jumping on board I'm skeptical.

But it would be nice, maybe for small devices or something. The GreenPAKs almost already qualify, but they're so small to be almost useless.



the easiest FPGA to learn on yourself is the Embedded Micro Mojo


–it only costs $80 US***

–it has english specs and tutorials on the EM web site

–the IDE for it is a free download on the EM web site

–most importantly–it is made to be easy to use, with an on-board co-processor to help with programming and a simplified IDE


there is official xilinx and altera boards on their sites, that cost $100-$500+

and there is cheap Chinese boards with xilinx and altera FPGAs on them

of the chinese boards–none of them have any documentation in english, and you have to know chinese to even hunt for it online

so the most popular chinese FPGA boards is the simplest ones, that only have the FPGA chip

the generic china ones with all the displays and buttons and LEDs and I/O ports *work*,,,, but they have no documentation, and there's dozens of variants

for a non-chinese newbie, attempting to get them to work is very likely to end in disappointment

***also we note: there is china clones of the Mojo for $40; they look the same but I dunno if they work the same


normal hobbyist people building normal hobby stuff wouldn't ever "need" an FPGA

the easiest example of something an FPGA is used for is machine vision systems.

you could do the same processes in software on a regular processor, but an FPGA can run them a lot faster


File: c509836e12f2f0d⋯.jpg (55.04 KB, 393x540, 131:180, eti.jpg)


The content is from publications over 40 years old, but that means nothing…



File: 25a4b4ec6b8f54a⋯.jpg (105.84 KB, 513x718, 513:718, 001.jpg)


File: b61ee4028e5a8ac⋯.gif (195.17 KB, 742x1080, 371:540, k3602.gif)


File: e201e9e71c91545⋯.gif (252.96 KB, 729x1080, 27:40, k7204.gif)


Something I hope to do is get a public archive happening of these kit instructions from the old Dick Smiths Electronics company…


File: 984f16cedeb4c54⋯.jpg (403.35 KB, 819x1080, 91:120, eti198612.jpg)

The scanning quality in this is a bit lacking…

The December 1986 issue of (Australian) ETI. About the most significant thing in this issue was the start of The Last Great Kit Computer Project we ever saw here, the Applix 1616.



File: 9c0f23649e3622c⋯.jpg (101.97 KB, 479x644, 479:644, eti198011.jpg)


A few interesting things in this– it mentions 'solid' (Lithium) battery research, has a ZX80 advertisement (and heaps of other ancient computers!), and more Dick Smith Electronics ads than you can shake your.. dick at.


I have a neighbor that dumps trash outside my front door and I need tips on if there are any key hole camera with high dpi and that can pick up audio which I can fit into the fish eye in my front door.



try www.google.com

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Where do I start? All I have mathematically is aa2 and I am self taught in C. What path should I take so I can start assembling TTL chips :). PIC not related.


Nobody uses TTL, it's been replaced by CMOS. If you just want to start assembling basic logic circuits, you can probably just read something on how logic gates work, assemble a few circuits from tutorials, and then start designing your own circuits.


>What path should I take so I can start assembling TTL chips :)

If you really want to do this, get copies of the old Forest M Mims books, Engineer's Notebook and similar titles. There is value in playing with those chips still, there are still applications for them and sure they aren't cutting edge anymore but you learn how things work, using them like building blocks, hands on, things you can put a meter on and understand it. Learn about logic gates and how they're assembled from transistors, learn how NAND gates can be assembled into almost anything logical (XORs are nice too). Learn about level shifters to interface 5v and 3.3v logic, and 5v to +12v / -12v for RS-232. Learn how gates build simple adders and counters, and how simple adders and counters build CPUs. At some point you're probably going to want to jump from putting TTL chips on breadboards to building things with gates on FPGA's and you can actually freaking build your own CPU out of a programmable chip. (You can do it with TTL too, but in this day and age only do that if you are a true autist). Grab an Arduino and play with it… then learn to use Atmel or PICs without the hand-holding of the IDE. Learn 8 and 16 bit assembly. And pick up something about the mechanical aspect of "how things work", too. Because what good is a microcontroller that can't click a solenoid to unlock a door or spin a stepper motor with a screw-drive to move a cutting tool on a lathe. Take some shit apart… learn how it works… repurpose it to do what you want. Watch some vids on youtube of what poo-in-the-loos do in their spare time… those kids play with this stuff and build things and become engineers, like American kids did in the past. I recommend "how to build a" as a search phrase to get you started.


So, I've got some questions about audio in general, and hope you goys can help me:

What is in general the difference between an AUX jack and some other audio jacks?

See my parents got a new dvdplayer, and the old one has some good speakers, but they have some weirds ass jacks.

Is there any way to tinker around with this to be able to plug it into my pc?

Will provide pics if this thread is actually in the right place.


File: 1af128e4cd4a824⋯.jpg (50.42 KB, 350x304, 175:152, Types-of-cables.jpg)

>What is in general the difference between an AUX jack and some other audio jacks?

I don't know much about this, but I assume the differences are only physical, since they all have left channel, right channel and ground. With RCA you need two wires, usually white and red, one for right and the other for left, and the outer crown is ground.

>and the old one has some good speakers, but they have some weirds ass jacks.

You can't plug speakers directly into your PC without an amplifier.


At the moment, I am trying to verify my idea for a development kit. It allows you to prototype on a breadboard without wires. Tell me what you think.


File: c3d393680739ab1⋯.jpg (118.94 KB, 1000x749, 1000:749, Antigravity World.jpg)


1950s Top Secret Propulsion Documents Declassified Douglas Aircraft



File: bb85945f5a16f0e⋯.jpg (108.87 KB, 780x408, 65:34, Plane Crash.jpg)

Neat stuff from the 1950's, makes you wonder what they have nowadays on the cutting edge research going on in secret military and government labs on antigravitational propulsion!!!


I have a broken microvave oven in garage. It is broken because door closing thing is not registering doors being closed, so i got it for free. What can i use it for besides cooking??

All the electronics inside are fine. They do kind of smell of popcorn.



Probably a dead microwsitch, it could be easily fixed.

If you want to disassemble it you can get the transformer and the magnetron's magnets, not much worthy of salvaging in there.

Check projects with microwave transformers and remember to discharge the caps when opening, also, don't smash the magnetron, the ceramic beryllium insulators (often pink) are carcinogenic.



that's too safe, if I had another microwave id totally attach the magnetron to a wave guide, 1000~ watts of directed microwaves, bby. sadly I blew up my last magnetron so that project will have to wait. ;-;



If you're willing to modify the transformer, you can turn it into a spot welder. If you wire it all back together and put a wave guide on the magnetron, then you can do cool stuff like turning on light bulbs from ~15 feet away. If you know how to do it right, you can charge the supercapacitor with enough juice to hurt like hell, but not kill someone. Wire it up to a glove or something and you're a walking taser.

I'd also like to hear some cool ideas if anyone has any. >>269

File: 1445128813810.jpg (16.62 KB, 480x360, 4:3, hqdefault.jpg)



>2,000 Farads in a credit card



File: 1445224263873.webm (506.67 KB, 480x360, 4:3, a_man_can_dream.webm)

According to the video it has a capacity of 500mAh, not bad at all for a capacitor of that size and shape, but still can't compete with lithium batteries in therms or energy density (maybe it could in terms of energy per kg though), the only thing it makes them so good is they could be charged in seconds or minutes and have a much longer lifespan than the lithium batteries.

Everytime I'm hyped for something like this it turns to be a hoax, let's just hope…


I'll take it with a grain of salt after seeing one of his websites https://sites.google.com/site/aferlab/


He seems to have built a motorcycle with a homemade graphene supercapacitor.




Does anyone know why all of this man's videos are taken down?

File: ad3b7506e99c466⋯.png (198.73 KB, 500x313, 500:313, brittany.png)


Not sure if this is the right board for this but it seems most fitting. I've dreaming about my dreamhome for years now: a reasonably secluded plot of woodland in which I can build a homestead upon. I don't plan on being completely self-sufficient, but I'd like to provide a good chunk of my own power at the least.I'm ok with the possibility of connecting to mainline power at some point as I expand and build more on the land, but I'd like a backup supply and ideally enough to power a small "base camp" while I build the main house which could hopefully be then routed to that structure.. The problem is I know fuckall about how power in particular elecricity actually works So I'm not sure to where to begin. Car Batteries would be enough for light at least in the initial shelter and camp but I'm not sure how to power larger more energy intensive devices like a computer, appliances, ect. Basically I'd like to match as much power as I could if I was hooked to the grid. A battery bank could work I guess but it seems like a hassle for that amount of power and daily use. Same problem with a generator. Wind, water, and solar could all be viable depending on the site.

side subject I have no idea how the internet would work. I at least would need it at the main house. What are ways of expanding wifi range?

Pic like 90% unrelated


File: 84db3ab20a2178c⋯.png (2.78 MB, 1173x4609, 1173:4609, 1466563390526.png)

I would suggest you buy lots of batteries and solar cells, and an inverter and charger rated for the job, that's what I did when I used to have a house in the middle of nowhere, solar cells and batteries with an inverter, a gas fridge and cooking stove, no wi-fi though, you might get away with a powerful wifi antenna.

Infographic related, it's for a van, but you get the idea.

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