When my brother told me he was using a breadboard i tought he wanted to be a baker. Guess he ain't baking no bread, only circuits.

Just met my two friend dev and jay after a long time. After some initial random conversation.

Dev: What is your job profile?

Jay (excitedly): I design electronic circuits and write some low-level programs for them.

D: So you are a low-level programmer?

J: Yeah.

D: My cousin is also a programmer. But, I think he is smarter than you.

J (confused and thinking that he must be a good programmer): Oh great! It would be nice to meet him. But, why do you think he is smarter?

D: Although still in school, he is a high-level programmer.

J: -_-"

Me in the digital circuits class: "Bro I just got a pick up line in mind!"
Friend: "Go on.."
Me: "Girl, are you a boolean signal 1? 'Cause you turn me on 😏"
Friend: "I can't believe I'm your friend."

The most useful circuit evarr.......

TL;DR: a good friend recently finished building an electric car from scratch with a team and I bought him a C++ devDuck as a congratulations gift!

one of my best friends recently presented at my colleges capstone rollout, and his teams project was to literally BUILD AN ELECTRIC CAR FROM SCRATCH. all the circuits and everything, designed from scratch, and nobody else on the team was very good at software, so he pretty much wrote the software himself. I just ordered him a C++ devDuck as a congratulations gift!

a U.S. company that places an order for 100,000 integrated circuits with a Japanese manufacturer. Part of the specification was the defect rate: one chip in 10,000. A few weeks later the order arrived: one large box containing thousands of ICs, and a small one containing just ten. Attached to the small box was a label that read: "These are the faulty ones."

TL;DR: check polarity before plugging your DIY circuits into others!!!

*goes off to watch some Lucky Star and drink some booze*
*notices phone battery dying after 3rd pint*

But my charging cable that Huawei delivered with this thing is way too short... Well that ain't no problem, I can make one of my own 😎

But I'm tipsy.. sound I really enter the workbench in this state?

*goes off to build a charging cable anyway*
But what was USB-A male connector's polarity again? Oh, there's the fan's USB connector that I've made in the past. Let's check on that one. So, left is positive and right is negative?

*solders the wires on*
Snip, strip, stick, done! Well that was easy. I guess that all those failed soldering attempts and lost pads in the past as a means of training did pay off in the end!

*plugs phone into Raspberry Pi media center through new charging cable*

Strange sounds coming from the speakers.. well that's odd. Reverse polarity or maybe the Pi can't handle a 1A load from my phone?

*plugs phone into the 5V 5A charging hub that I've made earlier*
That oughta do.. current limits should be no more in that thing.

*charging hub makes high-pitch noise similar to the Pi speakers*
Definitely a reverse polarity, isn't it :') let's check on the Gargler...
Oh shit! It is a reverse polarity mistake!!! Should've checked this earlier >_<

*resolders wires properly*
Alright, finally done.. as I'm writing this post, my phone's charging from the Raspberry Pi through my fixed charging cable now...

Lesson learned. Always check on the internet what the pinout is before soldering anything, don't solder while tipsy, and be fucking grateful that this phone has reverse polarity protection in it.

Nexus 6P with all its shortcomings regarding power delivery and battery management, luckily it's got reverse voltage protection features built-in. Otherwise it might've costed me my phone. Always double-check before plugging anything into something else!!!

To the left, a conventional circuit board design done by a human. To the right, a design done by TopoR, a software that designs circuits automatically.

It looks absolutely alien, yet beautiful. It doesn't care about how it looks, it doesn't care about angles and alignment. It only cares about efficiency and designs every connection to be as short as possible. It can even account for electric interference.

Humans just cannot compete.

RANT TIME!

Sorry guys, I know this is devRant and probably not a place to post this but am fucking burning with fury and fatigue! I should probably develop elecRant and post it there instead.

I FUCKING HATE POWER ELECTRONICS!!

I am in my final year of electrical engineering and I can fucking say with confidence that power electronics is the most fucked up unit I have seen in my life. A whole load of useless math from simple RLC circuits just to make students' lives miserable. For those who might not know, power electronics is some unit that involves use of solid state electronics(transistors, diodes etc) for power applications(switching mostly). Basically things like inverters and converters. UPS systems are an example of their applications.
Now don't be fooled by how that sounds cool and so smart, this shit is fucked up. These circuits in the attached picture might just seem like simple RLC networks with some BJTs, but they are devils in their own right. They fucking need some advanced unnecessary calculus and Fourier analysis to even calculate the simplest output current!! Worst still, some of these motherfuckers have more than 1 mode of operation,needing one to analyze some fucking 100+ waveforms. I fucking hate this shiit! I hate it!
You might say that i am just being lazy and don't want to study. Let me tell you something, FUCK YOU TOO!!

Something that really grinds my circuits:

When programmers talk about making their own language but they know nothing about programming language theory.

What most people think of designing a language is actually just replacing keywords.

Has anyone here ever used tinkercad.com? (for simulating Arduino setups, or other circuits)

Where can I find community content for circuits? They make it so easy for their 3D models.. But not for their circuits..

Also, can someone tutor me in the basics of circuits over telegram?

(for those of you whom have never heard of it, I attached an image ^~^)

When I saw the U-Boot prompt on the console of a system that we'd developed from scratch all from openly available documentation. When the board was fabricated and brought in for software bring up, it was basically less useful than a brick. It felt awesome giving life to it. We had to configure it and calibrate it. It's extra challenging when you have a lot of analog circuits. Yeah so we didn't win 'against' anyone but that victory stands for itself.

Im so frustrated with myself . I've always been afraid of being stupid . Perhaps it was because i was always called the "less intelligent" sibling by my parents . Well i did self-learn java , c++ and android (when i was 15) and made some apps and i did get acknowledged finally but i may have not acknowledged myself . I got into college a couple years ago and i can tell you right out that its like an island filled with stupidity. The teachers , the students. The other day i caught my teacher learning how a transistor works. This is unacceptable for someone who is teaching us advanced op-amps and other circuits . Well , I did get into this college cause it was less tedious and i thought college doesn't matter cause i can self-learn . All i needed was free time . Well college totally destroyed that too and provided no facilities in the process as well . So yeah should i blame my college for my inability to do things the past couple years. I mean i don't think i've learnt a single thing all this while. This is where my frustration begins cause i dont want to blame the college , it's not going to help me and i'll probably end up in a 9 to 5 call center job at this rate . Im also very heavily frustrated with myself , it's like everything i've done so far has been a path of least effort. I have tried a few things which were all just fads like machine learning and crypto and even trading . They felt good and thats what scares me , maybe i don't have the passion and am just looking for a quick buck . This is clearly reflected in the ideas i've been having as well . Well i've never had access to proper funds but now im just trying to justify this layman emotion . I just want to learn and be passionate about learning , researching and i just want enough funds for that . But im afraid , maybe its just that i want to feel superior than my circle . I mean i still don't know why i tried learning rust and wasted even more time setting up fedora and everything around it while i already had a working debian setup and a programming language i'm kind of versed with . i wouldn't say well cause im a self learner and i feel guilty for that . I definitely know i just learnt the surface of the language . Deep down i'm just another stupid fad obsessed guy who feels better by choosing a more complex language that my colleagues look upto . Is this what i am , if so im scared and i don't know what to do . People say that you are what you are and you cant change that . If i cant change this then i dont deserve this wasteful stupid life . I don't know what i should do and it makes me cry . Maybe acknowledging this would've helped but it hasn't , I've felt better playing fortnite rather than learning some basic electronics. Im another one of those aren't I ?

Been tinkering with circuits all afternoon, and then i made the mistake of eating some pastry right off of my table. Pretty sure i ingested like half a roll of solder lmao.

From Sarah Connor Chronicles, 2008: "They used to think that 12 nanometer scale was impossible. The circuits are so tiny, you're all but in the quantum realm. It's the most sophisticated processor on earth. If you could take your memories, your consciousness, everything that makes you a person, turn it into pure data, and download it onto a machine, that chip could run it."

I'm watching the DVD on a quadcore Ryzen APU that is built in 12nm, and it was already outdated when I bought it last year. I guess I better download myself to my laptop because that's a 7nm Ryzen.

TL;DR don't fiddle around with batteries if you aren't ABSOLUTELY sure what you are doing

For my arduino project I need to use 18650 Li-Ion batteries. They are pretty awesome but at the same time pretty dangerous if you don't use them the right way. You need protection boards etc. or they can/will go BOOM.

So I am looking around Amazon to find some good quality ones and reading some reviews made me wanna cry.

People were REMOVING protection circuits from the batteries and even removing the foil around the batteries. NEVER EVER FUCKING DO THAT!

I also found out that these are the batteries used in E-Cigarettes and now I really don't wonder anymore why they explode so often. People fuck around with the batteries just so they fit into their vapes, or reduce the resistance of the coil (the thing to heat up the liquid) to an absolute minimum so they can get more watts. A side effect of this is that a lot of current gets drawn from the batteries (>20A or something) which makes them go BOOM if no protection/fuses are used in the circuit.

Yesterday I did some experiments with my lab bench power supply to see if everything was working as it should, and whether my newly acquired laptop (old business laptop from 2004) would still power up. Noticed that it did, and left the thing charging for a while - its battery was completely drained. But after letting it sit for a few hours, one of my switches wouldn't turn off anymore.

The lab bench power supply has a 250V 2.5A (625W) rated switch on the AC side, connected to a 50V 10A (500W) AC-DC power supply. The DC side of that is then connected to 2 DPS5005 units, of which one was driving 50W of power into the laptop.

The experiment went reasonably well, the AC-DC power supply was loud but stayed cool like a cucumber. The switch however wouldn't turn off anymore after a few hours. Today I've desoldered that and put on a new one, and did a failure analysis. Turns out that it was a rocker switch (so there's a little nub in there that moves a piece of metal back and forth) and that the contacts of the switch (the piece of metal and the inside of the connector piece) were welded together.

However, the only thing that I know of that causes this welding is when loads are switched off, and an arc is generated. This wasn't the case here - it was just kept on for a couple of hours, with (accounting for power losses across the circuits) 80W going through it at most. I never expected that to cause a weld. Any clue as to why this happened? It really boggles my mind, and I don't want the switch that's currently in there to face the same fate.

I'm a teacher myself (for basic Html/css/js and sql 101) and there's nothing like the feeling of seeing your pupils progress. Makes me warm inside everytime :3

As a student though, i remember a friend of mine used minecraft and redstone for a logic circuits course. The teacher, which i guess wanted to show himself, was like "Yeaaah right redstone, i was doing that 20 years ago ...". How to loose credibility 101

So I work on Embedded System. While working on my project I was drinking water from bottle.

And kept it near my laptop.

Just there all my circuits were open. Connected via USB with my laptop.
And while working I tried grab the bottle and guess what?
Yeah, It fell. But thankfully it didn't touch any of my circuits. If it did!!!!

I was frozen on spot.
Phew!!

I can agree to shit when presented with hardcore data, data that proves me otherwise. But when people go by opinions and then hold is a truth because of "many feel the same way" I cannot help but to giggle a bit.

Most issues I have found with programming stacks come from opinions rather than hard presented data, if a bunch of people dislike a tool, but it delivers, I get to differ two things: (1) it is bad but it performs as needed, but it is bad because of design problems etc, (2) some dude made a post concerning why he things is bad and sheep mentality follows.

If technologies were without merit, then we would have all discarded C++ a long time ago cuz Linus disliked it, a powerful programmer indeed, but a FOCUSED one, meaning, one that deals with 1 domain (kernel development)

Do I care about what Linus things about web development? No, lol, he is a better kernel developer than I am, but I highly, grossly doubt that he knows enough about web development to give me something to think about.

all languages have faults, regardless of what point of view we look at them, but completely disregarding a tech stack because of shit that you saw some fucktard wrote about, benefits and otherwise, just seems....well...sheepish, there might very well be a tech stack out there that covers everything, to me it is a mixture of things, and I use them as I please and feel like, but this is because after years of learning I have read about quirks and pitfalls and how to avoid them. I would suggest you all do the same, by you all I mean those of high opinions that can't be deflected.

This field is far too wide and concentrated to go head and think about absolutes when even the fundamental mathematical theory concerning computer science is not absolute whatsoever, it is akin to magic, shit works, but it might not, the incantation might be right, but circuits and electricity have a way of telling us to go fuck ourselves, so do architectures, specifically ones based on physics.

I wanted to create a microcontroller website. It would feature simple circuits and microcontroller code to build things. The intent was to show absolute beginner concepts to people. Since I am older than the whipper snappers out there I thought I would have concept of some old man running the website.

I found cartoon artwork featuring an old man and I also got the domain oldmanmicro.com. I then created a bunch of pages featuring some really basic circuits. I setup an affiliate program with amazon to provide kits to people and embedded those into the website. This site was going to take a lot of creativity. I struggled with what to put on the site. This was going to take time. At this point I felt pretty good with my progress. It looked nice, the links were good, etc.

Then I did web search for oldmanmicro. I found my website in top hits. I also found something else... The 3rd or fourth hit down was some fucking old dude with a micro penis website. WTF! The worst possible combination of letters in my domain name produce this terrible experience. I was already struggling with content ideas, and this just demoralized my efforts. Thus ended the tale of the oldmanmicro.com. Perhaps the micro penis guy bought it, I don't know. I am afraid to look.

This was my very ignorant adventure with not researching a domain name thoroughly.

This will definitely trigger many but the truth regardless of how you feel is the greatest programmers are those who understand both the hardware level and software .. only then are you more than a dev or programmer.. you are an engineer...

I challenge the devs who dis believe to go out and learn to build circuits, write optimized, efficient bare metal code.: no sdk.. no api... no drivers ..remove the unneeded abstraction layers that have blinded you...build it yourself, expand your potential and understanding..

Not only will you become more valuable overall, but you will write better code as you are more conscious of performance and space and physics of the physical layer.

I’m not talking about Arduino or raspie

Those who stand strong that high level abstraction languages and use of third party apis is a sufficient sustainable platform of development are blind to reality.. the more people who only know those levels, the less people pushing the industry of the low level.., which is the foundation of everything in the industry.. without that low level software the high level abstractions and systems cannot run

Why did we have huge technology advancements from 70s to early 2000s.... because more people in our industry understood the hardware layer..: wrote the software at the less abstracted layers..

Yeah it takes longer todo things at that low level abstraction.. but good robust products that change the world and industry don’t take a few week or months to build.....

Take this with what you will... I’m just trying to open the eyes of the blind developers to the true nature and reality of our industry

:3 I'm soooo happy right now! My friend asked me to help her get started in designing circuits and making her own PCBs. Great motivation for me to write a few articles on it 😊... Honestly I would have just asked her to marry me right on the spot if she wasn't a lesbian and didn't have a girlfriend already.

...maan, it bugs me a lot: super cute, same interests, really really intelligent and knowledgeable, great character... Why must everyone care about gender? :( (I don't - just for the context...)

Hey, fellow dRs.
I may need some help regarding this circuit.

It is about an 8 Bit multifunctional shift register with a 2 Bit instruction set.

These work:
If "Sel" is 0x00, the circuit loads data into its 8 D flip flops.
If "Sel" is 0x03, the circuit replaces all data with 0s.

These don't work (they do, but they do it in a very strange way and end up filling 1s instead):
If "Sel" is 0x01, it is supposed to ringshift bitwise to the right.
If "Sel" is 0x02, it is supposed to ringshift to the left.

As mentioned above. They do it in a very strange way. If we have 10000000, it will shift to the left or right depending on the "Sel"'s binary value. Let us say we want to shift it right. The output will turn from 10000000 to 01000000 (which is what we want), BUT after that it adds another 1 to it: 01100000. It keeps doing it until every single Bit is a 1. Same thing happens with the left ringshift.

I will include the other circuits used in this circuit in the comment section.

It is the time for the proper long personal rant.

Im a fresh student, i started few months ago and the life is going as predicted: badly or even worse...
Before the university i had similar problems but i had them under control (i was able to cope with them and with some dose of "luck" i graduated from high school and managed to get into uni). I thought by leaving the town and starting over i would change myself and give myself a boost to keep going. But things turned out as expected. Currently i waste time everyday playing pc games or if im too stressed to play, i watch yt videos. Few years ago i thought i was addicted, im not. It might be a effect of something greater. I have plans, for countess inventions, projects, personal, for university and others and ALL of them are frozen, stopped, non existant. No motivation. I had few moments when i was motivated but it was short, hours or only minutes. Long term goals dont give me any motivation. They give as much short lived joy, happines as goals in games and other things... (no substance abuse problems, dont worry). I just dont see point of my projects anymore. Im sure that my projects are the only thing that will give me experience and teach me something but... i passed the magic barrier of univercity, all my projects are becoming less and less impressive... TV and other sources show people, briliant people, students, even children that were more succesful than me

if they are better than me why do i even bother? companies care more for them, especialy the prestigious ones, they have all the fame, money, funding, help, gear without question!
of course they hardworked for ther positions, they could had better beggining or worse but only hard work matters right?

As i said. None of my work matters, i worked hard for my whole life, studing, crafting, understanding: programming, multiple launguages, enviorements, proper and most effcient algorithms, electronic circuits, mechanical contraptions. I have knowlege about nearly every machine and i would be able to create nearly everything with just access to those tools and few days worth of practice. (im sort of omnibus, know everything) But because had lived in a small town i didnt have any chances of getting the right equpment. All of my electronical projects are crap. Mechanical projects are made out of scrap. Even when i was in high school, nobody was impressed or if they were they couldnt help me.
Now im at university. My projects are stagnant, mostly because of my mental problems. Even my lifestyle took a big hit. I neglect a lot of things i shouldnt. Of course greg, you should go out with friends! You cant dedicate 100% of your life to science!
I fucking tried. All of them are busy or there are other things that prevent that... So no friends for me. I even tried doing something togheter! Nope, same reasons or in most cases they dont even do anything...
Science clubs? Mostly formal, nobody has time, tools are limited unless you designed you thing before... (i want to learn!, i dont have time to design!), and in addition to that i have to make a recrutment project... => lack of motivation to do shit.

The biggest obstacle is money. Parts require money, you can make your parts but tools are money too. I have enough to live in decent apartment and cook decently as well but not enough to buy shit for projects. (some of them require a lot or knowlege... and nobody is willing to give me the second thing). Ok i found a decent job oppurtunity. C# corporation, very nice location, perfect for me because i have a lot of time, not only i can practice but i can earn for stuff. I have a CV or resume just waiting for my friend to give me the email (long story, we have been to that corp because they had open days and only he has the email to the guy, just a easier way)
But there are issiues with it as well so it is not that easy.

If nobody have noticed im dedicated to the science. Basicly 100% scientist that want to make a world a better place.

I messaged a uni specialist so i hope he will be able to help me.
For long time i have thought that i was normal, parent were neglecting my mental health and i had some situations that didnt have good infuence on me as well. I might have some issiues with my brain as well, 96% of aspargers symptoms match, with other links included. I dont want to say i have it but it is a exciuse for a test. In addition to that i cant CANT stop thinking, i even tried not thinking for few minutes, nope i had to think about something everytime. On top of that my biological timer is flipped. I go to sleep at 5 am and wake up at 5pm (when i dont have lectures).
I prefer working at night, at that time my brain at least works normaly but i dont want to disrupt roommates...
And at the day my brain starts the usual, depression, lack of motivation, other bullshit thing.

I might add something later, that is all for now.

Hey guys
I think I just burned 2 Nanos.
I'm using a 30W soldering Iron and had to resolder the pins of one and solder the pins of a new one.
Now they don't work. One allows for code upload but won't turn on, other seams to have a short circuit.
Could have I burned the circuits due to a 30W soldering iron?
Also used a little of flux on the pins, can flux pass energy and make bridges?
Thanks

TIL how time-delay relays are used in circuits with a hell lot of power. For example to power and control the motor of a machine that lifts 20 people up to the sky and back to ground again.
FYI this is a simple circuit. We will hopefully start experimenting with SPS/Speicherprogrammierbare Steuerung (Programmable Logic Controllers). I cannot wait to make use of our predesigned circuits with complex logic gates with the new unit we will get to know.
Unfortunately, we will do practical networking (testing cables for the signal strength and speed, building a network of telephones and call each other - guess this is going to be the funniest part lol, etc.) before the SPS and LOGO software phase.

Btw. I am doing an all-nighter rn and repeating everything we did in our recent signal calculation lesson. We have another exam tomorrow.

Ohhhhhh shit, this is a good topic.

Well, I just expected more... Better.

Like maybe the programming lecture could have been Java 1.6 rather than 1.2, and taught rather than read from an archaic time of dusty powerpoints.

Maybe we could have used Spice or a reputable circuit modelling tool rather than CircuitMaker; a tool no longer being maintained that barely makes it past install because it was written in a time before circuits.

Maybe day fucking one of the first year, happy clappy, let's teach you HTML lecture the tutor could have just shown us a copy-pasted hello world. Rather than the ugly, mixed-case, no-end-tag-having, broke ass HTML 4 scribble she felt the need to go over every detail of.

Question from curiosity:

Does anyone know of interesting things to try on unused electronics, like phones or game consoles? Does Anyone have any stories of such or something? Software and hardware wise?

Okay, it's getting a bit annoying to _hear_ my graphics hardware (NOT the fans. The circuits) working when I'm doing something on the screen.. Sometimes it feels like it's gonna snap and burst in flames or smth..

Background:
I graduated high school from a technical school. And my teacher asked me to come in a few times a week and assist (which I LOVE doing)

So they’re working with circuits and raspberry pi’s and when I can in they pointed out that there was a project they couldn’t get to work. So I had to look at it. Now I was not given the original it was one a student tried to copy in (like they were supposed to) but it was awful. All the indentation was even more off than the original and on top of that. The original and what I was given wouldn’t give an error code.. and so I had no idea what was happening so I just decided to try to fix the indentation and take out stuff that didn’t look right (what else was I supposed to do when I didn’t know where to start?) and while I was doing it another student started to try to fix it and it legit barely took 5 minutes and now my spirit and confidence is broken. I wasn’t petty I observed the result and congratulated him cause he deserved it. After I took the code and put it on my laptop and figured out it was an “inconsistent use of tabs and spaces” error which is fucking stupid and I’ve never seen that in python before so after I debugged that there wasn’t really anything left to debug. So I guess I somewhat redeemed myself but I still feel like shit

Best co-worker is my elder brother, he is electronics & communication engineer. Working on robotics project is too much fun. He handle the haredware i.e electronic circuits design in PCB where as programming work is left for me.

Even circuits can be cross coupled, and yet you are single.

I have always been interested in computers. when I was in second grade, I decided I was no good at electronic circuits, and decided I wanted to program instead. My dad told be to check out free basic, and I immediately downloaded FBIDE, and followed tutorial videos on YouTube. once I finished the videos, I started to write mad libs programs. I made various types of calculators, etc. and loved it, so later I learned a bit of VB. I messed with that a bit, but didn't like it too much, and started web developing. The moment I saw some JS code, it was like an instinctive second language to me. I learned js and started making some ugly, but cool interactive web pages. When computercraft came out for minecraft, I learned lua and got a deeper understanding of programming. Now, I am using node to build a personal-use IoT server and currently making a drone flight program using a raspberry pi

I want to rant about my college.
I studied computer engineering, we spent 5 years studying circuits, diodes, CPUs etc ..
It's cool and all but like in my country we don't have a single computer's manufacturing company and all computer engineering students work in software development. But they didn't teach us a single usfel thing for work! We only studied Java and C++, nothing more and our professors claim that you guys can learn software development from the internet.
Our professors whom they don't even know how to debug a code not to mention how to full screen a power point presentation.
My point is college is trash.

Can anyone help me with this theory about microprocessor, cpu and computers in general?

( I used to love programming when during school days when it was just basic searching/sorting and oop. Even in college , when it advanced to language details , compilers and data structures, i was fine. But subjects like coa and microprocessors, which kind of explains the working of hardware behind the brain that is a computer is so difficult to understand for me 😭😭😭)

How a computer works? All i knew was that when a bulb gets connected to a battery via wires, some metal inside it starts glowing and we see light. No magics involved till now.

Then came the von Neumann architecture which says a computer consists of 4 things : i/o devices, system bus ,memory and cpu. I/0 and memory interact with system bus, which is controlled by cpu . Thus cpu controls everything and that's how computer works.

Wait, what?
Let's take an easy example of calc. i pressed 1+2= on keyboard, it showed me '1+2=' and then '3'. How the hell that hapenned ?

Then some video told me this : every key in your keyboard is connected to a multiplexer which gives a special "code" to the processer regarding the key press.
The "control unit" of cpu commands the ram to store every character until '=' is pressed (which is a kind of interrupt telling the cpu to start processing) . RAM is simply a bunch of storage circuits (which can store some 1s) along with another bunch of circuits which can retrieve these data.

Up till now, the control unit knows that memory has (for eg):
Value 1 stored as 0001 at some address 34A
Value + stored as 11001101 at some address 34B
Value 2 stored as 0010 at some Address 23B

On recieving code for '=' press, the "control unit" commands the "alu" unit of cpu to fectch data from memory , understand it and calculate the result(i e the "fetch, decode and execute" cycle)

Alu fetches the "codes" from the memory, which translates to ADD 34A,23B i.e add the data stored at addresses 34a , 23b. The alu retrieves values present at given addresses, passes them through its adder circuit and puts the result at some new address 21H.

The control unit then fetches this result from new address and via, system busses, sends this new value to display's memory loaded at some memory port 4044.
The display picks it up and instantly shows it.

My problems:
1. Is this all correct? Does this only happens?

2. Please expand this more.
How is this system bus, alu, cpu , working?
What are the registers, accumulators , flip flops in the memory?
What are the machine cycles?
What are instructions cycles , opcodes, instruction codes ?
Where does assembly language comes in?
How does cpu manipulates memory?
This data bus , control bus, what are they?
I have come across so many weird words i dont understand dma, interrupts , memory mapped i/o devices, etc. Somebody please explain.

Ps : am learning about the fucking 8085 microprocessor in class and i can't even relate to basic computer architecture. I had flunked the coa paper which i now realise why, coz its so confusing. :'''(

If C++ is ever uprooted by "the upstart" I am going to tell people:
"I use an electromagnetic probe to move around oxidized iron filings to form logic circuits for a living."

Any recommendations for introductory books on electrical engineering? I'm looking for something that goes into detail on the basics: tension, current, resistance, inductance, capacitance, etc. I have very little knowledge on the subject (I know what the basic components do and that's it) and I found myself struggling a bit with the most basic concept: voltage.

I grabbed my multimeter, a few resistors and a battery and played around a bit. For some reason it doesn't really "click" why on a 5v circuit with 3 2.2k ohm resistors (I think) the voltage around each resistor was like ~1.3 volts or something, while on a circuit with 2 resistors the voltage accross each one was ~2.3 something volts (I don't remember exact values). Like, I know that voltage is a difference in potential, but I still don't get it and idk what I'm missing. Why is the difference in potential accross a resistor different if the circuit has 2 resistors in series instead of 3. It kinda makes sense in my head but at the same time it doesn't.

In short, I want to know the "why" stuff works the way it does, not just the "how".

Also, if the book covers common practices, components, and circuits that'd be very helpful. I want to learn how to build well-designed, reliable and safe circuits.

Holy fuck... why didnt I know about Fritzing earlier... AND WHY ISNT IT SUPPORTED ANYMORE! Its such a fucking great tool... Its so fucking great... I never used a tool so fucking capable for Prototyping with my circuits...

Maintenance guy? They will need their circuits clean

One day I decided I wanted to build robots.
And not kidding the reason I wanted to build them was because I wanted someone interesting to talk to and stil not kidding I even fantasized about a robot girlfriend... Lame I know I think I was a lonely little guy back then, though even after 7 years or so it doesn't feel as though it's that long ago. Maybe because things didn't change that much. Which is worrying but it's not the topic so I will pass on that future-past worries bullcrapper. After learning how robots worked and what made them function so things gradually led up to me being more interested in machine learning applications and software. I learned Arduino at first, I think I still have some messy circuits and old arduinos around. I only finished one robot though and it couldn't even support it's own weight. The servo motors were taking too many amps that heated up the little arduino even with a fan attached. Provably I should have made use of mechanics for robots books and calculated things first. But even though it couldn't walk properly I still felt success and I loved it like my own kid (me taking it apart was questionable but believe me). After that I focused more on writing code than using my hands to make things which was a pain in the ass if I might add.
After learning arduino and making that failed project of mine. I then picked up C++ wrote hello world program usual things a starter would do. It was the language I wrote my first game which I finished and this time it worked. But I never released it which was partly because I didn't want to spend a hundred bucks on a license for the engine and I also knew that it was a shit game. If I were to describe; lines in different colors come from the top you need to hit the lines with the same colored columns to break them. The columns changed their height and location on random. The lines sped up and gap between them decreased. Now that I think about it it wasn't half bad. But the code was written in game maker studio's version of C so I have no way to salvage it.
But I learned a lot of things from that project and that was the goal, so I would call it a win. I don't remember but after sometime I switched to python. And I'm glad I did, it's fun to code in which was the main reason I coded in the first place. Fun.
Life happens and time passes,

Now I'm waiting to enter college exams in a few months after hopefully passing them. My goal is to get into computer engineering which will be extremely challenging because it's the highest point department in the university I'm aiming at. But hey if the challenge is great the reward is greater right ? To be honest I'm still not sure about my career path. Too many choices. So I will just let my own road called <millions of similarly random events that are actually caused by deterministic reactions, to affect you and your surroundings leading up to a future which only the Laplace's demon can forsee> guide me. Wish me luck.

I would really like to get into electrical engineering and microcontrollers, but I dont have any (real) experience with circuits and stuff.
Can anyone recommend some books, starter kits, good microcontrollers or youtube channels?😄

Hey I’m majoring computer engineering in one of the best universities in Turkey. But we take a lot of electrical and electronical courses. Topics are like introduction to electronics ( pn junctions , bjts, mosfets etc), electrical circuits ( mesh analysis, inductors, small signal analysis etc) . And were solving real hard problems. How is these stuff gonna relate to my software developer side? I can’t see the connection and benefits of learning the page long formulas about drain currents. What do you think about them?

2days i was programming for lis3mdl sensor, i used different circuits different lines of codes but the problem was none of them...
Look at the pic, my colleges just didnt see the simple word bottom , the footprinted pins clockwise instead of counterclockwise:(( whole 2 days gone!!

Let some number P be the product of two factors, A and B

Let the iterations of A*1..2..3..N up to B+1 be a directed graph.

Would this graph be eularian?

If so then it should be possible to use the BEST algorithm to count the number of eularian circuits, yielding B, no?

Edit: this is supported by the following text:

An arborescence can equivalently be defined as a rooted digraph in which the path from the root to any other vertex is unique.

* * *

Where the product of any two primes is unique, the path to it across our graph here, is also unique.

So my desktop suddenly stops working in the middle of a Skype call. I open up the cabinet and the processor fan wire has been plugged out with subtlety. No visible damage of short circuits. What sorcery is this?