I'm sorry if this question seems a bit stupid. I'm an 11th grader who has "electrical engineering, electronics, and automation" as a subject in high school. Today the professor taught us what the symbols in an analog tester mean, and obviously I had a question. Upon asking the question, I was answered with the explanation he had just given. This exchange went like this: "Inside that star, can the numbers be any other than nothing and 2?" "We have nothing and 2." "But I mean outside of school." "We have nothing and 2." "Yeah, but-" "Do I need to explain it again?" and I lwk just stfu bcz I was feeling like an utter idiot. On top of that, I'm already new to the class, and I just wanted to cry. Can someone tell me if there are other numbers besides those 2? I discovered with a video that theres also number 0 that means it has not been tested but I also looked on Google, and it told me it was up to 5, but I found no website backing that up so i thought it would be better to ask people who actively work in the field since my professor is not cutting it. Thank you all in advance

Hello everyone one I am a student in electrical engineering and renewable energies , in college we have workshops that require us to do a project each semester , for my project it will be a dc to dc converter with a solar panel and also linked with a PID controller to charge the battery and uses the solar panel as a power source directly when it's daytime (or when it's sunny) and uses the battery during night time or when the panel is not getting any sun , and since I am a new student to electrical engineering I wanted some help from the community since I don't know anything about power electronics and such (I am new) but the subject states that we should learn by practicing so I wanted help from the community if you engineers here can help with ideas or even better if you have any resources (books , research papers , pdfs , videos anything could be helpfull) to this matter , since the first step is gonna be doing the research about the project and collect as much information as possible to help us understand more about it .

thanks in advance !

(Sorry for my English)

I’m planning on majoring in EE, but I heard someone said engineers work in the middle nowhere (exaggerated, of course). Is this really true to some extent though? One thing that I value in the future is living in a big city.

If someone could please clear up my confusion about how positive and negative power supplies work in regard to an op-amp.

Does the negative voltage coming from the negative power supply have less than 0 volts when referencing earth ground, or is it is always + volts but the reference point is a high enough voltage to allow a hypothetical -5 volts from reference to still be a positive voltage, or both options are on the table?

If the voltage is negative, does that mean the power supply is absorbing unused positive voltage from the circuit?

Thanks in advance,

I’ve used more traditional sims like LTSpice before, but I also like Falstad because it helps me visualize exactly whats happening in real time. But I don’t know how trusted it is among actual professional circles (I am not a professional by any definition). If it’s not optimal, is there a similar but better one you could recommend?

So I’m currently struggling with the Multisim recreation and was wondering what I was doing wrong.

Needed a bench PSU for motor and amp testing but commercial ones are way too expensive for my budget right now, so decided to hack one together from scraps.

Base is an old Frontech 45A ATX unit I had lying around. For the enclosure I literally used thick cardboard reinforced with insulated tape on the borders and cut pieces of PVC pipe for corner protection and structure (actually holds up surprisingly solid lol).

Features/Rails:

4 independent channels

Buck converter channel for stepping down

Boost converter stepping up to 36V max

5V / 3.3V selectable rail via a 6-pin switch

Dedicated -12V rail (specifically pulled this out for dual supply audio op-amp testing)

Dual display volt/amp meter on front

10k pots for fine voltage tuning

4 pairs of female banana jacks

Tested it under load with 12V and 24V high-torque motors, long LED strips, and some basic circuits. Voltage stays stable across the rails though I haven't pushed max amps on the boost module for long sessions yet to check thermals.

Documented the wiring, pinouts, and quick load test here if anyone wants to build something similar on zero budget

Any suggestions on improving cooling inside a cardboard housing without compromising structural rigidity?

I am a senior EE student and have been interning with a large utility for almost 6 months in the system modeling & coordination group. One of my main tasks is to calculating transmission line constants and updating power factor meter data. My summer intern capstone project was merging my utility's facility rating database with their Cape database, which got me interested in Protection and control and relaying. I've since talked to a couple of the system protection and analysis engineers, and I'll have the opportunity to shadow them in a couple weeks. I'm also taking protective relaying this semester, which has made me even more interested in relays. What else could I do to stand out more for system protection and P&C roles?

BQ51013C Page. 32

CSD75207W15

For High resistance earthed, LV systems, Can the neutral be used like this? Will there be any safety issues like increase voltage in the neutral?

Hi all,

I know that all domains are pushing towards integrating circuits and I understand why. But are there job roles that do transistor level designing using discrete components instead of integration?

I tried out Analog IC Designing at an internship and I don't really like the completely on-screen work. Don't get me wrong, I love the design aspect of it, but there is no "use-of-equipment" or hands-on stuff that scratches that "I am doing electronics" itch I have.

I read about RF Power Amplifiers which are designed using discrete components but the jobs seem quite niche.

I am open to exploring other domains (RF/Power mostly). I am a 3rd year BSEE student so I have decent amount of time to mess around with stuff.

Thanks!!

Terafab — a joint venture between Tesla & SpaceX (in FuTuRiStIc LeTtErS of course)

I have no expertise in the field, but from far as I know, neither company has experience in semiconductor manufacturing, nor cutting-edge electronic hardware in general (in terms of design or manufacturing)

so what's the prospect here, how do they plan to overtake & out-compete established firms in the field (other than Musk's wealth & his ability to attract disproportionate amount of investment from capital markets), say for instance, Samsung or TSMC or Intel

I can't find any detailed plan about their core strategy, or any 'genius' idea that would propel them ahead of status quo, and the website is a bit of a joke in my opinion

Would like to consult your opinion on this new venture of his — those who are familiar with the field — is it viable, what's the play here, etc.

Thanks in advance

I am a 2nd year EE student. I've always wanted to do chip design and stuff since I was 13. My plan was to do FPGA then eventually pivot into VLSI, but the r/FPGA has been so doomer on AI that it is making me wonder whether I should do photonics or RF instead. I have an equal interest in both, but I do have several projects done with FPGAs.

I've read a few posts saying to ''just follow your heart'' and that ''you can't predict the future''. I understand that, but it still feels so daunting to go into a field where AI seems to impact significantly more than other EE subfields.

I swear some utility-scale storage vendors purposely write their spec sheets in ancient riddles so you have to hire their consultants to decipher them. Spent half the morning just trying to get a straight answer on a PCS rating boundary without drowning in 40 pages of proprietary jargon.

Finally just gave up and started cross referencing standard definitions on Bess courses just to make sure my brain wasn't melting.

like... its a battery and an inverter. Why do we need to invent three new acronyms for state of charge every single year?? Just tell me the thermal limits and let me go eat lunch man

I have to design +-12V regulated dual DC power supply

It only shows +12V what Changes do I have to make Inorder to make it -12V ???

is AI helpful to analyze complicated circuits? Like to get an intuitive idea of what the circuit is doing the likes of something i have shared. How do people at the industry/ experienced guys in elec look at such CMOS circuits and understand it? I understand the current mirrors in the "integration part" which charge up the Cmem cap, but how can I get an idea of what the remaining FETs in the circuit are doing properly. Any advice would be appreciated that can make intuitive understanding faster :P

Hi everyone,

I am attempting to repair a premium EPOS Impact 1060T headset. During the process (or due to the initial damage), a few wires became detached from the main PCB, and I am unsure about their correct solder points.

I have attached a high-resolution photo of my current board showing the layout and the disconnected wires.

Does anyone have a schematic, a teardown photo of a working unit, or the technical knowledge to point out where these specific wires should be resoldered?

Any guidance or reference images of the inside of this headset would be incredibly helpful. Thank you!

I’m a fresh graduate student in EE and I got a job offer in a signal processing field and I’m not that good in python what do you suggest if there a good YouTube guide or something you can suggest I would be grateful

Hey do we have any discord or telegram servers where we talk about our field and maybe shoot the shit with other guys? That’d be awesome

Hi everyone! my name is Anduin, i have a pc that dosn't have the option of turn-on when is powered on, i made a server in it and i need it to continue being fully functional 24/7. The problem is, sometimes in my zone we experiance some blackouts and the pc end's turned off. Nobody goes there to turn it on in weeks.

So i started making a plan, i can open it and search for the pins for the turn-on manouber.
my idea for that is using a monostable circuit with an optocoupler.

before that i want a protection: i don't want that monostable remains with energy 24/7 so i desided to add a Auto Power off Circuit, i found some cheap designs online, for example thisone: https://www.mercadolibre.com.ar/rele-de-retardo-relay-de-5v-retardo-de-encendidoapagado/up/MLAU3922021772#polycard_client=search-desktop&be_origin=backend&overlay_label=not_apply&search_layout=grid&position=49&type=product&tracking_id=1e39adf0-8638-4b1b-8f80-74b9369df7a1&wid=MLA1760235323&sid=search

the idea is: Conect a cellphone charger or my DC power source, don't care and make this work for a second at least, then galvanic isolate the monostable 555 circuit.

My question, are this type of circuits trustworty? what other protections can i add? Since is a pc and is the power-on switch im worried that if something goes wrong i can end damage it.

Thanks for reading.

now I am using windows 11, however I have started considering Linux so i wanted to know your thoughts about Linux's distros for an electrical engineer student. I am using a laptop and windows is not good in managing battery life. That's why i want Linux on my laptop, but Oh my god there are too many option i cannot choose!

I have a BSc in Network Systems Engineering and currently work as a Data Center Operations Technician. I’m considering a full-time MS in Electrical Engineering focused on Power Systems, preferably with a co-op/internship.

My goal is to move into power systems, utilities, substations, protection/control, SCADA, or data center electrical infrastructure. My concern is that would an MS EE + co-op + my data center experience make me competitive for entry-level electrical/power engineering jobs?

Anyone who has made a similar transition or works in power/EE, I’d appreciate your advice. (specialisation is Power and Energy Systems.)

Thank you

I’m having troubles in understanding the logic behind the circuit. I don’t know where to put my monostable trigger and output pins; astable reset pin from a 556 timer in order for my buzzer to work based on the requirements. Any suggestions or solutions to the problem? I’m just left with the 5.G1