/r/ElectricalEngineering

Photograph via snooOG

A place to ask questions, discuss topics and share projects related to Electrical Engineering.

A place to ask questions, discuss topics and share projects related to Electrical Engineering.

Rules

1.Be Respectful

Be respectful of others opinions. Intelligently explain why they are wrong, don't just say they're an "idiot".

2.No Advertising

No advertising of products, services or personal websites/blogs. Some exceptions can me made for personal websites and blogs for things such as scholarly research papers and reports.

3.Limit the Memes

A sprinkle of funny posts help keep the sub from becoming stale. However, if we see off topic, an influx and/or multiple posts (more than one a day) from a single user, they will be removed at the moderators discretion.

4.We won't do your homework

We will not do your homework for you. If you'd like help with an assignment, feel free to post the question along with your progress so far and specific questions that you have. Generic "Please solve this problem" posts will be removed.

5.No Consumer Product Tech Support Questions

No tech support questions on consumer products, unless it is truly an engineering problem. /r/gadgets is a better place for non-engineering problems.

6.No Building Electrical Posts

Posts about building electrical (residential or industrial) as well as electrical grid systems should be taken to /r/electricians.

7.No General Education Posts

Posts related to education that are not specifically EE should be taken to /r/EngineeringStudents.


If you find a post violating one of these rules please report it so the mods can review it ASAP.

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/r/ElectricalEngineering

213,464 Subscribers

1

What skills and certs for the best future career?

I am just graduating and have been working in the Canadian power industry mostly in commercial and industrial. Lots of exposure to substations, protection, networking, motors etc.

What should I be doing to increase income and work-life balance the quickest? Currently leaning towards getting a PMP over the next couple years.

0 Comments
2024/04/15
19:45 UTC

2

Video Interviews?

I'm going to be honest. I absolutely despise this idea of "initial video Interviews," but after applying to a several jobs as a new graduate I'm not certain about kicking out the interviews I come across. I don't believe these interviews are effective and a lot of people are genuinely weirded out talking to a camera. Is this something I should accept as the "new normal" as far as hiring processes or should I stick to my guns and tell them Id be happy to attend an in-person/teams interview?

(I know that could disqualify me but I don't think it's worth while to have someone judge me in how well I can talk to a camera versus my actual skills.)

3 Comments
2024/04/15
19:30 UTC

2

Where to sell vintage engineering blueprints?

My grandfather was an electrical engineer, he owned his own shop from the 1950's-1990's and his chief preoccupation was designing and building transformers. We're going through my grandparent's home now and discovered a treasure trove of HUNDREDS of blueprints and technical drawings. Some of them are in better shape than others, a lot of them are folded or have some water damage, while others are in almost pristine condition, but I think they're all fascinating and at least have some aesthetic if not historical value. Anyone know where I might be able to find interested buyers? Traditional antique collectors don't seem to have any use for something so niche. I've tried contacting folks who deal more in things like maps and written ephemera, but so far no dice. I know I could always just throw them up on ebay or etsy or something, but it would be nice if they went to a real aficionado; and also selfishly since there are so many of them it would be a really painstaking process to have to meticulously photograph, handle, measure, list each of them one by one. I'd love to just have someone buy the whole collection or bundles of them in lots. Any help would be appreciated, thank you!!

1 Comment
2024/04/15
19:07 UTC

1

Business Economics Student interested in a Second Bachelors in EE

Hey r/ElectricalEngineering!

What are your thoughts about getting a second bachelors in Electrical Engineering?

I'm a third year college student studying business economics at a mid tier UC school. I've recently realized I want a career in electrical engineering instead. I'm interested in a career in sustainble energy engineering. I want to work in developing technology for renewable energy systems.

I can't change my major at my current university due to unit cap. Additionally, I'm interested in getting research experience. The faculty at my school are not specialized with the type of research I want to do.

Currently, I'm taking for physics and introductory EE classes on coursera. I've been reading textbooks books, taking youtube courses, and research papers as well.

I'd appreciate it if anyone is willing to share their insights.

0 Comments
2024/04/15
07:44 UTC

1

Is the unknown a differenciator?

0 Comments
2024/04/15
10:49 UTC

3

How is power transferred over the line?

Hi everyone, I've always thought that in order to have a non null power transferred over a line (not null= average value over the period different from zero), the voltages at the 2 ends of the line must be different (power flows from the higher voltage to the lower one). Last week during a lecture, the prof said that in order to have a power transmission, the voltages at the two ends must have a phase shift (rms values are the same). It sounds pretty strange to me...What am I missing?

18 Comments
2024/04/15
18:30 UTC

2

Transferring credits from a CC to a four year school? Any insights on what programs are the best?!?

Sent my application/transcript out to ASU accouple days ago for their online EE program. Currently have a associates in electrical construction technology, and was wondering if anyone out there was in a similar situation? How many credits got transferred also what school you ended up going with! To preface everything above I have been a member of the IBEW for 8 years.

0 Comments
2024/04/15
16:23 UTC

2

Is it safe to connect a very small solar panel directly to a lithium ion cell, without any charging regulation?

I have a very low power project with a single 18650 lithium ion cell, which is supposed to get charged by a very small solar cell. The solar cell is only capable of charging the battery with 2-3 mA, which is okay because it will sit for a very long time where it won't be used and has a lot of time for being charged. First I tried building a very simple charge controller with a LM317, limiting the solar cell voltage to 4.2V, so the battery doesn't get overchaged, but that simply doesn't work with such a small currents.

Would it be okay to simply connect the solar cell directly to the battery? would that be safe with such low currents, without having to worry the cell will overcharge and explode? Or is that a really bad idea?

Thanks for help!

3 Comments
2024/04/15
16:12 UTC

1

What type of connector does this need?

I don't have a strong electrical background.

I see this type of keyed, screw on pin connector everywhere at the start up I work at but we don't keep good records of the parts we use on custom jobs.

Best research I can do turns up some AMP products that are called quick disconnect or circular connectors but I have no idea how I would define what part I need. Could use some help.

https://preview.redd.it/afhqz5mq3ouc1.jpg?width=240&format=pjpg&auto=webp&s=e782efc61f24d5bcb613b28db8ba0fbadc0bbe82

1 Comment
2024/04/15
16:11 UTC

0

Have yet to secure an internship - how screwed am I?

Junior going into my senior year, I haven’t gotten an internship for the summer and because I’m graduating a year early I’ve had one less year anyway. GPA isn’t amazing either main concern is getting a job after I graduate, if I can’t secure an internship with ~100 applications how can I assume I will be able to get a job?

1 Comment
2024/04/15
15:56 UTC

3

What's a good source to study Power Electronics?

This year we have Power Electronics and I'm trying to find a good second source that explains the very basics of buck/boost converters, inverters, etc. Something like Circuit Bread on YouTube. The lecture is way too chaotic lol

1 Comment
2024/04/15
15:33 UTC

2

Dilemma between electrical and computer science

I am in a dilemma..... Long story short...I have always loved practical application based subjects like mech engineering and electrical and around 2 years ago I started loving electrical and electronics engineering(I built an ebike...among other projects, I love circuits and soldering and innovation)....in India we have a course known as electrical and electronics engineering (EEE) Which is basically the best of both worlds.....so I want to pursue that in college....I'm 18 currently and will enter college in 3 months.....now the college is quite expensive and I'll have to take half the amount as student loan...hence I'll be having a pressure to perform since day one...but that's fine...as I'm willing to work my ass off and learn and work towards getting projects and internships since the first year but here comes my dilemma.... although I love electrical and electronics...on an entry level, it is certainly lower paying than computer science....now I don't want to look like a narcissist or anything but I'm a quick learner and I have a tendency to excell at anything I pick up...so I'm pretty sure that I can excell at computer science and programming too....I'm just not interested....I want to be the best eee engineer and wish to pursue masters from the ivy league but I also want to support my family and fulfill my responsibilities....

So I need y'alls advice.....should I study computer science.....or advanced programming along with eee curriculum in order to keep software and IT doors open or should I focus entirely on becoming a good eee engineer? I am extremely confused..... kindly advise....are jobs after ee really more tedious and lesser paying...or is it just a myth... Is it true that all electronics jobs went to china and there is no opportunity in that sector?

I need your advice...pls suggest some good options

Thanks for your valuable time🙏🙏💖

0 Comments
2024/04/15
15:27 UTC

12

How difficult it is to switch fields within EE?

I am currently at a power generation company and was wondering how difficult it would be to switch careers to firmware or systems engineering.

I have < 1yoe. I am wondering if I should stay at my job to get experience and then apply for other jobs in EE or will that be a bad idea?

Looking for everyone's thoughts on this and experiences from people who have done something similar.

10 Comments
2024/04/15
14:49 UTC

1

Does anyone know what these plugs/sockets are called and where/how to find them?

I'd be happy to buy them from the manufacturer but they charge $60 in shipping for $25 in parts that I need.

Male

Female

3 Comments
2024/04/15
14:24 UTC

4

Water sensor circuit help.

Hi everyone,

I'm a student who has absolutely no knowledge about circuits but needs to build a water sensor circuit that turns on a green LED when watee is detected.

I have a moisture sensor connected to a module board with 4 pins ( AO, DO, GND, VCC) which has a rating of 3.3 V/0.3A, a relay module with 6 pins (DC +, DC -, IN, NC, NO, COM), a green LED as well as a 9V battery.

Can anyone tell me how I should connect the circuit in series for it to work? also would I need any resistors? Thank you in advance for any help.

0 Comments
2024/04/15
14:02 UTC

2

AC to DC to AC Conversion Question

Hey All,

I am in Germany and will be importing US washing machine and gas dryer.

Both devices have components in them (motors and pumps) locked at 60Hz and of course 120 volts.

Both devices running at theoretical peak will consume a combined 2400 watts.

Our electrical grid here is 240 volts at 50 Hz.

There is a company that makes something called a Power X Changer which is specifically designed to make 120v US appliances work on a 50Hz network without issue. The problem is I would need two of them and one is quite expensive.

I did some looking and am seriously considering setting up the following:

- 3000 watt switching power supply converting my 240v @ 50Hz AC to DC

- 3000 watt continuous power inverter converting that DC to 120v @ 60 Hz.

The question that I have for you experts here is:

  1. I'd prefer to go with 48v DC given the improved efficiency in the power supply - but does anyone have any reasons why a different DC voltage would be preferred?

  2. Would I need a battery for this? I see similar combinations sold online without a battery - but I remember my days from doing 12v work (paid for my beer money during collage) and when a sound system max draw could exhaust an alternator's ability to charge the battery we'd add extra batteries or a capacitor. I think if the PSU is the same max output to DC as the inverter can convert from DC - then a battery wouldn't be necessary. What say you?

I thought about putting this in the electricians subreddit but this is more of a DC question and the efficiency of power supplies (I'd prefer if it ran cooler) than it is home electrical question.

If this is still the wrong sub reddit, please do point me in the correct direction.

Also - please no one tell me to purchase a local device. If I could find a local device the same size of an American machine that doesn't cost as much as a midsized Toyota, I most definitely would.

Thanks in advance!

Best,

Eric

21 Comments
2024/04/15
13:30 UTC

2

Megger DLRO200 - Power cuts out with Ground Connected

I'm having an issue with my Megger DLRO200-EN. When I plug it in with the ground wire attached, the main power cuts out. However, if I leave the ground disconnected, the unit turns on briefly before the screen goes blank (according to manual the device must be grounded (earthed) when in use. If there is no continuity the instrument will refuse to start and the screen will remain blank. ).

I've tried using different grounding points and even an external ground cable, but the issue persists. There's no visible damage to the device.

I'm handy and can open the unit myself if a specific replacement part is needed. I'd prefer to just order the part and fix it myself, rather than sending the whole unit in for repair.

0 Comments
2024/04/15
12:31 UTC

3

How to Prepare for an Exam in 3 Days: A Strategic Approach

0 Comments
2024/04/15
12:16 UTC

0

REE/RME allowed calculators for board exams?

I just bought F-789sga pero pagbasa ko sa website ng PRC walang f789sga dun. Saan kaya may list na allowed calcs specifically for Electrical Engg board exams? Merong list si PRC for CELE at allowed naman yung F-789sga pero allowed din kaya yun sa EE?

1 Comment
2024/04/15
11:09 UTC

1

Sliding Gate Extremely slow initially

Hello,

I have a sliding gate that initially moves extremely slowly after not being used for a couple of hours. It looks like the issue might be related to the electrical voltage or power supply, not to mention that I have voltage stabilizer installed on the main circuit in the house. When the gate hasn't been used for a while, it might not be receiving sufficient voltage to operate smoothly initially, hence the slow movement requiring manual assistance. However, after the initial movement, the voltage might stabilize, allowing the gate to operate normally. What might be the issue and what is the solution? The electrical motor is Italian-made by the brand Comunello.

1 Comment
2024/04/15
10:47 UTC

35

Non-technical careers one can switch to from electrical engineering?

I am not a good electrical engineer. I do have the engineering degree but with a low GPA. I have always struggled in this field. I barely scraped by in my college classes and have struggled and got fired from the jobs I did manage to find in this field.

Thing is I don't have a good analytical mind. Even during high school, I always struggled with math but excelled in other classes like history, geography and religious studies. I was a hard working student and eventually also did well in physics and chemistry but when the technical courses got more difficult in college, I struggled to keep up.

For reference, I gave GRE recently and scored in the 94th percentile in the verbal section but in the 70th percentile in the Maths section. I had only two weeks to prepare and english is not my native language.

Is there any career in which I can kind of utilize my above average language skills but below average electrical engineering skills?

57 Comments
2024/04/15
09:53 UTC

3

Hello, this is an online test I just finished and want to make sure I did the right thing. For the circled question, can I just use the difference in angle between the internal voltage of the generator and the input primary voltage of the transformer?

3 Comments
2024/04/15
09:13 UTC

1

Circuits II summer course 2024

Hello,

I am looking for an online course for this summer to fulfill equivalent Circuits II credit (also known as circuit analysis II, electrical circuits II). If any of you know of one, please let me know!

1 Comment
2024/04/15
09:11 UTC

1

Electrical engineering internships @SJSU

Anybody aware regarding internship scenerio of sjsu

0 Comments
2024/04/15
08:36 UTC

1

Laptop for Electrical Engineering?

I am starting college this upcoming fall, majoring in electrical engineering, and was wondering what I should be looking for when buying a laptop? Any recommendations?

4 Comments
2024/04/15
07:33 UTC

2

Which laptop should I get for EE in the near future. M2 Max/ zephyrus g14

As the title says, I’m debating between the two laptops. Most people I know recommend Mac because the quality is exceptional and battery life is very good and I was about to buy it. Then I read in this sub that it’s basically suicide to buy a Mac for this field. And went to consider the g14 which is lightweight and powerful. Both pc’s will have 32 gigs of ram

So I would love to hear your opinion, whether support for the softwares you use is better to this date on Mac and is it doable because I only hear praises on how good it’s made.

I should mention I have a strong desktop window pc which I may take to the dorms, but I’m not sure yet. I heard people just do a remote connection if they have a Mac, anyone can comment from personal experience whether this work method is not laggy and will make my head explode? I like to work with minimal stutters and I literally will throw away my computer if it lags

8 Comments
2024/04/15
07:20 UTC

0

[UPDATED] Resume Help 2. I took the advice here and updated my resume. Any other changes I should consider making? Recently graduated. No internships. 1.7GPA out of 4 for bachelors. 3.16GPA out of 4 for Adv Diploma. Ideally would like to get into the defense sector.

6 Comments
2024/04/15
06:46 UTC

0

New Job Help!

Hello! I just got a new job recently as a Electrical Designer. Only problem is, I don't anything about electrical anything... Is there a online course or free class I could to learn about stuff such as: Shielded wiring, EMC, Electronic components like VFD's, circuit breakers, just how circuits work in general. A good explanation of Amps, watts, volts, etc, ect.

1 Comment
2024/04/15
02:33 UTC

0

How to land a job in chip fabrication (or nanofabrication)?

I'm a second-year electrical engineering student: I really love physics and I've enjoyed all my digital design classes. Secured an RF hardware engineering internship at a satellite company this summer.

I'm really interested in ASIC fabrication (and nanofabrication in general). Not too sure how to land a role in this space (or if it's even possible with just a bachelors, though I suspect it would be difficult). I'm assuming most of the jobs in this space would be at companies that actually do the fabrication (TSMC etc). What knowledge/skills/projects/activities should I be looking at doing/developing to set myself up for success in this space?

Also, this next part is only tangentially related but how often (if at all) in the ASIC design flow do designers take into consideration quantum and semiconductor physics and if so where in the design flow would those considerations occur?

Don't have much experience/knowledge in this space so I'd love some insight. Thanks in advance?

TLDR: How to land a job in nanofabrication?

3 Comments
2024/04/15
03:45 UTC

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