Welcome to /r/ElectricalEngineering!

Where can I find a small broad bandwidth (roughly 1 Hz to 1 MHz) transducer that could produce the aforementioned sound frequencies? Are there devices or appliances that I could get the needed transducer out of? If purchasing one isn’t an option, how could I make one?

Hello, Hopeing someone with more knowledge about LCD moniotors could shed some insight as to what could cause the type of interference shown in the attached image? It is a computer monitor that is part of an operating center with a few mutli-monitor desks with USB connect speakers at each desk. The issues range from what is pictured to turning all the way off and staying in a error state for a few days before returning to normal. I am told that power cycle/unplug does not fix the issue, and replacement monitors work fine(ie. its the monitor with the issue not the source). The issue is very intermittent and began when the new speaker system was put in.

What sort of sources could cause such interference and what components are being affected in the monitor. I'm going to be doing a lot of onsite troubleshooting with various equipment, so any ideas help

The speakers are b1952, that I believe connected over USB to a central hub and powered by a power supply at each desk. Though they could possibly be connected directly to the(a) Desk pc w/ or w/o a power supply. I have also been told that the monitors that fail are further away from the radio/speakers( open to interp).

The Monitors are some HP business class monitors.

Thanks

https://preview.redd.it/tfcmi8g2y8yc1.jpg?width=352&format=pjpg&auto=webp&s=4cfa60a3b51ffa7f676701c6d5c0121f55dc9eef

I'm using an Arduino UNO and a relay to control a 12V solenoid valve.

The Arduino sends the high voltage signal to the input pin of the relay to open the valve then sends the low signal to close it.

Positive power supply is connected to COM, positive terminal of the valve to NO. Negative terminal of the valve to the negative terminal of the supply.

The red light becomes lit indicating the relay is open. However, the valve does not open.

What could be the issue?

I am currently an undergrad student studying engineering. I was wondering about the skills to develop as an future engineer to fit myself in the industries. I know Soft skills like communication, problem solving skills are necessary but could you list some other too. Also mention about the method to learn those skills. And I am doing electrical engineering to be exact so any skills particularly important for electrical engineers and could you also provide resources and guidance to learn those skills.

Is there place to see a summary of what different EE positions entail?

I have a variety of batteries that I don't plan to use for a long time, but I also want to avoid them becoming a fire hazard. My plan is to discharge each one completely. However, I haven't found a device that can discharge batteries with varying voltages. Any suggestions?

Hi everybody, can someone suggest me a book about electronic devices models. With model i mean for example gummel-poon circuit equivalent. The reason of the question is the fact that the majority of mine books have no equivalent circuit of a mosfet.
Thanks in advance for the help i really appreciate all the help. :)

I’m currently a junior in college studying electrical engineering. I’m wondering if there’s any tips or guides to be successful in the EE industry? I’m have around a 3.0 gpa currently and worried about getting internships and first job out of college. I’m a first gen college student so i have no idea how this works. Thank you!

Im a second year ee student and I am just so exhausted man. I feel like since my first exam of college I’ve been hustling for mediocre results on everything (and I KNOW I know the material because stuff that I learned months ago will come up in my classes and I am able to do it, the grades and results just don’t show it). EE is a nightmare major at my college but I seem to be doing worse than all of my peers in general. I really really try to not cheat and use Chegg and gpt for my work, but it is so frustrating looking at other people who literally gpt all their homework do so much better than me on the exams and assignments. I’m tired of fighting such a losing battle. I absolutely love my classes and I know that I love EE but I don’t know if I’m even good enough at it. And it sounds so stupid and so cliche but that’s really how I feel, is passion even enough for something like engineering?

I am trying to use a digital relay (Autonics LE4S) to apply power to a DC motor for only a few seconds before switching off. I am struggling to get the relay to start counting once power has been applied. I have the circuit configured per the shown diagram, but have also tried jumpers and switching pins in just about every combination possible, but have yet to get the relay to start counting once power (VDC) has been applied. What am I doing wrong?

The functionality I'm going for is to close the toggle switch, relay detects input power (VDC) and applies power to motor for 1.5 seconds before opening the circuit to shut off the current flow. Switch is manually opened, relay is reset and the process is repeated.

Any help is appreciated.

https://preview.redd.it/4xcjxd7228yc1.jpg?width=1254&format=pjpg&auto=webp&s=69bdbe0d942110b13e32b2cd716ea8e3cb9e578e

Hi all, I am a student currently doing my first electric circuits course and I am really struggling. The way I am tested is through Binary Marking, ie: it is either right or wrong. I am also tested on different concepts per weekly basis. For a very large portion of the time I have wondered how do I know whether I am doing anything right or wrong in my tests. Another issue is that my lecturer gives us work to do with no answers at all. So we are left in the dark completely. Any advice as to how I should move forward?

Anyone with kids here that had science fair projects? Did yall help them with it? If so what kinda project did you guys do? Genuinely curious. My nephew wants to do something cool with me when he gets into the 4th grade, so I'm curious if anyone else here has helped their kid with this. Thanks!

https://preview.redd.it/20nyfk9fm7yc1.png?width=594&format=png&auto=webp&s=41c4e46049a157d64222b1fc2115d019f4e9c0fa

https://www.ieee.org/

Join IEEE

https://www.ieee.org/membership/join/index.html

https://preview.redd.it/7anqa47im7yc1.png?width=2010&format=png&auto=webp&s=28b746c085016db9f4ca49c5021bc79e189800c9

vs Join IEEE society

https://preview.redd.it/n9txjk4jm7yc1.png?width=2210&format=png&auto=webp&s=889c1033a71ef9c45514e849b2f1d892ac3a179e

As someone who doesn't have a specific interest in something as specific as antennas or aerospace electronic systems and just wants to volunteer at a local IEEE branch, should I just ignore the "join IEEE society" part of the website and just make an account though https://www.ieee.org/membership/join/index.html ?

How does this work? What is the purpose, like is point of all the mini societies to collect dues twice (one for main IEEE membership and one for a soceity)? Or how does it work?

I've been working on a project all semester to build an audio amplifier circuit to amplify a ~ 1mV input signal with gain of 500-2000, without output signal distortion. It's supposed to drive a speaker at the end, which we are using a 10 ohm resistor to model. We are to cascade 2 common emitter BJT circuits and 1 emitter follower. I took my latest design to the lab yesterday, and it literally went up in flames. I'm panicking because I'm out of time now and I really need to focus on trying to pass my other classes too so l can get into my senior capstone class.

Does anyone have an example(s) of a circuit meeting these specifications I could try? Attaching a screenshot of the one that didn't work. As is, it went up in smoke. When i tried adding a capacitor at the end, it caused major clipping.

It may vary depending on sub-discipline, but just wondering if there are any common themes. Or maybe just in your individual opinion based on your role?

I'm asking as someone considering pursuit of this field. I have enough life experience to know what one studies in school is not necessarily reflective of the actual job itself, so I'm looking to get insights from actual practitioners.

Thank you!

Good morning all, I am currently trying to start an over the summer at home project to hopefully expand on my understanding. The goal is to create a battery powered "track player", I say this is quotes because the tracks I want to play are just short adudio snippets roughl (less then 10 seconds). I know I will need a fast microcontroller with a decent amount of flash memory, a DAC, an amplifier and a speaker. However I am little lost on what else to look for in selecting these. This circuit will also need to include 2 buttons. One to select a track, one to play the track, a power switch and maybe an LCD?

What software do I use to download my audio files and to program the controller?

Thank you for your help.

I am working on a boiler feed tank and recently had problems with the tank overfilling. When I pulled the probes out, I found the relay was wired incorrectly to its respective contacts/probes. The other issue I have is the high level probe goes down to about 50% of the tank. Since the probes are metallic, can’t I cut them to size? I read up on this and saw someone loosely reference what I’m referring to and called it “field cutting”.

For reference Im studying at an technical university in mid/western-europe. And man, this is such a complex subject. Out of all, it is probably the hardest one for me. There are so many difficult and abstract things to grasp.. From Vectoranalysis to Multipolexpansion over to potentialtheories and Separable partial differential equations...

i like it, dont get me wrong, but often its just really hard to wrap my head over certain solutions and im thinking: How the hell should i ever be able to figure that out on my own? Im curious: How was that subject for you guys?

This is for powering the bicycle light system on bicycle, I needed a 18v drill pack to 3.7v and 5v step down. where is circuit that I can build, or least getting some information. I think LM7803/LM7805 will be too hot.

I am considering Fenix BC26R but the battery power may be little too small for long distance at night. The battery for Fenix light will be nominal at 3.7V, and is rated as 5,000mAH.

I am also adding some bright green light on the side bicycle so drivers can see me better. This could be extra 5 volt of power. There will be chance of using same power to charge the phone.

So i chosen to select the drill pack battery and wire to the lead of the headlight. The drill pack is Milkawkee 48-11-1815; it has 27WHr at 1.5aH for 18 volts. I may upsize the capacity later.

I don't know what i can chose the transistor to step down and not to get too hot at very small current. I needed the whole current available.

Please help and thank you, sorry for bad grammar.

I have a 225V battery bank connected to 10 filament lamps each of which is 100 watts, and there is a single pole 10A circuit breaker connected between the battery’s hot wire and the lamps’ .
At the moment of switching on the CB everything is normal and the lamps are turned on, but when I switch off the circuit breaker it produces a big spark as if it is burning. Now my question is why does it spark even though filament lamps are pure resistive and the drawn current isn’t that much ( 4.44 A aprox.)

Context: I am entering my final year of my undergraduate degree for electrical engineering and I'm taking alot of classes next semester dealing with RF: RF Circuits for Wireless communication, Microwave Solid-State Circuits, and Antenna Engineering. I am also talking a linear control systems and a DSP course as well. I have an internship over the summer (not RF). I want to join a research team next semester. My goal is to get really, really good at RF.

My Current Strategy: I was planning to read a textbook pertaining to one of my RF courses over the summer.

Question: Assuming this is the best way to go about improving, what textbooks could you recommend pertaining to the subject matter of my RF courses? If this is not how you would go about improving your skills, what other approach would you advise me to take?

Hello, I've been working a little over a year as an Electrical Engineer mostly doing Siemens PLC work with some electrical drafting and wanted to pivot to another field. I got interested in Test Engineering since it seems pretty hands-on and not as specialized as what I'm currently doing. However, it seems pretty competitive and the skill scope doesn't seem as consistent as automation.

What are some general skills you'd recommend to get my foot in the door? I already have some basic testing equipment at home (Power supply, oscilloscope, etc) and I'm messing around with KiCad, though I'm not sure how related that'd be.

Also, are there any other keywords that I should look out for when searching for these jobs? I see them slotted under Test, Final Test, Electrical, and Project Engineers.