I am currently a high school senior and want to push myself to become a successful person. I've passed Algebra 2 and I currently do not have a calculus class because I didn't want it to affect my GPA. What can I do to prepare myself for the summer?

I am completely stuck at this one. I decided I wanted to learn how to convert BCD to decimal using a IC, binary to 7 segment display. I purchased some SN74LS47 ICs off amazon and common-anode 7 segment display. Wired it all up according to the datasheet and a few other schematics. Ive doubled checked this over for a few hours now and I think its the IC, maybe I got the wrong one? Here is the info -

The IC I bought is apparently Texas Instruments. I got it from here -

https://www.amazon.com/dp/B07WCH659M?ref=ppx_yo2ov_dt_b_fed_asin_title

The IC in the image says "44A1DKM E4" and "SN74LS47N", but what I received was 'GYZ2208H" for the top number, the bottom number does say "SN74LS47N".

The IC doesn't function properly though, when all my inputs (A,B,C,D) are LOW, only G lights up, which is completely reversed of what I want. I have been using this datasheet -

https://www.ti.com/lit/ds/symlink/sn7447a.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1733009571952&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Fsn7447a

I may have a fake IC or something, it is branded with TE logo. I am not really sure what i'm doing wrong.

I have to run about 75 feet of coax from my backyard along my house to the point of entry. Can someone recommend me the very best brand of shielded coax that I can use for this?
It will be running through a jungle of signals and noise and it has to stay as clean as it possibly can.

I will be using RFI filters and grounding at the point where it reaches the house and then again at the entry box.

https://preview.redd.it/wt4z0l2f874e1.jpg?width=500&format=pjpg&auto=webp&s=92a84bca078236395cd19886e7a046327cf6e5e9

https://preview.redd.it/2fmrrx5v374e1.png?width=794&format=png&auto=webp&s=92ea14e92a1d67abb5efb04b51ce1dde54957fff

How does impedance mismatch exactly effect this topology in a way that makes it able to work with wide bandwidth filters but not with narrow bandwidth filters?

Hi guys! I think Electromagnetics is really cool, including generation and transmission part. But i am kind of unsure if i really want to do this or should I rather go for specialization in Communication engineering or Medical Technology.

I graduated in EE and got some decent programming experiences in industry. How is the job market in these specializations?

Hi all,

First time posting on this subreddit, hope you're all having a great weekend.

I'm building a system for overheight vehicle detection. The last component I need to choose is a break beam sensor that is reliable. I was wondering if any of you had experience with beam detection systems (IR, laser etc). I would appreciate a recommendation for something that is highly robust. Key considerations would be weather conditions (fog, rain, snow), alignment, and reliability of the transmitter-receiver. It's not an area of expertise of mine so would appreciate any insight you guys can give!

Im practicing my breadboard skills for my final lab exam and the teacher gave us this exercise including a circuit we have to replicate on a breadboard. I wanna make sure i got it right

So basically, I taped together a bunch of AAA batteries and I’m using bits of metal to transfer the current through the batteries but whenever I hook it up to my RC car to power it it just isn’t working. Yellow is what I think the electric current should be doing and black is where the metal pieces are to transfer it from battery to battery.

With Christmas coming, relatives are asking what I want for Christmas, and all I can think about is how beneficial having my own oscilloscope and bench PSU would be. However, I know very little about the inner workings of an oscilloscope and what's good or bad, let alone how to ask family members for one as a gift. After reading the wiki on r/AskElectronics, I'd still like some input from strangers on the internet.

SCOPES

Budget: <$200 is perfect, $200-$300 is doable, anything over $350 is out of the question.

Type: Either. Digital will likely better fit my desired features, but I will happily take a cheap, usable, quality analog scope. This is my first scope after all.

Channels: Happy with 2, any more is a plus.

Use case: Mostly just to view a waveform and its amplitude/frequency. I do a lot of projects with audio synthesis and signal processing/filtering. In the future, I'd like to explore power systems, audio systems, RF, and maybe some microcontroller stuff, but that's less of a priority.

Bandwidth: See use case. Whatever works works.

Desired Features: Autoscale, single shot capture, and recording to USB. Trigger is probably important too, although I have rarely used it in my three semesters of college (maybe that's just a skill issue). I can't think of any others.

My local MicroCenter sells Siglent Technologies SDS1052DL 50 MHz Digital Storage Oscilloscopes, and from what I've seen, they seem to be solid scopes and meet most if not all of my criteria. That said, I don't know if the linked scope is worth it, and I know buying used is often preferable. What have been your experiences? Are there any better scopes out there?

POWER SUPPLIES

As far as power supplies, I've chosen to rely on the wiki and ask for a used HP/Agilent E3610 or a new Korad KA3005D. To those who own or have used either of these, what has been your experience? Is one better than the other given that they cost about the same?

Thanks for your feedback! This is probably needlessly long so thank you if you've read this far!

TLDR: I'm asking for a scope (Siglent Technologies SDS1052DL) and PSU (used HP/Agilent E3610 or new Korad KA3005D) for Christmas and I'd like some insight.

Random question for this sub I guess.

But my dad just retired as an electrical engineer. He tested the chips that are now on Mars rovers. Cool stuff.

He has a lot of free time to read books and I was wondering if you all with the same mind have any kind of book recs for me to gift him? He is super interested in problem solving and space, but any genre is good. I am not bookish, so I need some help! Thanks!

Hey gang! Preface: I know nothing about anything, so if you could explain in Layman terms that would be appreciated. Consider me a cavemen recently discovering fire <3

I have a small DIY project in mind and was wondering if you could share some insight.

I'm planing to 3D print a small wind turbine, slap some magnets on it and some copper wire and hope that it will generate enough power to heat a up a 2-cubic-metre greenhouse by a degree or few (If I'll get to increase the temperature by whole 3-5°C, that would be a tremendous victory).

I have no idea what to do next with that though. While I can somewhat understand the generator part, I learned that I need a resistor to convert the energy to heat. With that in mind, questions:

• How do I make a resistor?

• And how do I connect that to the generator (With wires, I take it, and that part is absolutely Googlable)?

• And if I figure out a way to build the resistor to begin with, how do I extract heat from it afterwards?

• What are the precautions I should take in order to not to burn down the neighborhood?

• Is there a way to measure wind turbine's energy output prior to continuing the project, so I could calculate whether it is strong enough or not? (Maybe it just needs a sister-turbine next to it)

Thank you all for your input <3

I’m trying to find a 24 volt 1.5 amp DC fuse. I’m trying to install one on my trolling motor to prevent a future circuit board failure if the drive motor goes out. It seems the company didn’t use one to increase replacement part sales. Is there a difference between different voltage fuses with the same amps rating? I’m finding 250v 1.5 amp fuses and that’s about it. Found some tiny circuit board looking breakers but I don’t know anything about what to do with those. Can anyone give me any advice or a direction to go?

Hey fellow engenieers or students. Does any1 have an idea how to solve this problem?

Hey fellow engenieers or students. Does any1 have an idea how to solve this problem?

I took logic 1 last spring and I did fairly well, it was a lot of circuit building, using a bread board and logic gates we got from TI. Pretty cool class. However, logic 2 is much different, and I’m afraid the teacher has lost me. The course description read as more conceptual and designing. We have been coding in verilog on ModelSim and analyzing waveforms, and there has been a significant spike in difficulty over the last month. We began talking about FPGAs and PLAs, about buses, LUTs, decoders, shifters, Shannon decomposition, and the list goes on. Is there anywhere I can learn this content more concretely? Or is the answer as simple as reading the textbook thoroughly. My teacher is Korean and worked for Samsung for many years, and wrote the textbook we use in class. Very smart and cool guy, but not a good “teacher” if that makes sense.

Im studying computer science but im getting so into building things and using microcontrollers and im planing on building a pc based on the 65c816 and my only possible hand-made power supply is a 5V 1A old phone charger but i dont know if too much amps could fry it or it just uses the mAs it needs. If it does, why? Its internal resistance takes care of the extra amps? But what if there are too much amps the power dissipation is bigger than the resistors can handle? Im confused.

I am in process of building a a motor control panel. After wiring everything I was measuring resistance values and found I was only getting 1ohm between L1&L2, infinity between L3. I thought I miswired a motor starter somewhere so I unwired everything and still was getting that 1ohm value. Finally I traced it down to my CT which is using L1&L2 for primary feed. I unwired the CT from power distribution and measured across H1 &H4 and that’s where the 1ohm is coming from. This is a brand new 2000va CT, which jumps H2 &H3 to step 480 to 120.

I went through our parts store and found a similar CT and it reads a similar value. I found another CT with much lower VA that reads 80 ohms across H1&H4. What gives?

I fully expect my breakers to trip if I turned this panel on. Are these CTs bad? Or am I missing something?

Hi everyone! I was wondering, is there any website that can help to monitor and/or has data about zonal grid congestion in Europe, for example in Germany/Netherlands/France? I’m writing my thesis regarding this issue and would be really thankful if someone could help me. Seems like this is a black hole in terms of data availability. Thanks!

My dream job post graduation is to work on headphones and speakers (Sony, Sennheiser, Bose, etc). However, I can’t find anything online about the work conditions, salary, education level and classes needed to specialize in the field. I only get information on audio engineers that work directly on audio and not the hardware.

If there’s anyone here currently in the field or aspiring to be, tell me about it!

Hello, I'm a romanian bachelor physics student in my final year. I'm looking forward to continuing my studies with a master degree in another country where I could also continue living. My top choices would be Germany, Switzerland, Netherlands and Belgium, but I'm open to other suggestions as well. My masters choice would be in electrical engineering or something energy related ideally english taught, my priority is finishing masters and having a well paid, future-proof job. Do you have any suggestions, thank you!

https://preview.redd.it/yevjystdb34e1.jpg?width=2756&format=pjpg&auto=webp&s=0dbe894b8b54fa3998dc111ce371e8dad28f7256

Hi, I’m stuck on a circuit problem involving a PMOS in a voltage divider.
How do I calculate the gate-to-source voltage (V_GS) of the PMOS to determine the maximum allowable W/L ratio?

What I got so far is:

Using this equation: I_D = 1/2 μ_p * C_ox * W/L * (V_GS - V_TH)^2

Calculating I_D with I_D = 0.25V/R_S = 2.78 mA

And I can determine V_S which is V_S = V_DD - 0.25 V = 1.55 V

But now I am stuck because the V_GS is missing in order to determine the W/L-ratio.
R_1 and R_2 are not given.

So how can I determine V_GS?

I have noticed that FOR TRANSFORMERS, we often need to add more axles than required (space wise, the transformer can be transported with 6-8 axle lines, in the picture you can16 axle lines). This is due to the ground bearing limits.

The thing is: to transport transformers, you need to go to the electric plant, and that means perhaps crossing bridges or weak structures, due to the lack of river or sea nearby.

The question is: why electricity plants are not built close to water ways? What is the reason is it cheaper to build it close to the town you need to energize?

(The positive voltage rail at the bottom is where VCC of the ATMega receives its power)

I’ve tried:

1. Breaking the connection at the output of the voltage regulating MOSFET and placing the red probe of my multimeter at the MOSFET’s output, with black probe in the positive voltage rail.

2. Placing a 1 ohm resistor in between the positive wire of the battery and the input to the MOSFET, and measuring the voltage across it.

Are either of these methods correct?

If you had to min-max your studies in EE which courses would you pick, excluding basic courses like Calc I-III, Physics I-II, Linear Algebra etc.? Which courses can be taught yourself using the internet and which ones are almost impossible to learn by yourself?

From my experience I think DSP and Photonics is very valuable to get taught by a good professor, while resources for learning programming microcontrollers for example are pretty widely available online.

Im an EE student and we have a project in constructing DC motors. Question is: does the stator core have to be metallic for the motor to spin?

I have seen videos on youtube where they used a PVC pipe with screws drilled onto them as the armature core. Then the windings were coiled around that.

Suppose that efficiency is not the goal. The only objective is for the motor to spin. Will this work?

Hello! I'm looking to find where to buy a replacement part for a solar powered outdoor light. It looks like in the day, the solar cell powers up the battery, and when no power is being recieved, the battery powers up the lights. Recently it stopped working.

It seems to me that this little IC has been damaged - the battery is charged according to my voltmeter, and solar cell is powering up, but when the solar cell is covered the output drops to 0. My guess is that this IC is some sort of switch. I am having trouble finding the part. Any hints?