Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [engineering]

116 questions
39
votes
5 answers

When Intel / AMD choose their Nanometer Processes, why were the specific numbers, 5, 7, 10, 14, 22, 32, 45, etc chosen?

When looking at the roadmaps for the CPU manufacturing process https://wccftech.com/intel-expects-launch-10nm-2017/ 10 µm – 1971 6 µm – 1974 3 µm – 1977 1.5 µm – 1981 1 µm – 1984 800 nm – 1987 600 nm – 1990 350 nm – 1993 250 nm – 1996 180 nm –…
Anon
  • 525
  • 1
  • 4
  • 6
16
votes
5 answers

Does the word voltage exist in academic engineering?

In Portuguese, the word voltage does not exist. Neither academic nor technical. In engineering, Portuguese speakers refers to volt as electric tension or potential difference. The word voltage was popularized in the Portuguese language because some…
vianna77
  • 279
  • 3
  • 7
12
votes
2 answers

Why use aluminum wire in an (old) TV degaussing harness

I used to take TVs apart for fun (and parts, and learn.) Some of the degaussing coils were beautiful -- nice, thick copper. Others were made out of aluminum wire. If I were engineering it, though, I would not have even thought of aluminum…
MicroservicesOnDDD
  • 2,557
  • 1
  • 13
  • 48
10
votes
2 answers

Why does the current not skip resistors R3 and R5 when R6 and R4 have no resistance?

I do not understand why the current still flows through resistors R3 and R5 when R6 and R4's resistance is 0. To me, it would seem that the current would skip R3 and R5, however the answer key says otherwise. I have attached the problem and answer…
David Jones
  • 103
  • 1
  • 5
7
votes
3 answers

Amplifiers without vacuum tubes or transistors?

Are there amplifiers that can work without vacuum tubes or transistors? Is it possible to create a working amp with high power without vacuum tubes or transistors?
SnoopyKid
  • 215
  • 1
  • 6
5
votes
3 answers

Building an MRI safe video camera (e.g. webcam)

I would like to use a small camera inside an MRI. The eye-tracking cameras that are commercially available are both too expensive and also not suitable for my purposes. How would one go about making a small camera that is safe for an MRI? For…
socialresearcher
  • 51
  • 3
5
votes
1 answer

What does EE10 or EE15 mean for transformer cores?

I have been studying about transformers. When I went to buy some transformer cores from Alibaba for research, I saw different names like EE 15 transformer. What does the EE10 or EE15 transformer code mean? Does that apply to any core?
Hrittickkumar Hazra
  • 61
  • 2
5
votes
3 answers

Advice for 25-50 Mbit SPI lines - PCB design

I would like to ask some advice for my layout design. I am working on a layout design. The designed PCB will be a Beaglebone Black (BBB) extension card. It is a four layer PCB with the following stack-up: signal/GND GND Power signal/GND. On the…
D_Dog
  • 433
  • 2
  • 12
4
votes
1 answer

What space applications use the 555 timer?

The 555 timer is considered the most famous integrated circuit of all time and is also credited with a versatile use in space travel. Hans R. Camenzind (the designer of the 555 timer) said that this IC is used for spacecrafts. However, I can't find…
Amor
  • 111
  • 1
  • 3
4
votes
1 answer

MOSFET: How can I find conduction parameter and transconductance based on graphs?

So I have my graphs (below) with various MOSFET characteristics. I don't know device dimensions or geometry, therefore I can't solve for the 2 directly with an equation. Otherwise I would just do that. That being said, any ideas on how to solve for…
Austin Brown
  • 91
  • 2
  • 6
4
votes
2 answers

Capacitor and inductor working principle

I want to know that there is opposition mechanism of current in inductor say back emf than what is opposition mechanism of voltage in capacitor ??? And also want to know that when inductor suddenly open it generates very huge voltage to keep current…
user48391
  • 41
  • 1
4
votes
2 answers

Motor that allows threaded rod to pass through

Is there a motor that can travel linearly up and down a threaded rod. I already know that you can attach a motor to the end of a threaded rod and make a nut travel along the threaded rod but this is not what I'm trying to do. For example, if the…
Jim
  • 159
  • 5
3
votes
1 answer

Is there a way to know if you're reading a 4 digit SMD resistor code upside down or not?

Sorry in advance for the dumb question. I know this is rather trivial but this issue has plagued me for sometime now. Sometimes I have an out of date schematic and will double-check on the board for the value of a resistor. And I can't tell if I…
Toasty
  • 81
  • 2
3
votes
1 answer

Why is V1 in picture outputting zero? In particular what is the role of R3?

I'm just tinkering around trying to better understand the roles of various resistors in opamp circuits and was surprised by this result.
Toasty
  • 81
  • 2
3
votes
1 answer

Transformer rectifier set. A question about the schematic diagram

This is a high voltage transformer (53kV) and rectifier that is used to power an Electrostatic Precipitator. The schematic shows a jumper between terminals H1 and H2 with a label "Remove jumper for half wave operation". Can anyone explain the…
engineer
  • 39
  • 6
1
2 3 4 5 6 7 8