Engineering Stack Exchange
Engineering Stack Exchange

Most Popular

more tags
1500 questions
9
votes
3 answers

What are the differences between linear and low-dropout (LDO) regulators?

At a high level both a linear and LDO regulators appear to be the same. Most block diagrams appear to be the same too. Most of the device packages are three terminal packages. What are the differences between linear and LDO regulators?
706Astor
  • 1,064
  • 1
  • 8
  • 19
9
votes
1 answer

Stainless steel corrosion resistance in seawater

Stainless steel comes in several qualities. AISI 303 (1.4305) (Stainless Steel A1) approximately 304 but more machinable due to sulfur. AISI 304 (1.4301) (Stainless Steel A2) comprises of 18% chromium and 8% nickel. AISI 316 (EN 1.4401) (Stainless…
Walter
  • 427
  • 2
  • 6
9
votes
4 answers

Humidity in home is much higher than outside

We have a two year-old, two-story town house with: fiberglass insulation in the walls; a Tyvek vapor barrier under foam board on the exterior walls; blown cellulose insulation in the attic; stucco outside; and a refrigeration cycle air…
Takala
  • 387
  • 1
  • 3
  • 21
9
votes
1 answer

Moving carbon nanotube in a magnetic field

When a metal wire moves across a magnetic field, voltage is induced across it, which is equal to $BLV$, where $B$ is strength of magnetic field, $L$ is the length of wire and $V$ is its velocity. Will a carbon nanotube also exhibit this phenomenon?…
qwe
  • 91
  • 2
9
votes
1 answer

Involute gear curve when root diameter falls below base diameter

The answer to a question on involute gear curve calculations shows how the gear tooth curve proceeds as an involute calculation from the base diameter. If the pitch diameter is D = m.N where N is the number of teeth and m is the modulus (for metric…
carveone
  • 347
  • 4
  • 9
9
votes
5 answers

Why is "regular" gasoline standard instead of something more knock-resistant?

The standard light petroleum distillate for vehicle engines, "regular gasoline," is (or is equivalent to) some mix of heptane (C7) and octane (C8). Higher proportions of C8 are more knock-resistant, which allow for higher compression ratios and…
feetwet
  • 1,757
  • 2
  • 15
  • 41
9
votes
1 answer

What is the difference between Bluetooth Low Energy and Bluetooth BR/EDR in Park mode?

It is known that Bluetooth Low Energy transmits data only during short time intervals called Connection Events. Connection events occur regullary with predefined period. The rest of the time Bluetooth LE device is does not transmit nor receive data.…
user1558573
  • 191
  • 1
  • 2
9
votes
1 answer

What kind of ship is this?

I've recently been on Rügen and I have seen this: Does anybody have an idea what this is? (To give Google a chance: A ship with four "towers" made out of steel on it. They looks a bit like high-voltage electrical towers.)
Martin Thoma
  • 813
  • 3
  • 8
  • 21
9
votes
4 answers

How does load force impact load inertia?

I am trying to simulate a winch as a speed-regulated motor that works through a gearbox to lift a mass. The output of the gearbox is a drum, which rotates to accumulate cable. I feel comfortable converting the mass to a moment of inertia and I also…
Chuck
  • 3,565
  • 13
  • 30
9
votes
2 answers

Writing a filtered derivative term of the PID controller into the C++ code

Everywhere I look, be it a PID, lead, lag control or anything else, there are Simulink schematics with transfer functions. This is all nice for system response simulation, however currently I have to implement a PID control with a filtered…
bluecore
  • 101
  • 1
  • 6
8
votes
2 answers

General solution for the most critical pattern of live loading

From ASCE 7-05 code: ASCE 7-05 Section 4.6 states "The full intensity of the appropriately reduced live load applied only to a portion of a structure or member shall be accounted for if it produces a more unfavorable effect than the same…
Graviton
  • 1,264
  • 2
  • 18
  • 40
8
votes
1 answer

CE Marking on low budgets: conforming to EMI / EMC requirements in ELV and mains circuits

For one-off, bespoke electronic products, or ventures on low budgets, what is the cheapest way of ensuring the product conforms to EMI/EMC requirements of CE marking? This can be at design time and / or throughout the manufacturing…
Jodes
  • 1,304
  • 1
  • 12
  • 34
8
votes
0 answers

Incompressible 2D pressure-driven flow: for Navier-Stokes equations in nondimensional form, how should I express pressure boundary conditions?

*I have updated this question. I'm using two codes for modeling incompressible, two-dimensional flow out of a tank. My fluid dynamics experience is pretty basic; I'm using the codes to understand a chemical process. The codes haven't been used…
Ant
  • 245
  • 1
  • 5
8
votes
2 answers

Vertical wave action on bridge

Rio de Janeiro, Brazil is currently stunned by the fact that yesterday a span of a brand new (innaugurated in January) bicycle bridge along the coast collapsed when struck by a wave, killing some people that were on it at the time. A few videos have…
Wasabi
  • 13,077
  • 8
  • 36
  • 61
8
votes
3 answers

Tolerance for Beam With Cope End

I need to have some beams fabricated with copes on the ends. They will be set on top of existing steel trusses, and used to replace undersized purlins to shore up existing rafters (hence the need for the copes). My structural engineer specified 4"…
alfreema
  • 353
  • 3
  • 12
1 2 3
…
99 100