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27 votes

What would "wired houses" refer to in 1928?

See this article: Digital History: The Rise of Hollywood and the Arrival of Sound. It refers repeatedly to "movie houses", and uses the term "wired for sound". these are certainly ...
Jonathan R Swift's user avatar
23 votes
Accepted

Extending USB cable makes it not work

Even aside from the fact that no outer sheath and no shielding makes me cringe, there are a couple of big issues with your custom cable: The data lines (pins 2 and 3) need to be a twisted pair. ...
Austin Hemmelgarn's user avatar
23 votes

Extending USB cable makes it not work

The most prosaic reason why your cable doesn't work and is drawing too much current is that you connected he wrong pairs of pins and/or some of the the wires are shorted together. If that is not the ...
alephzero's user avatar
  • 12.5k
14 votes

What would "wired houses" refer to in 1928?

they mean wired for sound. Previously movies were accompanied by a pianist or organ player.
Tiger Guy's user avatar
  • 6,979
5 votes

Extending USB cable makes it not work

For the USB signal, you have to make a 90 Ohm characteristic impedance twisted pair. The characteristic impedance depends on the insulator and on the outer/core diameter ratio of the wires. Search ...
Fabrice Pardo's user avatar
3 votes

How to manage real-world too-long data cables?

Sorry, but the answer is "don't." When you use cables greater than (or even close to) the max rated length for a given comms protocol, you are asking for glitches and failures to occur. ...
Carl Witthoft's user avatar
3 votes

Extending USB cable makes it not work

The device is likely not getting the power it needs. Use a thicker wire to ensure the resistance is the same as the original. Don't make an induction coil with your cable. It also helps to use ...
Abel's user avatar
  • 1,352
2 votes

Is there well known equation (formula) to calculate maximum practical current which copper wire of fixed diameter can handle

For whatever reason standards bodies seem to prefer to give a tabulated list of values without giving any rationale to how those figures were obtained. I once tried to do some first-principles ...
Peter Green's user avatar
2 votes

Is there well known equation (formula) to calculate maximum practical current which copper wire of fixed diameter can handle

There are tables by various standards authorities which give current ratings for various wire gauges based on their insulation, bundling, free-air, conduit, etc. If you find one of those and plot the ...
Transistor's user avatar
  • 10.9k
2 votes
Accepted

What is the less ductile and thinnest wire material?

For microscopic electrical probe pins, gold-plated tungsten is used because its stiffness modulus is large- which provides best resistance against buckling under compressive stress.
niels nielsen's user avatar
2 votes

How to manage real-world too-long data cables?

As mentioned, there is no "proper" way (proper is to keep cables short - shorter cables are generally cheaper too!). You can however do a careful bundle that looks like the 8 or infinity ...
Abel's user avatar
  • 1,352
1 vote

Lead Cladding on Telephony (landline) copper cables. Any other early industrializers with this problem?

Since you mention the Model T Ford in regards to vulcanized rubber, I'm using the 1920s as a reference period. Various newspaper articles give the price of lead in London from 1913 to 1925 and for ...
Fred's user avatar
  • 9,702
1 vote

Minimum drum wall thickness when rope wrapped around it

if you cut the drum longitudinally into two half-cylinders you will have 10 cut ropes with a tension of 200kN. Let's say the center to center distance of each rope is L inches (moderately small WRT. ...
kamran's user avatar
  • 22.5k
1 vote

What is the white fiber in the copper wire of headphones?

Those fibers are also commonly used to color-code the wires so you will not confuse them when you strip off the insulation, and wire up your device backwards.
niels nielsen's user avatar
1 vote

What is the white fiber in the copper wire of headphones?

The fibre is usually the first part of the cable making process, as it forms the support for adding further components as the thin signal cables need the fibre support.
Solar Mike's user avatar
  • 15.9k
1 vote
Accepted

How can thin wire in generator windings carry the high output current?

My question was based on an appearance that the thin winding wire seemed to violate the laws of physics, so there might be some other factors at play. Neil_UK answers this in generator coils: max ...
fixer1234's user avatar
  • 146
1 vote

How can thin wire in generator windings carry the high output current?

Note: Small Gauge mean the wire can carry a significant amount of current. Example per the attach AWG 4-5 can carry 100A. There are lot other factors need to be considered before selecting a wire. ...
Mahendra Gunawardena's user avatar
1 vote

What's the difference between thermocouple grade and extension grade wire?

Introduction Thermocouple Wire that is used in a thermocouple from the point of sensing to the point of cold junction compensation (cjc end) where the signal is measured. A thermocouple is a sensor ...
Brad's user avatar
  • 318

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