New answers tagged

0 votes

So even though the raw materials of semiconductors are cheap why is their cost so high and why don't we use conductor for the same job?

To produce every new successive generation of nodes and transistors, the machinery must be constantly upgraded to accommodate it. Moores LAW. Which states the amount of transistors on a microchip ...
LazyReader's user avatar
1 vote

So even though the raw materials of semiconductors are cheap why is their cost so high and why don't we use conductor for the same job?

The raw material for a semiconductor may only be sand. But sand is an insulator. It has to be processed into ultra-pure silicon. The sizes of features in a modern semiconductor are measured in ...
Simon B's user avatar
  • 224
0 votes

Smoked component on Lincoln 210 MP control board

Anyone ever replace the adjustment knobs? The plastic is broke out of them. Or where to find them
Tony Abbott's user avatar
0 votes

Is there a reason many EEE undergrad programms have a Complex Analysis Course?

These are really the basics of ONE-variable complex analysis (so complex variable, not complex variables). Of course you need to know the stuff - going beyond the first two years of physics will be ...
H A Helfgott's user avatar
1 vote

Is there a reason many EEE undergrad programms have a Complex Analysis Course?

Complex numbers come up in electronics or electrical engineering as soon as AC voltages meet inductors or capacitors. With an inductive or capacitive load, the current ends up out of phase with the ...
Simon B's user avatar
  • 224
4 votes

Is there a reason many EEE undergrad programms have a Complex Analysis Course?

The obvious examples would be the solutions to Maxwells equations for wave guides. Post WWII, MIT academics formed the opinion that Electrical and Electronics engineering was changing so fast that ...
david's user avatar
  • 633
0 votes

Pumping machine (Centrifugal ) fails to pump

You may have check the seals in housing, otherwise the pump is sucking air instead of water. Run thru a trial test in a tub/pool
LazyReader's user avatar
0 votes
Accepted

Electricity generation from sand particles in airstream hitting surface

This seems to be your question: What if we use concentrated sunlight to heat air (e.g. to 300° C) and blow that air at high speeds to fire fine sand on some surface and continuously do so to generate ...
Tiger Guy's user avatar
  • 6,544
2 votes

Electricity generation from sand particles in airstream hitting surface

The energy required to pick up and blow the filings at the surface will exceed the truly tiny amount of charge separation that this device will generate, so it is a net losing proposition. This is not ...
niels nielsen's user avatar
2 votes
Accepted

What are the issues with using a general purpose motor on a variable frequency drive?

In my experience there are three main failure modes for motors on a VFD. These modes of failure are more likely when the motor is not rated "Inverter Duty". However note that when used ...
ericnutsch's user avatar
  • 7,904

Top 50 recent answers are included