DaveE's latest activity

Strict moderation is rare because it takes a lot of effort* and reduces user engagement. What self-respecting capitalist CEO/investor...

This is what is known as open delta. Look around in small industrial neighborhoods in North America. You will see a large transformer...

The HF switching noise can be easily filtered, if they want to. In many motor drives users don't care enough to pay for that.

A 3PH supply is just three single phase lines relative to neutral, the phase differences are 120°. The phase voltage, is the voltage...

People routinely use the phrases "no force", "zero force", "no net force", "zero net force" interchangeably so those are, within the...

Why circles? If the mirrors are rectangular, lay them out in a rectangular grid. You only need to place accurately calculated shim...

This sounds like a safety critical application. If so, I like the latching relay idea. You need one non-volatile memory bit that can...

That suggests using a latching relay.

Get a couple more quotes/estimates.

It's not lame, it's real life these days. But this seems to be the active joke thread so...

As you say, a reflector would be needed and not a lens, which can work on tree stumps (low down). Burning a section of a tree would...

Just hire a tree guy, dude. Your concave mirror isn't an antigravity device, pieces will still fall, but in a much less controlled...

But in this case we are talking about sources of radio emission that a person cannot see, and a radio telescope does not care whether it...

I understand now. Thank you!

It doesn't even specify it's a string. Hence my previous comments. This is 99% simple trigonometry and 1% physics. We've done the math...