DaveE's latest activity

So for an x-y plotter, you have two main ways to move the pen. The first uses a moving x-arm and a way to move the pen along that arm...

Just saying hello and look forward to sharing knowledge and ideas on the forum!

I have demonstrated that it is. What is "exactly three equilateral triangles"? Even that requires lot of assumptions. You made them...

That's my point. Ambiguity leads to subjective intepretation. Yup. That's an interpretation. Yup. So is that. Yes. Which would still...

I won't be able to read this until tomorrow, sorry, nor use my battery. The Li On will sleep tonight.

Maybe a flange with a soft metal gasket, like Indium? IDK, maybe it would melt (157oC). Maybe you would want it to melt, like solder...

eBay, maybe inside a broken laser. A-O QS is the way to go like this one. They are driven from a gated HF source (80MHz, maybe 5W...

I'd been thinking of buying a new charger and batteries for AA devices. Looking online, it doesn't appear that any major manufacturer...

Cheap. They put energy into skin with the precision requirements of a doctor. In the mid 1980's I worked on a 532nm Q-Switched laser...

Could you use the valves temporarily to seal the vessel long enough to remove the plumbing and replace it with a mechanical seal, like a...

Because cgs sucks? Sorry, JMHO. STEM students need to know about unit conversions, which they will do while they are cursing the authors...

Especially in contrast to Hydrogen, Helium is very inert - it is the most inert element. It's two electrons exactly fill the 1s2 shell...

What you have there is half of an "H-bridge". The "To Load" terminals should be tied together, and connected to one side of the load...

OK, I guess I'm only buying name brand batteries now. Lumafield makes CT scanners for industrial engineering and production testing...

A few thoughts... 20MPa is not exceptional. E.g. 20MPa is the tension in a 1mm diameter vertical string with 1.6kg hanging from it...