DaveE's latest activity
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im cool, trust me -
I think this next generation is going to have a real struggle with reality. Or they just won't care or know to care.
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DaveE reacted to bob012345's post in the thread Undergrad A geometric puzzle: Area enclosed by three circular arcs with
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This figure is bounded by three circular arcs of equal radius R. The arcs are tangent where they meet. Find the enclosed area in terms of R. -
DaveE reacted to javisot's post in the thread Undergrad Gerard 't Hooft on the incompleteness of quantum mechanics with Like.
The only people who can resolve your question are the authors of those statements themselves. If by "complete" we mean describing...
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DaveE reacted to renormalize's post in the thread Share Animal Pictures: For Animal Lovers with Like.
At the risk of sounding like a broken record, before posting images to this thread can submitters please verify their authenticity using...
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DaveE reacted to Mayhem's post in the thread Optical Arduino-based Raman spectrometer for drug identification with Like.
Spectroscopy equipment is notoriously expensive and there's probably a reason beyond profit. At best you would be able to say "this is...
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DaveE reacted to Paul Colby's post in the thread Undergrad How Does an LED Diffuser Affect Light Transmission? with Like.
To a good approximation when light interacts with transparent plastic it’s either scattered or absorbed. Frosting is a roughening of the...
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DaveE replied to the thread Renewable Energy Sources are Making Gains.Yes. They control the power flow by matching (leading slightly) the phase of the grid. So they are always sensing it, If their...
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DaveE replied to the thread Renewable Energy Sources are Making Gains.The inverters disconnect if the grid goes down. Just like conventional roof top solar. In California, you aren't allowed to DIY these...
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DaveE replied to the thread Renewable Energy Sources are Making Gains.But is ammonia carbon free or renewable? Doesn't it nearly all come from the Haber-Bosch process and hydrocarbons? So, what is the...
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DaveE replied to the thread Undergrad Why does voltage drop become more noticeable in longer LED circuits?.Yes. Sort of. Field descriptions can get complicated. I would stick with the voltage (potential) for now. The current would be...
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DaveE reacted to berkeman's post in the thread Undergrad Why does voltage drop become more noticeable in longer LED circuits? with Like.
Yes. It's a little more complicated than that, depending on how the LEDs are driven. If they are simple LEDs each with its own series...
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TIL that Flotsam and Jetsam were not only not what I thought they were, but there are two other types: I think I'll have to hang up...
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DaveE replied to the thread Hacking of Ships.This? https://en.wikipedia.org/wiki/At_the_Abyss
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DaveE replied to the thread Help implementing LQR on rotary inverted Pendulum.If your sw is updating the step motor position frequently (not necessarily moving it, if that's not needed) and the step size is small...