DaveE's latest activity
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DaveE reacted to Baluncore's post in the thread Undergrad How do I stretch a laser from a beam into a sheet? with
Like.
If you want a polygonal mirror, find yourself an old laser printer. Traditional laser printers have a rotating polygonal mirror with... -
DaveE reacted to sophiecentaur's post in the thread Undergrad How do I stretch a laser from a beam into a sheet? with Like.
Or a very light vibrating mirror on a pivot. Frequency wouldn't need to be exceptionally high to allow the drops to have a long...
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DaveE reacted to renormalize's post in the thread Undergrad How do I stretch a laser from a beam into a sheet? with Like.
Yes, planar-scanned lasers are often used for special-effects in movies. An example is this shot from the opening of Aliens, where a...
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Fine. "Smart enough" is not something to be worried about. Effort and interest are under-rated, very often. Better advice may more...
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DaveE replied to the thread Undergrad How do I stretch a laser from a beam into a sheet?.You could also consider scanning a 1D beam in a plane faster than your shutter speed or the rain drops. This may be easier. Something...
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DaveE replied to the thread Undergrad How do I stretch a laser from a beam into a sheet?.It would be quite unusual for a laser to be converging away from the exit. Normally the beam waist will be near the aperture, and in...
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DaveE replied to the thread Uncertainty in pursuing Engineering.Sorry, I don't have great study advice. But, these basic math subjects (Trig, Calculus) aren't just hurdles to overcome to get an EE...
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DaveE replied to the thread Undergrad How do I stretch a laser from a beam into a sheet?.Yes, most likely. Maybe two if you want 1D collimation.
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Mono Lake to Bishop, CA, 65 miles, has lots of geology. A short N-S tour here. https://en.wikipedia.org/wiki/Mono_Lake map and guide...
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DaveE reacted to Cthugha's post in the thread Undergrad Different Definitions of The Quality Factor with Like.
That is a false friend because it looks mathematically correct, but is interestingly not related to the physics at hand here. Usually...
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DaveE replied to the thread Undergrad Different Definitions of The Quality Factor.If you're an EE then it's definitely the 2nd version. The canonical quadratic form would be ##{(\frac{s}{\omega_o})}^2 +\frac{1}{Q}...
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Today I learned of the Laguna Garzon Bridge. https://en.wikipedia.org/wiki/Laguna_Garzón_Bridge. I thought it was so senseless it had...
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DaveE reacted to berkeman's post in the thread I'm trying to intuit how pull-up and pull-down resistors work with Like.
There are a couple reasons for using the "single pole / single throw" SPST switch and resistor versus a "single pole / double throw"...
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DaveE reacted to DaveC426913's post in the thread Why do we spend so little time learning grammar in college? with Like.
Isn't that what grade school is for? Why waste time in uni on the basics? Isn't that what application interviews and entrance exams are...
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DaveE reacted to Averagesupernova's post in the thread High School Analog power supply output question with Like.
Hmmm. So a bit of quick math without a schematic. Suppose you want to supply 5 volts out at 30 amps. That's within the spec right? That...
