7,931 reputation
11330
bio website embedinc.com/olin
location Littleton, Massachusetts
age 59
visits member for 2 years, 6 months
seen 23 hours ago

Electrical engineering consultant specializing in microcontrollers and the circuitry around them. Master of engineering in EE from Rensselaer Polytechnic Institute in 1980.

We are certified Microchip design partners, and have been in the top catagory consistantly since around 2000. Various free downloads related to developing PIC firmware and other things are available at http://www.embedinc.com/pic/dload.htm.


Aug
16
answered Is it possible to calculate the dimensions of ANY object in a picture having at some known distance an object on know dimensions?
Aug
2
comment Can a hybrid vehicle ever be more efficient than a hydrocarbon-only vehicle built with the same parts?
@Chris: I don't believe that most of the energy goes into brakes, at least not for anything other than stop-and-go city driving. Regenerative breaking and shutting down the engine instead of idling certainly help, and hybrids do them for that reason. However, none of these explain why hybrids get such good milage on the highway. Even hybrids like the Toyota Prius and the Honda Civis Hybrid still do better on the highway than in city driving.
Jul
28
comment Why it is colder in mountains, at high altitudes?
Whoever downvoted this, it would be useful to know what you think is incorrect, misleading, or badly written.
Jul
25
comment Is all of the energy dissipated in a magnetic core in the form of heat and can any of it be recovered?
The first half of your first sentence is the only thing that makes sense here. It's not clear, but the rest of the hand waving is about a perpetual motion machine at best, or more "magnetic energy" nonsense at worst.
Jul
18
answered Why it is colder in mountains, at high altitudes?
Jul
18
comment Why it is colder in mountains, at high altitudes?
The problem with your simplified explanation is that's not how it works. Gravity by itself has essentially no effect on individual molecules, and is overwhelmed by the forces from other molecules by a huge margin.
Jul
5
answered Will the current flow from the battery?
Jun
22
answered Would a linear relationship between pump speed and the flow rate from the pump be expected?
Jun
13
comment Is sunlight truly white?
Since our vision evolved to match sunlight, and "white" is a perceptual thing based on our vision, the question is actually circular.
Jun
13
answered Please give your valuable opinion in this capacitor problem!
May
30
answered Which of the following has higher resistance - milliammeter or ammeter?
May
26
comment Has infinity been observed yet?
Yes, I started counting a few years ago and I'm almost there.
May
12
answered Gravitational force in a building
May
3
comment Electric field or static electric field around a plugged-in lamp cord (when lamp is not turned on)?
@adam: That's not what the question asked about. It clearly says prior to the wall switch being turned on. But, yes, there would be a electric field around the cord, although it would go to zero in the direction where the neutral wire is in front and the hot wire in back.
May
3
answered Electric field or static electric field around a plugged-in lamp cord (when lamp is not turned on)?
Apr
20
awarded  Enthusiast
Apr
13
comment Earth curvature refraction for dummies
@David: I don't know if just the normal vertical pressure drop is enough to account for that, but together with specific atmospheric effects it sounds possible. It would help to define the geometry of your particular test case better, how high each of receiver and transmitter were locally, how high the intermediate terrain, etc. Then we can compute how much deflection is actually required to explain it. The data should be in your question. No, I'm not going to watch some video you linked to.
Apr
13
answered Earth curvature refraction for dummies
Apr
2
answered What exactly is fire?
Feb
26
comment Why is my breath hot when i open my mouth all the way, but cold if I blow like a whistle?
@rjmess: You can think of it various ways, which ultimately should lead to the same result. Viscosity is one way to think about it. Bernoulli's principle is another.