5,951 reputation
825
bio website embedinc.com/olin
location Littleton, Massachusetts
age 58
visits member for 1 year, 6 months
seen 1 hour 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.


17h
comment Who does work while walking?
@Ben: Yes the ground doesn't do any work. However, the muscles do work to push that center of mass against gravity. If this weren't true, you'd be doing no work by standing up on tiptoes starting with feet flatly on the ground. You'd be doing no work going up stairs either, since the steps are only providing a force. Your concept doesn't work.
1d
comment Can I throw a stone through my window without breaking the glass?
@Roger: No, to a confidence level of 0. followed by a lot of 9s. Something the mass of a "tiny stone" tunneling thru something the thickness of even the thinnest plausible window glass is so astronomically small as to be impossible with a certainty well beyond plenty of other things we consider "certain" without question. So basically "no".
1d
answered Who does work while walking?
1d
comment Electricity Problem
There are so many reasons to close this, it's hard to decide which one to pick. I guess I'll go with the lazy homework one.
2d
comment Why does frequency increase as the length of an open air column shortens?
Basically shorter wavelengths make higher frequencies. How is this not obvious?
2d
comment Why there is a time gap between the news presenter and the field reporter?
Because the video of the reporter's lips and the audio of his speech are tied together and any delay in transmission and relaying affects both the same. Same reason you can watch a movie decades after it was made, but the audio is still in sync with the picture. This really should be obvious.
2d
answered Is the physical design of the human beings the best possible?
Aug
26
answered Is Rosehip Syrup boiling in a bottle?
Aug
26
comment How to measure the energy consumption class of a home appliance?
Clever idea, but a long way to go to avoid buying or borrowing a $20 power meter. Calorimetry will tell you real power, but I don't see a easy way to measure power factor.
Aug
26
answered How to measure the energy consumption class of a home appliance?
Aug
26
answered Why is Lightning referred to as High frequency source?
Aug
25
comment Branching lemon drop “smoke rings”
@Bern: No, I haven't done any of the math. I agree that the smoke rings are a laminar process, which eventually break apart due to becoming turbulent. The Reynolds number should give some guidance on when that is likely to happen.
Aug
25
answered Branching lemon drop “smoke rings”
Aug
25
comment Circular motion - is average velocity enough to tell?
The average velocity of anything moving in a circle is zero, so no, that won't be helpful. Perhaps you mean average speed?
Aug
25
comment How can I calculate the center of an object relative to a focal point and a moving observer?
@ja72: Oops, thanks for catching that. Fixed.
Aug
25
revised How can I calculate the center of an object relative to a focal point and a moving observer?
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Aug
25
revised How can I calculate the center of an object relative to a focal point and a moving observer?
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Aug
25
revised How can I calculate the center of an object relative to a focal point and a moving observer?
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Aug
25
answered How can I calculate the center of an object relative to a focal point and a moving observer?
Aug
24
answered Electrical Analog of a Chain of Springs