6,785 reputation
1029
bio website embedinc.com/olin
location Littleton, Massachusetts
age 58
visits member for 1 year, 8 months
seen 4 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.


Oct
7
comment High power short duration from low energy source?
Whoever downvoted this, it would be useful to everyone to explain what exactly you think is wrong, misleading, or badly written. Silent downvotes do this site a disservice.
Oct
7
comment High power short duration from low energy source?
I don't need anything. I'm just pointing out that this doesn't really provide what the OP asked for. The problem is that you are totally ignoring the exponential nature of the voltage and current.
Oct
7
comment High power short duration from low energy source?
You are missing the point. The OP wanted 1 kJ in 1 ms, which your example doesn't provide. He didn't say anthing about a rectangular pulse, so a exponential decay is acceptable. The problem is your numbers don't work out. 1 kV on 1 mF into 1 Ohm isn't going to deliver 1 kJ in 1 ms.
Oct
7
comment High power short duration from low energy source?
It's not that simple. Your example starts delivering 1 MW initially, but will then fall off as the capacitors discharge. Due to the falloff, you're not going to get 1000 J in 1 ms.
Oct
7
answered High power short duration from low energy source?
Oct
6
comment Capacitors and Resistors - Series or Parallel?
Your question can't be answered because the initial conditions at the time the switch is closed are not stated. For example, if both caps are charged to 12 V initially, then nothing will ever happen in this circuit, forever (for ideal parts).
Oct
6
answered What keeps water molecules in air from falling down?
Oct
4
answered Glass tends to be cold?
Sep
30
awarded  Explainer
Sep
28
revised 7 Billion people jumping at once
added 814 characters in body
Sep
28
answered 7 Billion people jumping at once
Sep
26
comment Existence of a physics-god
By bringing up god you already dragged this discussion into theology. This kind of nonsense simply doesn't belong here. -1 from me too.
Sep
25
answered Will 5 pizzas in the same Hot Bag stay warmer than 5 pizzas in 5 separate Hot Bags?
Sep
25
comment What does it mean to have two phase coherent signals at different frequencies?
You can still talk about a phase relationship between two frequencies when they have a integer ratio, such as 3:2 in your example. In that case, you assume some reference, like the positive zero crossing, in each signal.
Sep
25
answered Why is Earth's climate so stable?
Sep
25
comment The earth is spinning, so why don't we jump and land on a different location?
@Holger: As the projectile falls back down, the discrepancy between its lateral speed and the ground's lateral speed decreases again, but the discrepancy still exists until the projectile hits the ground. The west offset distance is the time-integral of this lateral velocity discrepancy. The down portion of the flight contributes the same west offset as the up portion.
Sep
25
answered The earth is spinning, so why don't we jump and land on a different location?
Sep
24
comment Can there be a string so thin as to be invisible, but that can still support a visible weight?
@bobie: I don't see the point to your edit. Your version says the same thing the original did, just using words differently. The only difference is style, not content or correctness, so should be left up to the author unless it gets in the way of clarity (which the original didn't).
Sep
24
answered Can there be a string so thin as to be invisible, but that can still support a visible weight?
Sep
16
comment If the universe is expanding, what is it expanding into?
1: Into more universe. 2: Everywhere. 3: Nobody knows. 4: Nobody knows.