--- In
Homebrew_PCBs@yahoogroups.com, Charles R Patton <charles.r.patton@...> wrote:
>
> A few other comments:
>
> First: 200uF @ 2KVusing Watt-secs or Joules = 1/2 (CV^2) gives 200
> Watt-secs.That seems like a lot of heat in a 10 mill dia 62 mill long
> hole.
Not neccessarily. Your example of wire exploding inside water needs much more energy due to water acting as coolant
Also exploding might be done in many different ways and stages.
Fo example, you could do:
1. Using high voltage source ( say 1kV, fev milliamps) to make initial spark when moving the wire trhough the PCB to background copper.
2. When that spark jumps, activate lower voltage but higher current wire to heat the spark plasma which would "eat" remainder fo the wire.
Doing things in this way would minimize requirements on the power source.
It is also probably not needed to explode the wire in PCB . One could have small tubeinto which he could gude the thin wire and explode or plasma erode it there and let the resultant mix of hot gasses flow through PCB hole so copper could get deposited.
Lightflash application you mention is interesting, but it has different requirements. Here it is not that important if flash lasts fo nanosecond or microsecond and there it was not important what happens to the copper afterwards.
.
WRT to playing with explosives I think it is stupid. You had opportunity to watch posts of the people who got wrong simple capacitance of serial configuration of equal capacitors. What do you think is going to happen when those talents start playing with explosives - or maybe you counted on natural selection to do its job and lift quality of posts ? ;o))