[Open_electroporator] Why a flyback pulser ?

[John Griessen]

http://www.dos4ever.com/flyback/flyback.html

is a good write up of flyback transformer use.  this part from a good ways down is key:

"Finally you can check for yourself the equation derived for the output voltage of the boost converter also holds for the flyback 
converter. This is not really surprising, like in the boost converter the flyback converter is based on the dumping of the energy 
from an inductor or the primary winding of a transformer in the load. The transformer just serves to lower the voltage over the 
switch. "

The reason for dealing with the complexity of the flyback transformer instead of using
a HV switch is HV switches are expensive or unreliable+dangerous, take your pick.
A copper knife switch will do, if you like frankenstein like
laboratories...but it will wear from the arcs on it.

They make HV switches that are in a vacuum and weigh a pound and are just a relay.

Very low performance -- slow.  Would not be possible to stretch out a pulse by repeated
input switchings and the ratchet pumping effect of the HV diode.

The HV diode is cheap, since they are used in microwave ovens everywhere.  HV switches are
$75 used on ebay and $2K new.  Go figure.
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