|Aug 24, 2002, 11:05 PM|
Sites on how to build your own batt ZAPPER
is searched on google but couldn't find any webpages that explaing what supplys need to zap nicad cells
anyone know or should i just leave it to the pros
i love getting shocked
|Aug 25, 2002, 08:49 PM|
so am i correct to assume you charge up a large farred capisiter or two or three or four
with 110 house voltage>
hook + to + and - to -
i have lineman's gloves
i was thinking of climbing up to utility pole and zapping them right off the transformer
or mabye before
not really but i still want to try it out
i could only find one sight by searching the ezone but that didn't go into any detail
when i was in auto shop in high school we had a working display of a distributer cap. Our instructer at that time dared us to touch the live main feed. Every student just touched and jumped
me on the other hand pinched the cap an stood there as my right side twich uncontrolbly -about 7 seconds after i let go i had spasims-twiches all down my sholder
THAT WAS FUN
so i am assuming there arn;'t many sites because of the inherant dangeer?
|Aug 25, 2002, 09:10 PM|
A distributor cap isn't that dangerous. It sparks, but can't deliver real amps.
A charged capacitor though, doesn't have *ANY* form of current-limiting.
Very low internal resistance to limit current. It can discharge it's charge in micro/nanoseconds resulting in *VERY* high (mega)amps.
When combining caps with high voltage, be careful.
A site (not related to zapping), but dealing with high voltage/currents :
Their flyback-HV supply design is nice to build yourself. No dangerous currents there, but some nice sparks.
I think, with a HV-supply and cascade from a TV, connected to some high-voltage, low ESR caps, you could do some serious zapping (not only cells ) - and damage...
All I can say is : be careful
|Aug 25, 2002, 11:10 PM|
The kind of capacitors you will need will be around the size of your forearm ... 2" dia and around 6" or more long, and many of them.
As NightSwan said, these caps have very low internal resistances, and when your connecting so many caps together in parallel, the internal resistance is even lower, serious currents will be flowing. This will give you one hell of a boot if you touch them. Serious injuries or death.
I've heard that there is also the the danger of the Cells exploding ... another reson to leave it to those that are experienced with the right equipment and protection.
oops, thats reason, not 'reson'
|Aug 25, 2002, 11:45 PM|
You need about 70,000 uf worth of caps intended for switching power supplies at between 60 and 80 volts plus a really big SCR that will handle the 5000+ amps when you discharge the caps into the cell.
|Aug 26, 2002, 12:15 AM|
Speaking of cell zapping, can they perform this after a battery has been used a few times? Or does it have to be done before it's ever been charged?
|Aug 26, 2002, 12:23 AM|
what is an SCR -are you talking about an battery(xxxxscr)
I can get ahold of the caps and will make a lexan(plexyglass) enclosure to gaurd against burst or explosion
is that the way r/c companies do it?
i was thinking of a triggering device similar to a geuaten-you know the thing that cuts of heads
the battery would sit upright with the negitive grounded to a copper plate and some type of relese that completes the circut when a string is pulled or mabye even when a servo is retracted
it's not the building of the zapper i am worried about
it's how much juice to put into them
so you don't zap them at 12 volts?
you can email me on the side if you are scared of other morons like me killing myself firstname.lastname@example.org
i hate this life anyway -
|Aug 26, 2002, 01:30 AM|
From memory its done at high voltages, from 70 to 100volts or something, caps at this voltage rating(you really should use caps rated 50% more than the working voltage) and high capacities in the 10's and 100's of thousand uF are very expensive, it would probably be cheaper buying many packs of pre-zapped cells.
A SCR is a silicon-controlled rectifier or Thyristor, a solid state switch, kinda like the mosfet's used in ESC's in that they have a gate and when the gate is activated they allow current flow.
You could try finding a FET rated at many thousands of amps, but good luck with that one.
A mechanical Switch type method is just likely to weld the contacts together, no matter how big you make it.
Yes I've also heard that 600ae's don't benefit from zapping.
hmmm, makes more sense if I put 'thousand' in there
|Aug 26, 2002, 09:28 AM|
If you can't put together a zapper based on the info Steve gave you probably shouldn't be thinking about making one.
600AE have not benefit from zapping, anyone buying such a zapped 600AE would be wasting their money.
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