Capacitor Defibulator

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Frosty_47

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Hello, I would like an opinion regarding my design of capacitor defibulator. I have two primairy designs that I am dissputing at the moment.

This first design has max output voltage @ 1200Vdc
**broken link removed**

The second design has max output voltage @ 1600Vdc
**broken link removed**

Both Circuits can store around 4000 Joules of energy at their ratted voltage. The zenner diodes protect the caps from over voltage. Resistor R is current limitting resistor. My load will vary, but it will be a short most of the time...
 
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Mikebits said:
Do you mean defibrillator? What would be your reason to build such a thing?
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Yes, please excuse my spelling. Defibrillator can be used to have lots of fun. I.e. exploding soda cans, vegetables and small capacitors. Lunching non-ferous objects into the air. Shooting iron nails with a coilgun (a.k.a. railgun). The possibilities are only limitted to creativity...
 
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That's a relief, I was thinking for a second that you were planning to design and use an unapproved piece of medical equipment; if you lived somewhere like Vietnam then I might have thought you'd do it but not in Canada.
 
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Hero999 said:
That's a relief, I was thinking for a second that you were planning to design and use an unapproved piece of medical equipment; if you lived somewhere like Vietnam then I might have thought you'd do it but not in Canada.
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LOL!

I bet Northern Vietnam has better healthcare than Canada.

But w/e. What do you think about the circuit itself ? Should I proceed with 1200V or 1600V design ?
 
Cuba has good healthcare too, both are socialist countries - still doesn't beat our NHS though.

I don't see any reason why you shouldn't go for the 1600V design. What are you using as a switch?
 
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Hero999 said:
Cuba has good healthcare too, both are socialist countries - still doesn't beat our NHS though.

I don't see any reason why you shouldn't go for the 1600V design. What are you using as a switch?
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Thanks. I dunno yet. I am yet to pick a switch.

The concern I have is that at 1600V and such high energy, the in-rush current might be too large. My main concerns are safety at this point. It would be very painful to be around those caps in-case of explosion.
 
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Frosty_47 said:
My main concerns are safety at this point. It would be very painful to be around those caps in-case of explosion.
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I think I have a nominee for the Darwin Award! If you have to ask about that circuit...you shouldn't be doing it!

Explosion would be the least of my worries. A standard external defibrillator (medical) uses only "one" 16µF cap at that voltage...and it can really, really kill you.

I choose not to be named in any law suits resulting from the demise of Frosty_47.

Ken
 

LOL!

But considering the fact that I have such high capacitance, wouldn't the unit start your heart again (assuming you die from the discharge). So it's like you get killed and than brought back to life in an instant . Sounds like a new kind of fun! w00t-w00t!
 
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OMG --that is probably the first time I have written that in a forum.

You have my vote just for expressing such an ignorant thing.

John
 

It doesn't matter how many capacitors you stick in series, the discharge current will be the same as the ESR and ESL of the capacitors adds together.
 
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