dc-dc voltage step up HUGE!!!

[Lascannon]

Ok, so, stupid question, but if I wire them in serries the voltage adds, right? So If I want more voltage I can just put them in serries, right?

Thanks,
Liam.

 

[DashApple]

Hi ,


for capacitors yes in series the voltage will add up , Example - 2 160 volt rated capacitors in series would give 320 volts rating , but when capacitors are in series the value goes down so 2 160v capacitors , say they are both 100uF each at 160 volts , then the two caps would give a Cap = to 50uF at 320 Volts ,

my 600j bank is 10 caps at 160v , 3900 uF each , 5 parrallel sets of 2 in series to give a 320 volt 9000 and something uF Bank .

here is a series / parralel caulator for capacitors

Electronics 2000 | Series / Parallel Capacitor Calculator

Hope this helps , good luck : ) ( if any of my info is wrong please correct me )

Ion

 

[vk2fro]

ionlaser555:

are you using balancing resistors on your bank?

I have finally settled on 2 sets of 10 parrallel connected 450V caps in series for a total of 24mF(milli) @ 900V. Approximatly 5Kj. Should be pretty nasty. Need to buy 10 more caps, and get some balancing resistors.

 

[Mohrenberg]

More of a shocker if you use those circuits - no where near the voltage of say the average 50,000 volt tazer. Unloaded (no caps) the camera's output roughtly 600-700 volts, and for a short period before they fry themselves (transistor not up to the job).

If you shock someone with a "camera" tazer all your going to do is piss them off.

worst shock i've ever experienced was from a disposable camera discharging it's cap on me.
it left burn marks.

 

[DashApple]

ionlaser555:

are you using balancing resistors on your bank?

I have finally settled on 2 sets of 10 parrallel connected 450V caps in series for a total of 24mF(milli) @ 900V. Approximatly 5Kj. Should be pretty nasty. Need to buy 10 more caps, and get some balancing resistors.

Hi , Nope didnt have any balancing resistors with 5 sets of 2 caps i never botherd about it

 

[vk2fro]

I just ordered my copper bus bar

should have it next week. Then my bank will really begin to take shape.

I'll be starting at 450V (all in parrallel), and later order a centre bar to split the bank into a 900V one

 

[Seoul_lasers]

worst shock i've ever experienced was from a disposable camera discharging it's cap on me.
it left burn marks.

Yes the shock from a disposable camera is unpleasant and could do some damage in the right circumstances. IT certainly isn't anything like a tazer however. The tazer has a far far higher average output wattage, abeit much lower current per charge cycle but at far higher voltages. However, the shock from a large commercial camera flash unit fully charged is something entirely different. There is enough instantaneous current (~0.8-1KA) in a large flash cap to blow off fingers and or cause broken bones end result in defibrillation.
Having made my own working tazer ... a 65KV unit from plans taken from a working airtazer model I know what goes into making them.

 

[vk2fro]

Some of those commercial photographic strobe caps actually have more power than a hospital defibrillator. Scary!