Is there an easy way to multiply / step up DC voltage??

"Bill T"

** " Bill E. T " dark, murky and stewed.

** If Eric the Kiwi Fuckturd is what *you* were looking for - then my god are we in trouble.

......... Phil

you say => the easiest way to step up 5-12V up to 30-40KV that will cost you a fortune in diodes & capacitors, you will need about

6,000 of each

Hi Eric, I think this is spot on to what I was looking for, I guess this will be the easiest way to step up 5-12V up to 30-40kV (low current needed only) for experimental purposes?

On Mon, 10 Oct 2005 00:01:01 +1000, "Bill T" put finger to keyboard and composed:

Search for articles on electric fence controllers (Silicon Chip had such a project in July 1995), or build an automotive ignition circuit using an ignition coil, 555 timer, tuning capacitor, damper diode, and a chopper transistor. Or adapt a TV flyback transformer circuit by energising a low voltage winding (eg 6V heater) on the secondary side.

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.

Hello Andy, Yes, I will, thanks for that. Regards, John Crighton Hornsby

"Eric" = Sheep shagger extraordinaire

** Funny how 12 volt colour TV sets do it so easily.

......... Phil

Hi John, As others have mentioned, there are likely to be solutions already available for this. This is one applicaiton where there is most likely a very simple solution available (FET or relay etc), so a DC-DC converter and subsequent charging circuitry would be overkill I would have though.

Look inside many DC-DC converter apllication notes and datasheets and you'll see that often there isn't much to it, so you could duplicate the functionality with garden variety parts if you wanted. Some people still do too, for the reason you mention, they want to be able to get the parts in 20 years time. The basic devices don't have any real "magic" in them, they all operate on basic DC-DC converter topologies which were traditionally done with discrete components.

Dave :)

that makes sense, so how does a 12V colour TV set does it? Is it the same CW multiplier? Would it be easier if I actually source a broken 12V TV set then?

"Bill T"

** So you have never heard of Google ???

** You might need one that actually works if you are hell bent on electrocution.

......... Phil

The bonus with the commercial units is that they will only charge the house battery when the starting battery is fully charged. I think EA or SC did one of these as a kit many moons ago too.

For those interested in DC power supply design, the Hewlett Packard DC Power Supply Handbook circa 1978 is a good read:

Dave :)

yeah, having no luck with the search engine

"Bill T"

** Hope you have better luck with your self electrocution.

ASAP

........ Phil

If using the CW method, it will take 12 lossless cycle, so in real life it will take around 16-20 cycles, how so approx 120-160 components? But still it may cost $100+ for the components right? Is there other better methods? What is inside a 12V TV circuit? I've searched "12v portable crt tv high voltage step up circuit" with no useful results...

Worked for me...

12VDC to 10KV:

AC to DC multipliers:

10-30KV Flyback Power Supply

12VDC to 12KV

Cheers

"Martin"

** Remember, Marty - you may have the life of a total f****it on your hands.

Or an innocent child instead.

........ Phil

Hi John

What you want is an Arrid Twincharge,

These will take 8 to 15 volt and regulate to correct voltage to charge the auxilary battery. No need to worry too much about voltage drops.

David

On Mon, 10 Oct 2005 22:55:10 +1000, "Bill T" put finger to keyboard and composed:

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.

Yeah, I really should've put the comment "WARNING! Keep clear of ALL other people if building one of these" and "Death can be permanent"

I mean, if he wants to fry himself with 10 - 30KV then that's his decision. One less future Dick Smith Electronics store manager to worry about!

:-)