1.5v to 450v

Sure, but what *IS* dI/dT? Like, what is its value? What controls dI/dT in your circuit?

How does dI/dT make 450 volts?

It won't make 1.5 volts into 450 volts. It could in simulation, but not in real life.

Transformer, not inductor.

Yes, that's what I said. Was there some useful info encrypted in your echo?

Well, the issue was whether an inductor, with the mystical incantation of "dI/dT", could turn 1.5 volts into 450DC.

He hired a little troll to sit there with his hammer on the switch repeating that action until the dame output cap reached maturity!

Jamie :)

The big problem here is, the op didn't specify how they wanted to handle the resulting voltage!

Was a short pulse needed? if so, then a simple collapse of a coil being drained off through a diode would generate lots of voltage.. But only for that one pulse.

If an accumulated charge was desired, then it would take a few of those cycles to charge up a cap.. etc..

But in short, magnetizing an inductor and then allowing it's collapsed energy to go wildly will do it.

This is how electronics mysteriously gets damaged from transients, load dumps etc..

Jamie

That one I can read, a bent relay!

the hard part will be choosing the right relay. it'll probably want a snubber too,

yeah.

you're limited by the contacts

On Sun, 09 Feb 2014 18:24:26 -0800, mike Gave us:

And for the last 25 years, the Navy has been using our 1.5kV @ 8mA supply for all the counters on all nuclear powered craft.

It takes more than a single cell to juice one.

However, we ALSO made a 3 Volt 15kV supply, where we upped the 3V with a simple oscillator and multiplier stages before we even used it for the HV supply! Just to get it and the control circuitry to operate.

So, the 3V powered the circuit, but the thing actually ran from 5 from the front end on.

On Sun, 09 Feb 2014 19:46:22 -0800, John Larkin Gave us:

Do you know what a collapsing magnetic field induces in an inductor, child?

On Sun, 9 Feb 2014 22:58:37 -0500, "Maynard A. Philbrook Jr." Gave us:

Yes, he did. The remarks he made inferred a no load voltage presence.

My issue didn't have anything to do with your issues.

On a sunny day (Sun, 9 Feb 2014 17:25:31 -0800 (PST)) it happened snipped-for-privacy@gmail.com wrote in :

ebay item 171023115677 DC 3V to 7KV 7000V Boost Step-up Power Module High-voltage Generator, 5$, free shipping:

ebay item 141077605344 NEW DC 4.8v-6v to 400kV Boost Step-up Power Module High-voltage Generator, 12$ free shipping:

That is an exacerbation.

I had an old circuit lying around, tried it last night. Got over 100V from 1.5V DC, standard textbook boost converter, small 47uH inductor, BC847, BAT46, large elctrolytic cap.

The NPN transistor to keep the collector capacitances low, has about 3pF output capacitance.

I exceeded the specs for both the diode and transistor and didn't dare go higher, so with careful selection of components I think you can easily get 200V from 1.5V (that's 133:1)

Cheers

Klaus

I also tried from 0.5V input voltage, to avoid leakage of the diode and transistor. Got 80V with a 1mH inductor. That's a step up of 160 :-)

Cheers

Klaus

It says 400kV is the minimum.. could be up to 600kV.

Besides, he says "I am a honest seller , Please 100% trust!"

Best regards, Spehro Pefhany

On a sunny day (Mon, 10 Feb 2014 06:56:16 -0500) it happened Spehro Pefhany wrote in :

OK, that sounds good! ;-), so I have just ordered one. Will test it, no idea yet how to measure 400 kV AC other than arc length... Any ideas?

During a University course in basic electronics, the prof would take a coil, AA battery, and knife switch. He'd close the switch and current would take some time to build in the coil, he'd then open the knife switch and draw an impressive [and rather long lasting] arc as he separated the switch, about an inch arc and BRIGHT! looked like a flash going off. His point was that lethal voltages could be in very simple circuits powered only by 1.5 Vdc.

I vaguely recall some stuff from SciAm years ago.

Here is a silly idea:

Best regards, Spehro Pefhany