Donald Smith Devices too good to be true

[mr.clean]

Good new spreads fast. Try not to get overwhelmed. If you share the specs or source on the toroids I will go ahead and order them today.

ok well..... they are gonna hate me but .....i got these toroids from....

DIGIKEYYYYYYyyyyyy-- digikey#495-3845-ND

i scored them with my dremel cutting wheel and put the one hemisphere in a towel and vice to snap with rubber hammer, just keep in mind,

...any toroid would do as long as you can get the windings on easily (mine is wrapped all wrong and Very hasty lol ) it would be fine to use flybacks

...and it has a high power capability.. and i think it could be way better with even thicker alternate flux paths

i just dont want to mislead anyone, but there are no tricks,
the battery can be removed as in 5:18 and actually i think it is necessary to have the caps hooked up and one free end with wire unconnected, almost antenna -like.
...that was how i could revive it, by just fiddling around with touching that free end, and dis/ reconnecting the output wire, "some" sort of charge builds up, and experimenting would show if i touch the cap free end wire to complete circuit, the ammeter dips 5 amps off the scale NEGATIVE for a significant time before reaching zero very wierd

[LaserSaber]

So just use large ferrite toroids with a permeability of around 2000? Do you have the specs on the ones you ordered?

[mr.clean]

So just use large ferrite toroids with a permeability of around 2000? Do you have the specs on the ones you ordered?

digikey #495-3845-ND relative initial perm of 4200

[LaserSaber]

Sorry I missed that. Thanks! I am ordering now.

[LaserSaber]

Ordered! I look forward to trying to replicate. Have you shown the driver circuit somewhere in the thread? I may just need to go back and read all the pages here. I may try building over the weekend with parts on hand. I know from past experience this is never as easy as it looks. I get tons of e-mail from very smart people who for some reason cannot even get the SJR3 circuit working. I have been there myself many times so I totally understand.

[T-1000]

digikey #495-3845-ND

http://media.digikey.com/pdf/Data%20...0A0084X830.pdf

[janost]

Your first question: the secondary coil (say originally it gives any voltage between 5V and 24V AC from its 230V primary) normally has some ten mH self inductance and this comes in series with the several Henry primary coil of the first transformer so the detuning effect is really negligible. And if you load the primary coil of this series secondary, then the detuning is also negligible.
Your 2nd question: yes if you short or heavily load the secondary of the first transformer, then the primary voltage of the second transformer will go high indeed so be very careful. Current transformers also should be operated with a load across its (output) primary coils and if load is removed the primary voltage may go up very high to cause trouble in insulation.

On your transistor-controlled secondary and feedback loop idea: yes it sounds feasable but first I think you may wish to see if it was worth doing.

Gyula

Before I do anything like that I have to put together an isolation-transformer.
I will not connect a circuit like that straight on live-power.

I already use non X or Y classified caps straight across wall-power but I guess if there is a strikethru there will just be a loud bang or the circuitbreaker will trip over.

But connecting live-power on a transformer wired backwards is not my kind of fun.
The circuitbreaker wont trip immediatly and before it does there will be over 2Kv on the other end of the transformer with sparks and fire.

I'll just start with manually adjusting the load to get into resonance

[gyula]

Hi janost,

Yes I agree on using a 1:1 isolation transformer for the mains and drive the circuit variants from it. The current transformer should always have a suitable load across its output (which is its original primary coil).
Be very careful and take care.

Gyula

[mr.clean]

Ordered! I look forward to trying to replicate. Have you shown the driver circuit somewhere in the thread? I may just need to go back and read all the pages here. I may try building over the weekend with parts on hand. I know from past experience this is never as easy as it looks. I get tons of e-mail from very smart people who for some reason cannot even get the SJR3 circuit working. I have been there myself many times so I totally understand.

yeah i love your stuff, i build your SJR, its brilliant. just matters if you hookup the top wire or bottom wire of either coil, maybe thats where they failed

here is the driver schematic im using DIY Homemade Ignition Coil Driver - RMCybernetics
and DIY Homemade Signal Generator with Pulse Width Modulation - RMCybernetics

[janost]

Hi janost,

Yes I agree on using a 1:1 isolation transformer for the mains and drive the circuit variants from it. The current transformer should always have a suitable load across its output (which is its original primary coil).
Be very careful and take care.

Gyula

A 1:1 isolation transformer is easy to build from 2 back to back line transformer.

it can still kill you but you have the benefit of current limiting, it wont start a fire.

[verpies]

Dear Mr.Clean

Let's draw a decent schematic diagram of your device.
Here is a start...

Let me know what needs to be added and corrected.


For example:
1) What are the turn counts of windings W1, W2 and W3 ?
2) What else is connected to the transformer (e.g. the load) ?
3) Is the frequency, shape and duty cycle of the waveform feeding the R1 correct?
4) Is the +12V power supply voltage correct ?
5) Where is it looped ?
6) Are the diode and transistor part numbers correct ?
7) Are the values of the resistors and capacitors correct ?
8) What else is missing...?

[LaserSaber]

Thanks for the links. So the ignition coil listed as TR1 is where you put the Bitoroid? Did you replace the ignition coil with the Bitoroid?

[LaserSaber]

@verpies

Thanks for doing the drawing. that give us a great reference. Is the bulb connected at C1 or C2? I have never built a Bitoroid.

[ewizard]

congrats again mr. clean!!! Glad to see everyone else here as jazzed as you. One question on the toroids. Am I correct that you need 3 of them? In your previous video I saw 3 but it looked like only two were hooked up. Sorry I haven't caught up on reading here if it was mentioned before but I'm looking right now on getting a couple of them (or 3 if needed).

[penno64]

Gentlemen,

Patience - all in good time

Please resist from overwhelming Kurt (mrclean)

The last thing we need is another Romero!

Regards, Penno