Otto`s replication of Steven Mark`s TPU

[dutchy1966]

@ Otto,

First i wish to say: congratulations as being the first to replicate SM's methods!

You mentioned to build oscillators together as a team. Very good idea!
Is the oscillator you publiced (the scanned picture from a little while ago good enough for this?
If so, I suggest we all adopt that design.

Please let us know as soon as you can. We can then start building oscillators.....

Regards

Robert

[MeggerMan]

Hi Roberto,

Well done!
When you say you have "I did it" does that mean you have over-unity?
I can't wait to see your results....

Hi Otto,

I am currently going as quick as I can to build up a cheap high spec. oscillator module based on the DDS chip AD9833.
Its a surface mount device 0.5mm pin MSOP package.
The triangle output from the AD9833 is coupled to a high speed comparator AD8611 and allows you to set a duty cycle.
http://www.edn.com/article/CA324406.html
(scroll down to DDS implementation)

The comparator then feeds a mosfet driver UCC37324 (dual 4 Amp).
http://focus.ti.com/docs/prod/folders/print/ucc37324.html

The driver then feeds your mosfet like IRF3707. (50A 30V).
http://www.irf.com/product-info/datasheets/data/irf3707.pdf

But maybe a higher voltage mosfet may be needed.

The fequency selection on the AD9833 is done using a PIC chip.
I have all the parts except the 25 Mhz crystal oscillator module and the AD8611.
I may have to use a surface mount crystal oscillator device that has no steel can. Because the whole board is going inside the TPU, only the PIC controller is on the outside.

SM must have used DDS for stability,size and sheer simplicity.

Regards

Rob

[Earl]

Hi Otto,

bin in Elektronik seit 40+ Jahren und ich habe einfache, billige, stabile
und sehr gute Oszillatoren. Mit und ohne synchronizierung.

Sagts mir bitte was Du fuer 3 Frequenzen haben moechtest?
Denn hast Du sofort die Schaltungen.

Veroeffentlichen werde ich zuerst nur fuer nicht synchron.
Auch werde ich Sofort-Stop dabei haben, die eventuel als Puls-Schlucker -
um Asgangs-Leistung zu reduzieren - funktionieren koennte.

Gruesse, Earl

Uuupps, I am in an English forum, so here is the English

I have been in the electronic industry since 40+ years and I have simple, cheap, stable, and high-quality oscillators, with and without synchronization.

Please tell me what 3 frequencies that you want, and you will immediately have the desired circuits.

In public, I will only give out circuits for non synchronous operation, at the beginning.  My circuits will also include an instant STOP input, which could eventually be used also as a pulse-swallower - to reduce output power - or as an ON/OFF switch.

Regards, Earl

Hello all,

I forgot, sorry.

Lets be clever:

Let us together built 3 oscillators that are able to drive our TPUs. In this way the 50 turns test cant anymore be a fail and ONLY in this way we can easily drive our TPUs and in this way we ALL have success.

Lets first find on the net a oscillator that is cheap, easy to built......

I have such oscillators but they are complicated to built.....profi version.

I hope you agree with me.

I INSIST in the 1. time on NOT SYNCHRONISED FREQUENCIES!!! I INSIST!!!!

This TPU biest can easily kill you!!!! With not synchronised 3 frequencies is the danger very big but you maybe have the chance to survive.

Dont even think Im wrighting crap!!!! I exact know what we have and you cant even imagine.

Otto

[Earl]

Otto, here are the Moebius strips, but I don't know how to connect them.

Please tell me how to connect the red and blue wires between each Moebius and also to the zero and phase?

Hier sind die Moebius Strippen, aber ich weiss nicht wie man die verbindet.

Bitte mir sagen wie die rote und blaue Draehte zu verbinden sind sowie die Verbindungen zum zero und phase?

Regards, Earl

[gn0stik]

Roberto. Otto, thank you for all your hard work.

I'm very anxiously awaiting your docs roberto, I'm sure they'll be fantastic.

Regards,
Rich