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Author Topic: Akula0083 30 Watt Self Running Generator.  (Read 1269743 times)

Thestone

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1035 on: May 01, 2014, 04:06:48 AM »
Hi All,
Updated values ​​on the schematic diagram components Akula0083-disassembled. . .

Sorry I was traveling, I found this on the web, very similar to these other schematics... so we maybe closed to it.

The Stone.

TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1036 on: May 01, 2014, 04:58:45 AM »
Hi All,

I was looking at the TL494IN Chip again and some data on it is interesting:
                                               MIN           MAX         UNIT
fOSC     Oscillator frequency       1              300           kHz
CT        Timing capacitor            0.47          10000       nF
RT        Timing resistor              1.8            500           kΩ

Pin 5 is the Timing Capacitor Pin. Pin 6 is the Timing Resistor Pin. Akula has uses a 10K and a 20K Pots and I cant quite read the Capacitor Values. I have guessed them to be 2.2pf and 8.2pf but looking at the sheet, this may be wrong.

I guess the point is, Akula has half the Pot value from one TL494IN to the other which supports the idea that he was looking for the Phase Shifted Frequency we have previously spoken about. See Picture Below:

All the Best

  Chris
PLEASE go back up and re-scale your images! 1024 pixels wide at most!
IrfanView is great but has a learning curve. The Gimp is also free and is nearly PhotoShop and is easy to use.

The TL494 is rated to 300 kHz but is actually capable of stable operation at much higher frequencies, if you get genuine Texas Instruments chips. I have used them at 800 kHz in an SSTC TinselKoil 2.0,  but had to boost the output with a driver stage.


tysb3

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1037 on: May 01, 2014, 05:22:40 AM »
@ AlI

one more possibility how to find core resonance:

http://realstrannik.ru/media/kunena/attachments/6159/opredelenie_MR.pdf

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1038 on: May 01, 2014, 05:45:44 AM »
PLEASE go back up and re-scale your images! 1024 pixels wide at most!

@All - Very Sorry! I have done some already but I don't have access to the others. I have asked Stefan to delete them. Yup... Feeling like a Goose!   :-[

All the Best

  Chris

havuhung

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1039 on: May 01, 2014, 05:50:18 AM »
Hi All,
Thanks for the nice circuit diagram of people.

I explore the actual components on the circuit board Akula0083-Lantern No3-Disassembly Video: Noticed that two capacitors is the type commonly used in consumer electronics Polyester Film Capacitor, compared with the actual size of the are capacitors on the printed circuit board of the CRT monitor. Value capacitors with the size of it. I believe is similar to the hand-drawn circuit diagrams, and that value is 2.2nF and 8.2nF approximate.
Well, thank Mr Akula0083 shared and all your work.

Regards

MenofFather

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1040 on: May 01, 2014, 10:13:38 AM »
Hey All,

Fantastic Work from everyone!

Few minor things I have noticed so I thought I would have a go at some drawing! I am new in Eagle so go easy! But, I want to point out there are some circuit inconsistencies with the last few circuits that have been posted.

The closest circuit I have seen is below posted from 'havuhung ' The hand drawn schematic that may be one of Akula's or a well drawn copy of the original board.

I have used Eagle to Re-Draw this hand drawn Schematic. I am asking you guys to check the schematics and point out any errors.

Once proofed, I will post the Eagle Files.

All the Best

  Chris
Then ask Akula about schematic in conference, he say, that give schematic, but letter say somthinglke that, why need shematic? Here two generators, can be any generators, not TL494.

MenofFather

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1041 on: May 01, 2014, 10:19:56 AM »

It appears if the Max Frequency the TL494IN can handle is 300 kHz according to the datasheet. Or have I read this wrong?

Max frenquency is 800 kiloherc. Low frenquency of Akula lantern have 50 precent duty cycle, that say Akula.

MenofFather

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1042 on: May 01, 2014, 10:23:45 AM »
Hi All,

Thus far the TL494IN Chip is only good to 300KHz.

Anyone want to check and verify this?

All the Best

  Chris
I  have verifed, maxmum frenquency 700-800 kiloherc. Not meter IN or not IN, they work same.

MenofFather

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1043 on: May 01, 2014, 10:27:24 AM »
Hi All,

Apologies, mistake and move around of the Tags.

All the Best

  Chris
D1-D4 better use shotkey diodes, for example 60 volts 1-3 amps. Because shotkeys open after 0.3-0.4 volts. UF opens of about 0.5-1 volts, and shotkeys, how I know is faster. Can work and with UF, but with shotkey must work better.

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1044 on: May 01, 2014, 11:00:52 AM »
D1-D4 better use shotkey diodes, for example 60 volts 1-3 amps. Because shotkeys open after 0.3-0.4 volts. UF opens of about 0.5-1 volts, and shotkeys, how I know is faster. Can work and with UF, but with shotkey must work better.

Hey MenofFather,

Excellent Thanks for all the information! I will keep in mind and once we have all check and verified the schematic I will make the changes.

@All - Would a SMD or Through Hole board be better?

At the end of the day just a verified schematic would be nice but I was thinking if we decided to get some boards made then going to the next step would be good.

All the Best

  Chris

TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1045 on: May 01, 2014, 11:15:51 AM »
Please, people!   Don't post images that have pixel counts over 1024 in either direction! If you need to post large images, upload them to the "download" section and then link to them.

The reason the page width is screwed up on this page is because of the superwide schematic images up above.


Chris, you have one schematic up above labelled as coming from me....  but it's not my work. I just reposted it from OUR, I didn't draw it. I think it is Groundloop's work. So far, I have made no changes or additions to any of the circuit drawings except the 3V Flashlight one I am working with.


Yes, the TL494 is just an oscillator. It has some features that make it nice for Tesla coilers, but I can't find the "overunity pin" on any of the data sheets.

Yes, the TL494 can work way out of its rated range.  The TinselKoil 2.0, primary oscillator is a TL494, operating at 400-800 kHz:

https://www.youtube.com/watch?v=LFDjZ_Va9xg

Yes, the TL494 can be audio modulated and can drive a flyback transformer to make a singing arc. Arc speakers have remarkable fidelity, they are really fun to play around with. You can get high quality sound (at low volume) from an invisible corona discharge, you don't even need an actual arc.


People sometimes really amuse me greatly. Especially in these Akula threads. We have several people telling us what will work and what won't work and why and why not ... but it seems to me that the real key to getting one of these circuits "working" is .... you have to be Akula! Because _nobody_ else has actually demonstrated a "working" version of any of his circuits. The people who "know".... are just guessing, I think. Where is the evidence for their contentions that "A" works but "B" doesn't work? I don't think there is any. General principles of making good transformer effect and using resonant voltage rise or VRSWR (standing wave resonance) are always good to have in mind: Fast cutoffs of transistors driving inductive loads, and fast acting diodes in parts of the circuit handling the spikes and ringdown from the inductors when they are switched off. But these principles are known by anyone who builds and experiments with solid state TCs or other HV and VHV apparatus.







EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1046 on: May 01, 2014, 11:23:38 AM »
Chris, you have one schematic up above labelled as coming from me....  but it's not my work. I just reposted it from OUR, I didn't draw it. I think it is Groundloop's work. So far, I have made no changes or additions to any of the circuit drawings except the 3V Flashlight one I am working with.

Hey TK,

I did note at the bottom that the schematic was not your design:

Please Note: TinselKoala did not draw this schematic only added the Values.

I think most following will know anyway.

Can you see what I am talking about in the circuit where there is an error? I think its important to see there is a big difference between the Run Cap and the Charge/Discharge Cap!

All the Best

  Chris

P.S Your preference - SMD or through Hole Board Design?

TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1047 on: May 01, 2014, 11:25:49 AM »
@EMJunkie:

Chris, I strongly advise you _not_ to spend any  money on making PCBs for this circuit! A PC board restricts you to a particular layout and cannot be easily changed. Some of us can recall several instances when people had PC boards made that incorporated errors or were for circuits that weren't actually used in the original claimant's reports.

 It's clear that a printed circuit board is not necessary for Akula. He uses that ugly pad-per-hole board and just uses blobs of solder to make his connections, and his circuits -- all of them -- work fine. If you believe him, that is.

The technique I used for the 3V flashlight circuit will be better for this kind of prototyping, and that's what I'll be using. The time to make PC boards is _after_ someone else besides Akula has actually demonstrated a self-runner and the circuit used is fully known and characterized.

I don't want to keep anyone from having their fun, but I am telling you now: If you make PC boards now, expecting that you will be able to make a self-runner using them.... you will be disappointed, and you will have spent a lot of money and effort needlessly.



TinselKoala

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1048 on: May 01, 2014, 11:28:57 AM »
@Chris:
I didn't even "add values" to that schematic. I made no changes in any schematics _except_ the 3V flashlight one in the other thread. I only posted the 2x 494 schematic to ask if it was the "Official Approved" one, and I appreciate your pointing out the discrepancies you have noticed.

EMJunkie

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Re: Akula0083 30 Watt Self Running Generator.
« Reply #1049 on: May 01, 2014, 11:29:19 AM »
@EMJunkie:

Chris, I strongly advise you _not_ to spend any  money on making PCBs for this circuit! A PC board restricts you to a particular layout and cannot be easily changed. Some of us can recall several instances when people had PC boards made that incorporated errors or were for circuits that weren't actually used in the original claimant's reports.

 It's clear that a printed circuit board is not necessary for Akula. He uses that ugly pad-per-hole board and just uses blobs of solder to make his connections, and his circuits -- all of them -- work fine. If you believe him, that is.

The technique I used for the 3V flashlight circuit will be better for this kind of prototyping, and that's what I'll be using. The time to make PC boards is _after_ someone else besides Akula has actually demonstrated a self-runner and the circuit used is fully known and characterized.

I don't want to keep anyone from having their fun, but I am telling you now: If you make PC boards now, expecting that you will be able to make a self-runner using them.... you will be disappointed, and you will have spent a lot of money and effort needlessly.

Hey TK,

Yes, I agree and have already been down this path. I will be breadboarding it first, then If I am lucky enough to make it work....

All the Best

  Chris