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Author Topic: Akula0083 Light No3 - Dual TL494  (Read 96309 times)

Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #15 on: May 09, 2014, 11:16:43 PM »
Wow now i really appreciate my ACMMJB more after some tests with this Akula light.

cause i tried hooking up a motor on the output but it cant even make that spin with, and input goes up to 500mA @ 6v

with my ACMMJB i can run my dc motor with 270mA at 15.40v but input doesnt notice the dc motor.

something tels me its not voltage we are after, but we need to get the amps

but im not done yet ;)

Stage 1 ( ic1 ) works ok but on scope looks like shit
Stage 2 ( ic2 ) works ok, and again scope looks like shit.

im using 6v as a reference, and from there tuning to get best output results

then when i have the best sweet spots i will test both tl494 at once and find the sweet spot from that, and once i have that i will goto step 3 and try a better mosfet driver and see if that makes any difference.

and a good thing is, i touched the leads and no shock so it safe to test :) dont put the leads on yr tong :P ( i did not try that yet hahaha, and i wont hahaha )

anybody else having the circuit up and testing?

Greets JB


Free Energy | searching for free energy and discussing free energy

Re: Akula0083 Light No3 - Dual TL494
« Reply #15 on: May 09, 2014, 11:16:43 PM »

Offline Vortex1

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Re: Akula0083 Light No3 - Dual TL494
« Reply #16 on: May 10, 2014, 12:20:04 AM »
John, Exactly which circuit are you using or what schematic are you working from?

Offline d3x0r

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Re: Akula0083 Light No3 - Dual TL494
« Reply #17 on: May 10, 2014, 12:26:20 AM »
Finally getting some high voltage :)

when rectifieng i get 7,8v when bulb is connected without bulb OL on meter.
when hooking up directly to the coil voltage is 22.7v

https://www.youtube.com/watch?v=7tOtGrWX9IU

i will do some more tests.  only thing is that my scope shot looks like crap, must be some disturbance going back to the mosfet, what can i do about that?

Greets JB
would help to know where your scope was...

 
Dally project (kapagen thing) used a tl494 as its base driver also...


from those expiraments,I find the best usage is to generate the shortest pulses that reach peek voltage a little and then drop off... this will be the lowest current draw; the lowest frequency that it can work at is also best, more ticks is more times current will flow.


If you have the duty cycle set to near 0.01% like... as you increase the frequency, you will have to lengthen the duty cycle to maintain ability to hit peek drive voltage



Free Energy | searching for free energy and discussing free energy

Re: Akula0083 Light No3 - Dual TL494
« Reply #17 on: May 10, 2014, 12:26:20 AM »
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Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #18 on: May 10, 2014, 03:42:01 AM »
John, Exactly which circuit are you using or what schematic are you working from?

@Vortex,

Im using my circuit and using the components i showed in the image.

But nothing special sofare, till now circuit just acts as a cheap inverter circuit

Greets JB

Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #19 on: May 10, 2014, 03:45:20 AM »
@Vortex,

Im using my circuit and using the components i showed in the image.

But nothing special sofare, till now circuit just acts as a cheap inverter circuit

Greets JB

so fare when i connect my scope its directly at the output of the signal gen ( pin 10/9 from ic1, or only pin 10 from ic2 ), with min connected, but when i hook up the scope to output i only use 1 wire cause im afraid i might fry my scope ( max dc voltage is 5v input of my dso)

Greets JB

Free Energy | searching for free energy and discussing free energy

Re: Akula0083 Light No3 - Dual TL494
« Reply #19 on: May 10, 2014, 03:45:20 AM »
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Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #20 on: May 10, 2014, 03:53:38 AM »
would help to know where your scope was...

 
Dally project (kapagen thing) used a tl494 as its base driver also...


from those experiments,I find the best usage is to generate the shortest pulses that reach peek voltage a little and then drop off... this will be the lowest current draw; the lowest frequency that it can work at is also best, more ticks is more times current will flow.


If you have the duty cycle set to near 0.01% like... as you increase the frequency, you will have to lengthen the duty cycle to maintain ability to hit peek drive voltage

Sofare with both of my devices it depend on what pulse you use, the smallest might not mean that its the best, sometimes its in between, cause the amp on output changes, even when its small pulses

only funny thing is is that load affects the input, while normally it doesnt with my other device

but what i find interesting is that as soon as 2 harmonics come close to eachother they melt together automaticly even when tuned a little off, from there it takes over by itself.

all im checking now is the behavior of this device and comparing it to the behavior of my ACMMJB.

maybe of interest to someone, when i measure the ohms on 1 cm on the ferrite its about +-220ohms when under load, with no power the ohm is about 180ohm per cm on the ferrite

Nothing special, but just sharing: https://www.youtube.com/watch?v=cd-aehFjV5I

btw i have to mention that the led is connected to the 19 turn on the ferrite, and the bulb is connected to the 12 turn on the ferrite

Greets JB

Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #21 on: May 10, 2014, 04:23:25 AM »
Hello All,
I hope this helps.

Hi Madsatbg,

What app did you use to draw that circuit pcb?

Greets JB

Free Energy | searching for free energy and discussing free energy

Re: Akula0083 Light No3 - Dual TL494
« Reply #21 on: May 10, 2014, 04:23:25 AM »
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Offline MenofFather

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Re: Akula0083 Light No3 - Dual TL494
« Reply #22 on: May 10, 2014, 08:19:21 AM »
In output this lantern of Akula is sine in sine he says.
On one transistor (probarly were low frenquency) is varistor, akula says that it needed then ajusting only, then ajust, then it can be removed. I now listening conferences with akula.

Offline madsatbg

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Re: Akula0083 Light No3 - Dual TL494
« Reply #23 on: May 10, 2014, 09:00:45 AM »

Hi JohnnBlade,


I use Sprint layout 5.0.
The original file have extension ".lay".
Software does not allow to attach the extension.
Give me your email, I will send him.

regards

Free Energy | searching for free energy and discussing free energy

Re: Akula0083 Light No3 - Dual TL494
« Reply #23 on: May 10, 2014, 09:00:45 AM »
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Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #24 on: May 10, 2014, 07:13:41 PM »
Hi All,

I made some scope shots from the output of the ferrite core.

Could someone let me know which pic is the most relevant and why?

If you need more info let me know

Greets JB

Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #25 on: May 10, 2014, 07:39:08 PM »
I forgot to mention that the ringing pattern only happens when the input is at 4.91v @ 40mA, when i turn the input up to 5.41v @ 140mA the whole ringing goes away and turns into the second picture.

Greets JB

Free Energy | searching for free energy and discussing free energy

Re: Akula0083 Light No3 - Dual TL494
« Reply #25 on: May 10, 2014, 07:39:08 PM »
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Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #26 on: May 10, 2014, 08:15:14 PM »
Here a shot of both signal gens together, its the same ringing but then the other way arround

1e frequency is 538.85kHz
2e frequency is 30.33kHz

Input is 4.34v @ 30mA

2e pic looks like a bo tie :) just showing probaly not relevant

Greets JB

Offline d3x0r

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Re: Akula0083 Light No3 - Dual TL494
« Reply #27 on: May 10, 2014, 08:30:36 PM »
Here a shot of both signal gens together, its the same ringing but then the other way arround

1e frequency is 538.85kHz
2e frequency is 30.33kHz

Input is 4.34v @ 30mA

2e pic looks like a bo tie :) just showing probaly not relevant

Greets JB
Haha ; nice shot of 'negative resistance'!   beware.
It's actually 'resonant rise'...


the low frequency is squelching the buildup from the higher frequency... so you get to watch the beginning of resonance.... usually we only get to see the highest state ... when it gets to 'cruise altitude' sorta

but ... what are both frequencies?  I kinda misread 1e and 2e to mean something about clock1 and clock2....

Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #28 on: May 10, 2014, 08:56:49 PM »
Haha ; nice shot of 'negative resistance'!   beware.
It's actually 'resonant rise'...


the low frequency is squelching the buildup from the higher frequency... so you get to watch the beginning of resonance.... usually we only get to see the highest state ... when it gets to 'cruise altitude' sorta

but ... what are both frequencies?  I kinda misread 1e and 2e to mean something about clock1 and clock2....

IC1 on the circuit is set at 538.85kHz
the 2e IC2 is set at 30.33kHz

if that is what you mean ?

Greets JB

Offline JohnnBlade

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Re: Akula0083 Light No3 - Dual TL494
« Reply #29 on: May 10, 2014, 09:07:33 PM »
@ D3x0r

i just did a quick google search on this "negative resistance"

---
In most situations the circuit resistance will have a positive value. This means that  is negative and the oscillation's amplitude declines exponentially as time passes. In effect, the circuit starts with an amount of energy stored in the inductance by the starting current, . As time passes this energy is dissipated by the resistor. The oscillation energy fades away and the resistor warms up. However, if we can arrange for the resistance to be zero, the initial current starts an oscillation whose amplitude remains unchanged as time passes. None of the oscillation energy is ever dissipated.

A negative resistance value means that  is positive. This means the oscillation amplitude and energy grow exponentially with time. In practice, we can't ever obtain an oscillation whose energy grows larger without limit. Infinite powers and energies aren't accessible in the real world! Something always restricts the rate at which the system can ‘create’ oscillation power. Fairly obviously, this power must also come from somewhere!

http://www.st-andrews.ac.uk/~www_pa/Scots_Guide/RadCom/part5/page1.html

----

http://en.wikipedia.org/wiki/Negative_resistance

so is this negative resistance any good for this Akula circuit?

greets JB

 

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