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Author Topic: Kapanadze Cousin - DALLY FREE ENERGY  (Read 4859535 times)

Offline magpwr

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16860 on: March 08, 2017, 02:53:58 AM »
hi everyone,

I have attached 2 version of PWM circuits (TL494 and SG3825AN) for your information.

If you compare just one key difference between TL494 and SG3825AN.

The output of TL494 can merely provide 250mA or 0.25Amps.

The output of SG3825AN
can provide 1.5Amps and there is no need to install mosfet driver(optional) and  it lower component count and total cost.

This is my youtube video -

UC3825 PWM Circuit with inbuilt 1.5Amps Mosfet Driver
http://www.youtube.com/watch?v=AKLRqOK5p8w

I am using Mylar Polyester capacitor for the frequency generation.But you like even better rock hard frequency stability do consider using mica capacitor for the frequency only.

That's all for PWM.

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16860 on: March 08, 2017, 02:53:58 AM »

Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16861 on: March 08, 2017, 03:34:17 AM »
   Hoppy, Verpies, and magpwr:
   Thanks for the help. Problem solved!!!
   It was as Verpies had mentioned. Now It works,  clean square wave signal on both outputs.
   Thanks again.
                           


Offline Hoppy

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16862 on: March 08, 2017, 09:49:09 AM »
Nick,

You can now connect the missing duty pot to pin 4. See circuit posted by Magpwr above.
« Last Edit: March 08, 2017, 01:21:51 PM by Hoppy »

Offline plaxius

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16863 on: March 08, 2017, 05:39:00 PM »

If try Arduino Push Pull ?? very easy.

https://softsolder.com/2009/05/21/arduino-push-pull-pwm/




and Mosfet Driver circuit  ...















Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16864 on: March 08, 2017, 06:56:48 PM »
   Happy.
   The two trim pots are already installed and connected.
   I am following the Ruslan 7 circuit that I had posted, instead.

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16864 on: March 08, 2017, 06:56:48 PM »
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Offline verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16865 on: March 08, 2017, 07:06:36 PM »
You can now connect the missing duty pot to pin 4. See circuit posted by Magpwr above.
IMO the DTC pin (4) is not designed for duty-cycle variation.  This is especially true in the push-pull mode (when pins 13 & 14 are connected together).
The error amplifiers (pins 1,2,3,15,16) are designed for varying the duty cycle as depicted in this schematic,

Online AlienGrey

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16866 on: March 08, 2017, 10:04:36 PM »
If try Arduino Push Pull ?? very easy.

https://softsolder.com/2009/05/21/arduino-push-pull-pwm/

and Mosfet Driver circuit  ...
  Using a micro processor would be a very easy way of getting all the timing very accurate, Unfortunately once the Tesla coil starts doing it's thing it will induce electro magnetic waves and voltage pulses into the device and all hell will break loos with the device, stack count loss incorrect program jumps and possibly program loss and possibly destruction in close proximity to the device, if i were you I would stick to conventional hardware.

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16866 on: March 08, 2017, 10:04:36 PM »
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Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16867 on: March 09, 2017, 12:10:01 AM »
IMO the DTC pin (4) is not designed for duty-cycle variation.  This is especially true in the push-pull mode (when pins 13 & 14 are connected together).
The error amplifiers (pins 1,2,3,15,16) are designed for varying the duty cycle as depicted in this schematic,

  That is correct,  the duty cycle does nothing. The frequency trim pot does work as expected. 
   Should I change it as you suggested?
  Here is the circuit that I've been working on.  Can it be modified? As it's not too late to do so.
  l'll remove it,  once you see it.  As it's too large.
  Thanks again.


Offline apecore

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16868 on: March 09, 2017, 07:10:07 AM »
  That is correct,  the duty cycle does nothing. The frequency trim pot does work as expected. 
   Should I change it as you suggested?
  Here is the circuit that I've been working on.  Can it be modified? As it's not too late to do so.
  l'll remove it,  once you see it.  As it's too large.
  Thanks again.

Nickz,
This circuit os working....i only use a 10k pot for D/C.

Offline Hoppy

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16869 on: March 09, 2017, 01:13:19 PM »
  That is correct,  the duty cycle does nothing. The frequency trim pot does work as expected. 
   Should I change it as you suggested?
  Here is the circuit that I've been working on.  Can it be modified? As it's not too late to do so.
  l'll remove it,  once you see it.  As it's too large.
  Thanks again.

Nick,

I've never had a problem using pin4 DTC for duty control. Try linking out the 12K resistor. You should get up to 45% with a fairly linear response between 0V and around 3.35V with 20% duty at the middle of the voltage range. There is a better way of doing it as Verpies suggests but to avoid messy changes to your board, I suggest you try and get the pin 4 duty control working properly.

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16869 on: March 09, 2017, 01:13:19 PM »
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Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16870 on: March 09, 2017, 03:56:51 PM »
  That is correct,  the duty cycle does nothing. The frequency trim pot does work as expected. 
   Should I change it as you suggested?
  Here is the circuit that I've been working on.  Can it be modified? As it's not too late to do so.
  l'll remove it,  once you see it.  As it's too large.
  Thanks again.

  I can't remove the schematic, as the modify button is not showing up.  Please help,  so that the page is not messed up.
  I'll modify the duty cycle controller.

Offline verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16871 on: March 09, 2017, 05:35:28 PM »
Should I change it as you suggested?
It's up to you but I can assure you that changes made to the TL494 controls will not affect the MO of the device.
In this video you can see how the TL494 works when it is controlled this way.

P.S.
If I were you, I'd connect pins 8,11,12 to the positive 12V rail of the power supply with separate traces/wires.
Also, for added speed and stability, I'd delete these 1K5 resistors connected to pins 9 & 10 and alter the neighboring 1K resistors to 330 Ohm.


Offline NickZ

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16872 on: March 10, 2017, 03:36:52 AM »
   OK, first of all, sorry for messing up the thread. I can't remove or replace the schematic. Maybe the admin will do it.
   Makes me wonder what other errors that schematic may have, also.

   I have been very busy lately with work, 10 hours per day, but I will remove the 12k resistor and hopefully that will take care of the problem with the duty cycle part of the circuit. I can also replace the 20k trimpot, with a 10k pot, if needed, as apecore is using, by itself, without the other 12k resistor.
   I am using 3 watt 460 ohm resistors in the 9 and 10 pins, looks like some other diagrams are showing 10 ohm resistors, instead. And I am also using 1k to ground, after the 460 ohm resistors. 
  Thanks again for your help guys. Hopefully that will take care of the duty cycle issue, and I can continue installing the fet drivers and snubbers.

Offline verpies

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16873 on: March 10, 2017, 09:53:29 AM »
Makes me wonder what other errors that schematic may have, also.
Don't think about them as errors - just another way to do things.

I am using 3 watt 460 ohm resistors in the 9 and 10 pins, looks like some other diagrams are showing 10 ohm resistors, instead. And I am also using 1k to ground, after the 460 ohm resistors.
So you can move these 460Ω resistors in place of the 1K resistors to ground and connect pins 9 & 10 of the TL494 directly to the TC44220s. 
These resistors to ground can go as low as 48Ω but it is very important that these resistors are not wirewound or inductive in any way.

Whoever was designing this circuit was trying to unnecessarily make a protective voltage divider for the TC4420 inputs without realizing that these inputs can easily tolerate any input voltage between -5V and VDD ...and more.

The DC CHARACTERISTICS Table of the TC4220 clearly states:
"Input Voltage Range     VIN  –5   —  VDD+0.3    V"

The resistors to ground are needed as pull-downs by the transistors inside the TL494 acting as emitter followers. 
These transistors can handle 250mA and with a 12V supply the 460Ω resistors to ground will allow only 26mA to flow, so there is no problem with making them 460Ω ...hell, they could even go as low as 48Ω and the TL494 could handle them.


Online AlienGrey

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Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16874 on: March 10, 2017, 07:05:54 PM »

Free Energy | searching for free energy and discussing free energy

Re: Kapanadze Cousin - DALLY FREE ENERGY
« Reply #16874 on: March 10, 2017, 07:05:54 PM »

 

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