Kapanadze Cousin - DALLY FREE ENERGY

[NickZ]

   Guys:
   Is there some reason that we need to build a TL 494 circuit board ourselves?  Can't a ready made controller board be purchased such as the one below, or something similar, to control the frequency and duty cycle of push-pull/grenade generator circuit?  And, also, a ready made adjustable Kacher circuit board, as well?

  http://www.ebay.com/itm/TL494-KA7500-DC-9V-25V-Driver-Board-DC-DC-Converter-Inverter-Boost-Module-PWM-/181449170972?pt=LH_DefaultDomain_0&hash=item2a3f36a01c

[lost_bro]

   Guys:
   Is there some reason that we need to build a TL 494 circuit board ourselves?  Can't a ready made controller board be purchased such as the one below, or something similar, to control the frequency and duty cycle of push-pull/grenade generator circuit?  And, also, a ready made adjustable Kacher circuit board, as well?

  http://www.ebay.com/itm/TL494-KA7500-DC-9V-25V-Driver-Board-DC-DC-Converter-Inverter-Boost-Module-PWM-/181449170972?pt=LH_DefaultDomain_0&hash=item2a3f36a01c

Hi Nick

Yes, a ready made controller like the one in the link is decent.  I purchased one a couple of years ago to build a push-pull inverter for another project(High voltage variable voltage supply).  It was actually a UC3525SG chip, similar in function to the TL494CN as both can be used for push-pull configurations.
The pics show :
UC3525SG attached to hand made motherboard for interfacing to the MOSFET bridge:
Back of UC3525SG card with modifications made to interface with motherboard:
MOSFET bridge of same project:
Push-Pull transformer with regenerative snubbing capacitors/diodes:

You will need to *reverse engineer* some of the interfacing connections as the actual schematics for the board are NOT included from the seller.

take care, peace
lost_br0

[NickZ]

  That's the idea, it's just a matter of finding the right ready made controller circuit, for the type of push-pull driver we are using. In my case I'm still the using the modified Mazilli circuit, for now, but, I wouldn't mind trying out one of these commercially made pulse modulators, to connect to the Mazilli crt.
  I just can't see spending the time to make what can already be purchase for a few bucks. Some of these sell for very low price. I can't do a better job, or for less money, than what these modulator boards cost.
If they can be put to work for our tests.
  Common guys, give your opinions. 

[lost_bro]

  That's the idea, it's just a matter of finding the right ready made controller circuit, for the type of push-pull driver we are using. In my case I'm still the using the modified Mazilli circuit, for now, but, I wouldn't mind trying out one of these commercially made pulse modulators, to connect to the Mazilli crt.
  I just can't see spending the time to make what can already be purchase for a few bucks. Some of these sell for very low price. I can't do a better job, or for less money, than what these modulator boards cost.
If they can be put to work for our tests.
  Common guys, give your opinions.

Hi NickZ

I will add one more comment:
The Mazilli circuit is a resonant topology which incorporates ZVS as a necessary characteristic.
The TL494 and SG3525 pcbs control boards as sold on Ebay, etc; are NOT a resonant topology, NOR do they perform ZVS.

That being said, they are different animals......

It really depends on the application and the amount time one wants to spend to *adapt* one of these boards to the project at hand.

It can be done, but for example looking at the link you posted, the TL494 control board on ebay has a fix frequency.  So to start with one must de-solder the SMD resistors, drill holes and install a trimmer resistor just  to get adjustable frequency.

On the other hand, it's the best way learn....*reverse engineering*

take care, peace
lost_bro

[NickZ]

   I did notice that those particular boards are not frequency adjustable, but there are others that are.
Like I said, it may be a matter of finding the right ones for the job, as there appears to be a wide selection to chose from, and some of these modulator are very inexpensive, as well.
  The idea comes from seeing how both Akula and Ruslan are using the store bought "el cheapo" inverters, instead of trying to make their own. Same thing with the oscillators circuits, why make what can be bought, for cheap.  Not available???