Kapanadze Cousin - DALLY FREE ENERGY

[itsu]

Belfior,

i have the same module, but managed to blow it up but it was working fine untill then.

No diagram available other then the ones on that website.

I made a layout of my module after i made some modifications to operate it with variable frequency (100K trimmer instead of R6)
and variable duty cycle (100K trimmer at lower connection of (removed) R7 position) giving it a 0 to 44% duty cycle.

The backside (right to left) shows some names which corresponds the following way to what i mention on the front:

PWM2  = output 2
PWM1  = output 1
GND   = minus
VCC   = 9-25V input
RTH   = +5V ref
NC
Feed- = minus
Feed+
Pro
REM

Hope thats clear,  Regards Itsu

[Void]

Good info Itsu.
All the best...

[NickZ]

   Belfior:
   I think that the commercial TL494 is the best way to go, as it can take a lot of time to make a similar the circuit at home, that works as well, or cost less.
   You might try it with just the frequency trim pot, first, as the duty cycle controller doesn't help too much. Since it's already running at 45% duty cycle as it comes, I believe. And lowering the duty cycle even lower than 40%, doesn't seam to help too much.

    Itsu: Well, it's good to hear that I'm not the only one blowing these things up.  I feel better now. But, I had another Snicker Bar, just to be sure.
            I'm looking for the cap and 1k resistor for the Oleg snubber. I guess that a 1uf electrolytic cap won't do?
            So, I should disconnect the source side of my MUR3060, but leaving the drain side of it still connected, and connect that other end of those diodes to the 1k resistor, and cap, which are going to the gates?

[gyulasun]

Hi Folks,

Sorry to chime in but I can see some schematics in the ebay seller site Belfior linked to.  If you click on the right hand side arrow I circled in red in my snapshot picture below, you can see them.

Gyula

[NickZ]

    Itsu:
    I found a 1.2uf capacitor, it's one of those big black ones that come on fans and stuff. Is that close enough to 1uf?  I have no 105 (1uf) on hand, but I do have a 225 (2.2uf).

   Gyula: Thanks for the link to the TL494 schematic.