Akula0083 Light No3 - Dual TL494

[MenofFather]

How I understand, can be modulation feroresonance, then posible put to transistor packs of pulses, duration betwen packs is standart transformatio and duration and frenquency of pulse is feroresonance frenquency.

[MenofFather]

Akula say, that burn many ferites, then long hold on feroresonance its. Burn means, probarly, that ferite lose important features. And say, that must be sinchronisation of two generators by first fronts, end fronts syncronise comparator. 50 ns if be diference, here is to much.

Akula advice make sinchronisation with triger, because triger lets you make synchronisation in range 40-50 nanoseconds. Without triger wery dificult sincronisate, if you try sinchronisate with inside comarators, that make be almost not possible, you stop in range 1 milisecond. Any triger lets you make sinchronisation in range 50 nanoseconds, then you not destroy feroresonance in that small divices.

[JohnnBlade]

Hello All,
I hope this helps.

It sure will!  Thnx Madsatbg!

[Vortex1]

Hello All,
I hope this helps.

It's a big help, thanks.

The area I question (lower right just above the input capacitor) is right  after  and below the switch. I think that the power to the two coils (dots) comes from the land area right after the switch, and it is shown after the diode on Johns sketch of the layout.

This would conform to the revised schematic.

[JohnnBlade]

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