Guys i just figured out how the circuit should be if i would like to trigger the EEC just before current start to flow in the inductor (vic).
I basically divide the frequency signal from the pll pin 4 by 2 using a 4017 ic and than combine this 2 diferent signals into a nor gate (4001) witch will create a third positive signal when the 2 signals happen to be both 0 logic. Having the vic the ability to double the frequency, its feedback will need no dividing to close the pll circuit...
This will allow me to have a pulse exactly after 90° from the first pulse trigering the vic because the 4429 driver i´m using inverts the signal... other wise i would need to use an and gate instead of a nor gate to have (theoreticaly) the right signal. (also the signal coming from the nor gate must pass thru a optocoupler and again the 4429 as to remain uninverted) as from the drawing
Don´t complain about the drawings, if is not good enough for you to understand, try drawing it yourself... If you still don´t understand, read the datasheets or google logic gates...
For the optocoupler part;
Must have its own isolated power supply
Regulator 7808 (doing good here) 8v
than
in series with the laser diode a 500ohm resistor (this must beconnected to the nor gate circuit grownd and output )
Than the emiter of the opto must go to the isolated grownd such as the 4429 grownd too
the colector from the opto should go to the pin 2 of the 4429 and from the same pin 2 should go a 1 or 2 kohm resistor to the isolated positive
Basically only the diode of the optocoupler should be connected to the first circuit
When the puse go to the optocoupler it will short the pin 2 from the 4429 to the ground making it to start conducting...
i´m going to build this circuit today for doing some tests
I´m trying to understand
Are you?
i Would not like to talk alone.
