DDL driver making help.

[MAPESA]

DDL driver, 1 question?

So i DID read the LPC-815 driver-thread, and there was suggested to use 3.3ohm resistor in the driver.(3x 10ohms parallel)

i have built my DDL driver exactly like this

but it doesn't have the potentiometer, wire link or the resistor yet. (wasnt sure so i decided to ask)

Can i leave the pot place empty(or replace with wire) and use in the resistor's place 3x 10ohms in parallel? will the DDL driver then supply about 420mA to my incoming LPC - 815?

Sorry for asking the same old noob questions again.

 

[rog8811]

If you put the three 10 ohm resistors side by side then link from the right hand end of the resistors to the left hand end of the link....a picture paints a thousand words.
That will give you 378ma output.

Regards rog8811
EDIT Incorrect picture replaced

 

[MAPESA]

OK, :thanks: rog! nice that you made a picture only to help me!++

But, i was curious last night (i started sleepin 4 am:tired, i just soldered 3x 10ohm resistors together and stuck the
"big 3 ohms resistor" to the resistor place.

Then i soldered a wire link to the pot's places ends. well i think i'll also make a pic.

picture will be coming, but i tried the driver with 20-white 5mm leds soldered parallel, and they all lit up nicely, didn't heat up, and the voltage went from 9 to about 3 as wanted.

dunno how to attach pic's, so:

That's how my driver looks like. I hope its not wrongly made. Rog, if you could say is this this driver ok, for LPC-815 @ 420mA, that would be gr8. just to add: the resistor in pic is 3.3 ohms.

 

[rog8811]

I have never used an LPC-815 so I cannot comment other than to say that I understand that they are a direct replacement for the LM317 connection wise, what you have done to bypass the pot is correct.... in fact, embarrasingly, my picture was wrong as it left the diode disconnected (I have changed the picture as I do not like to leave incorrect info on the forums).

Regards rog8811