'LIGHTWAH'

[deadastronaut]

i had a late one!..last night...ok hold on..

heres how i have it working on bb...



i need more sleep i think...

[deadastronaut]

whoops...

[deadastronaut]

right ive had a think.

ideally i want the leds next to the relevant ldr's...just for board tidyness etc..

so ive drunk lots of coffee and came up with this...its a bit smaller length wise, (sorry for messing you about armando )

could you guys take a look and see if anything is weird....the only bit i'm not too sure of is around the lfo part....pin 5 /150k to pin 1 bit..hmmm...(phozer type lfo)

its using 2 tl072's...

if it looks ok, i'll crack on and do it...and if verified, ill put the pdf up of the layout and pcb.  



phewww...i need a beer..

[deadastronaut]

ok i built the above version today...as the forum was down  

and the lfo is definately not having it....the leds are on, but just not fading in and out...im using the 'ph0zer' lfo.(runoffgroove)..theres something amiss with how ive done it...

and  the 10kb sensitivity pot smokes when i turn it..

the rest is fine by the looks..@#$%ing lfo...arghhhhhh........

but its the lfo thats really peeing me off...arghhhhhh......

[deadastronaut]

can someone check me on this lfo?..ive tried it various ways and it just wont pulse...for reference this is the ph0zer lfo.. my dodgy schematic page 15..

it worked fine on breadboard this way, but i dont know whats gone wrong in pcb translation...

ive got it so when i connect + it slowly lights the leds, but wont pulse?...

does this look ok to you?..



heres my numbers for the tl072

p1  4.62
p2  4.75
p3  4.50
p4   0.00
p5   4.58
p6   4.62
p7   4.62
p8   9.10

no fluctuation at all....

[deadastronaut]

hmmm had a probe around , if i connect pin 2 and 7 it works....but not half as slow as i had it on breadboard?...the @#$%er...

and nowhere in the scheme does it show pin2 and 7 connected...weird!...

[arma61]

Hi

looking at the Phozer there's a 10n cap from pint 2 to 1, aren't you missing that ?

[deadastronaut]

hi armando,  , yeah i changed that to a 1m...it just faded in and out much better...

i dont see how it has to have pin2 and 7 connected to work.. but not at the right speed...strange..



EDIT:

OH @#$% IT....I GIVE UP...TOO MANY LATE NIGHTS SPENT ON THIS @#$%ER..I GAVE IT A DAMN GOOD GO THOUGH!....

I'M HITTING THE WHISKEY....

[askwho69]

hi armando,  , yeah i changed that to a 1m...it just faded in and out much better...

i dont see how it has to have pin2 and 7 connected to work.. but not at the right speed...strange..



EDIT:

OH @#$% IT....I GIVE UP...TOO MANY LATE NIGHTS SPENT ON THIS @#$%ER..I GAVE IT A DAMN GOOD GO THOUGH!....

I'M HITTING THE WHISKEY....

hahahaha rob please be patience ! i know you can do it!

[deadastronaut]

^yeah, i'll give it one more go!...in a better mood today...

:note the 'darklight' above has had a 4.7k resistor added....i kept burning out pots ...they looked good though!...sorted now ok.

i had the darklight on a tiny bb, running on an old battery, when i put it on my psu powered bb, it burnt it...theres a lesson for me eh!...test in real life conditions!!!!!!..

[askwho69]

ohh yeah!!! you might want a chick for it?

[deadastronaut]

can someone check this out?....heres the schematic for the lfo..

and the lfo ive put into diylc v3....does it look ok?....

pin 2 is the 1M...pin 1 is the 6.8k....both upright resistors ok.




the rest of the layout looks fine...but i just want to be sure of this bloody lfo...anyone?..

[deadastronaut]

heres the full layout!... ive left space for actual size of leds/ldrs...

[deadastronaut]

if anyone is remotely interested.... YAWN!...

and fancies giving this a shot, heres the layout pdf, and pcb pdf ok....

ive made a pcb of it, (and one for armando ) but wont have time this weekend to build/verify  it....ive checked it over many times and it all looks ok...

i re-breaded the lfo especially, and it looks cool to me!...blood sweat and many tantrums  went into this @#$%er!!!!....but it looks ok now!...

http://dl.dropbox.com/u/7464107/LIGHTWAHPCB2.pdf

http://dl.dropbox.com/u/7464107/lightwah%20layout.pdf

[deadastronaut]

YAWN!... ,

i got round to populating the pcb last nght, just gotta do the wiring today...

if i can skip some family get together bs. ....

[deadastronaut]

@#$%ING VERIFIED!...

it ALL  works great...at last...

the lfo is really good, no noise/ticking etc...whhoooo..hoooo.....

there is a bit of whooosh noise when distorted....but i guess thats t be expected with distortion on it....

AT LAST now i can get this @#$%ing circuit out of my head!!!!!!!!!!!!!!!!!!!!.....and crack on with some other projects ...

i'll do further tests...

[arma61]

Great job m8!!

good layout.... just waiting to see your effort on the new enclosure for this beast!


Just one question, do you think the LEDs you mention on the PDF are mandatory? did you tested with standard LEDs?


Thanks Rob!! 

[deadastronaut]

hi man, yeah i tried various leds for the lfo...blue , red,orange, etc...but yellow seemed to be best

especially as they are in series...i think (not sure) that standard one might be dim... ... ...i never tested standard ones though... didnt have any..

ive desinged my box for this, ..

just need to run a few more tests on it....

oh yeah :

C8 = 10UF.
AND SPEED POT 470KB.

[deadastronaut]

heres a final clip of it....its great having the volume on it, it really pushes into the distortion...you can hear it from 3:00 onwards...enjoy

http://dl.dropbox.com/u/7464107/LIGHTWAHTEST.mp3

[askwho69]

Congrats ROB!! wow its sound so amazing super amazing!! hope to see it in a box!!! thanks ROB