'LIGHTWAH'

[deadastronaut]

i drill 10mm holes...thats the max my old drill will take, then i open them more with a reamer...a really great and useful tool.

http://www.google.co.uk/products/catalog?q=reamer&hl=en&safe=off&prmd=imvns&resnum=3&bav=on.2,or.r_gc.r_pw.,cf.osb&biw=1887&bih=969&um=1&ie=UTF-8&tbm=shop&cid=949745905530156716&sa=X&ei=h8btTu7bOou58gOLsOntCQ&ved=0CGwQ8wIwAA

[deadastronaut]

oh dear!!!

some guy emailed me, he bought one of my lightwahs off some guy, all was fine then  he mistakenly put 18volts supply on it..

and now it won't work...surprise surprise 

what would you guys say was blown on it?...op amps tl072's and leds...?....

[tasos]

Well if he used tl072 no!They can handle 36 volts....(+-18) http://lukas.cerro.sk/upload/2009/03/datasheet_TL072.pdf

Probably some electros blown....(don't have the schematic on my table so i can't tell for sure...)

The good news is that the guy can see what went wrong!
Well when electros blow you can see it...
And well when leds don't light up ,you can't see them!

[angrykoko]

quick question.
This will be my first anything that had an LDR so I don't know much about them and how they are spec'd.

In one of the posts you mentioned using..5k-1M;  Was that for all of them or just the foot?
Also, taking a  guess that you mean 5k light resistance & 1M Min Dark  (making the assumption from smallbear's site).

Any help with regards to these would be appreciated.

Thanks in advance.

[deadastronaut]

yep they'll be fine in all ldrs ok....

[fretzburner]

Available LDR here is very limited in terms of values(they only know LDR and that's it-no impedance range) but i have an extra VTL5C10 is this applicable to this circuit?As per datasheet impedance is 400ohms to 400k,big difference on recommended 5k to 1M.
Thanks

[deadastronaut]

hi fretz: hmmmm, not sure on the range of wah you'd get out of that....

[fretzburner]

Tsk tsk I already bought bunch of LDR's but no match to the recommended value.Have to find somewhere else.Thanks deadastronaut for the clarification

[chromesphere]

Hey Rob,
This sounds like a fun circuit!  I was wondering, as a mod idea, could you add a switch or something, so that the effect would only affect volume, sort of like how a volume pedal works i guess.  Sometimes when i'm using delay i like to do swells, and im destroying the pot on my guitar 
Paul

[deadastronaut]

hi paul, i'm guessing here but, i suppose if you bypassed (jumped)  the t-filter that would work....

the original was going to have tremolo too on it....which would have acted the same...swelling up /down etc...i'll have a think...

[deadastronaut]

ok had a think.....excuse the bad schematic diagram...

i think this would work by bypassing the filter,(adding switch 2) but still have the depth/lfo etc....let me know how you get on...it would be a great addition...




like this i think.....

[chromesphere]

Thanks for the info Rob!  Ok so bypassing that res / cap network should get a sort of, tremolo "volume" effect.  I think ill have to give this one a go! 

Sorry, one more question, is there a PCB layout for it yet?

Paul

[deadastronaut]

yep sure is...in my gallery .....its just a guess, but the mod looks plausible to me...

http://www.aronnelson.com/gallery/main.php/v/chickpea/


if you give me a while, i'll try and incorporate the pads for that switch too ok..with a bit of jiggling about..!!!!!...

[deadastronaut]

ok paul, ive modded the layout and pcb,(added the pads)  they are in my gallery now ok...have fun

http://www.aronnelson.com/gallery/main.php/v/chickpea/?g2_page=4

let me know how you get on....cheers rob.

[chromesphere]

wow thats service thanks rob! im going to try this out 

[deadastronaut]

your welcome..

so hopefully its the same as this , but with optional tremolo/swells too....that'd be cool....

[chromesphere]

Yeah man, that would be awesome!!  

Hey, sorry to be a total nub here but i was going to print off the layout but that link doesnt work...for some reason?  Is it working for you?  Could you post the layout in this thread if you can access it?  otherwise ill just try later on, might be a DNS problem or something...

Edit: yep, navigatored there manually, definitely appears to be MIA.

[deadastronaut]

yeah i can access it...

you click on download document...top left....sorted 

[chromesphere]

And there it is!!  Must have been a DNS issue.  I was getting 404.  Thanks again!
Paul

[deadastronaut]

someone asked for a tremolo mod schematic so here it is.........haven't tried it myself, but looks like it may be ok......unverified as yet!