'LIGHTWAH'

[scuzzphut]

That schematic confused the hell out of me until I realised that the Sensitivity pot on the LFO side was actually the Speed pot 

HYSH  - Checking voltages is a challenge - the LFO has them constantly moving, even at lowest speed. That said.

Pins 1-8 in order are.

1 to 8V
3.5 to 5V
3 to 6V
0V
4 to 5V
4 to 5V
4 to 5V
9.1V



What voltage are you getting at the positive side of D1 - how does that compare to the IC voltages?

[deadastronaut]

I realised that the Sensitivity pot on the LFO side was actually the Speed pot 

oops!..

[haveyouseenhim]

AAAAHHHHHHHH!!!!!!!!!!!!!!! My LFO is O-ing.     to me it looked like the led was flashing at a very high speed, kindof like a fluorescent bulb. so i made a light to sound circuit on my bread board to see if the speed knob would change the frequency AND IT DID. so i just replaced the 10k speed pot with a 1m AND IT WORKEDDDDDD       ive never been so satisfied with a debug!

[deadastronaut]

whooooooooooohoooooooooooooooooooooooo..................


cool........

[haveyouseenhim]

Explain yourself Mr. Astronaut.......... Putting out faulty layouts and whatnot





thanks for the awesome pedal

[deadastronaut]

  believe me the lightwah was a massive learning curve for a dumbass like me .....i knew what i wanted, but only had half an idea on how to go about it...

i'm still a dumbass ....but i have lots of fun while creating stuff!..

glad ya got it going man!...


(working on another mad creation now)

[midwayfair]

AAAAHHHHHHHH!!!!!!!!!!!!!!! My LFO is O-ing.     to me it looked like the led was flashing at a very high speed, kindof like a fluorescent bulb. so i made a light to sound circuit on my bread board to see if the speed knob would change the frequency AND IT DID. so i just replaced the 10k speed pot with a 1m AND IT WORKEDDDDDD       ive never been so satisfied with a debug!

oh holy crap. All that time I was staring at your board, I didn't even think to ask what value your speed pot was! I used 500K.

Well, now you have TWO Lightwahs! Time to run them in series.

[threepwood]

cool:  i used a 5k-1M ldr... 

Do these fit the bill?

http://www.ebay.co.uk/itm/5x-Light-Dependent-Resistor-Photo-Photoresistor-LDR-/120689977478?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item1c19aee886#ht_1043wt_952

[haveyouseenhim]

@ Barbara       thanks alot . at least you know your way around a circuit. im just barely a step above a paint by numbers builder

@ Jon     Yea, it had me stumped for a while because im so dependent on layouts. i can read schematics but i struggle. One is going in a wah shell and the other in a 125b

Thanks for both of your help

[deadastronaut]

@mike: no probs!..glad to see others enjoy it too...all part of the diysb ethos!..

look forward to seeing/hearing all you guys builds.

@threep: yep they'll be fine...and nice n cheap too..

[revelacaoverdao]

I had a quick question regarding the schematics and PCB drawing you have up here.
Midwayfair posted what I believe is the most updated version of the schematic it was said. However,
when I look at it and compare the values on that schematic to the PCB drawing that is most updated,
some values vary. For example, R7 on the schematic is listed as 6.8k where as on the PCB it is 1M.
Is the schematic correct for layout and pathing but not values is that it?

Thanks for the help, I cant wait to start up on this project!

[deadastronaut]

@rev:

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

and welcome!..

[scuzzphut]

I have this working as a lightwah, but when I tried the "volume-only" mod, I just got silence out, always.

Anyone confirm that this mod works ?

[vattern]

Can someone cast a set of eyeballs please, 1590B sized, board mounted pots and switch.

[vattern]

Layout works, but needs some refinement for home etching. Can't mount the switch on the underside and still solder it *facepalm*

[deadastronaut]

why? switch lugs not long enough?

looks like a cool layout though....nice.

[vattern]

why? switch lugs not long enough?

looks like a cool layout though....nice.

Got a proper PCB mount switch today, now it works nicely

I'll post a BRD file if anyone wants ?

[deadastronaut]

^ cool. glad you got it sorted....

look forward to seeing your build too...

[andyhooper]

having trouble with the LFO. Apparently the lfo section is very choosy about the LEDs. I tried a 5mm yellow, yet I don't know if it is superbright. the thing is that at full darkness in the room I can actually see the yellow led and the external led flashin with the lfo, yet it's waaaaaaaaaaaaaaaaaay too dim. Any suggestions?

[andyhooper]

So I googled superbright yellow led, and they are transparent. that means my yellow led is a common yellow led. In case I can't get a superbright yellow, what could my other options be, mr. "maestre of pedals" dead astronaut? I'm dying here to get the effect working and playing it through my Tele!!!!