scematic for a VERRY simple wah wah anyone?????

[punkbass]

I am building a bass and i am planning to make a wah wah inside it with a tremolo style arm instead of a pedal because there is a 3x3 inch cavity inside the body. Anyone have any suggestions?
By the way, i want to use a opamp for this purpose.

[aron]

http://www.geofex.com/article_folders/wahpedl/wahped.htm#opampvers

[Brisance]

Sorry, but... coming from a different, not tainted by guitar slang past, please stop calling the whammy bar tremolo, when it actually does vibrato...

[smallbearelec]

http://www.geofex.com/article_folders/wahpedl/wahped.htm#opampvers

For a version of that schem that has been breadboarded and includes component values known to work, please see this article:

http://diy.smallbearelec.com/Projects/ISeeWah/ISeeWah.html

But it's Not what I would call a Very simple build. Might be too many parts to fit in your cavity. Also, you don't indicate what your experience level is with FX. If you can build a bass, sure, you are handy enough to build a board layout that someone else has done. But are you up to creating on your own something buildable? As for simplicity, a Twin-T Wah (mentioned elsewhere in R. G.'s article) might be the ticket. You might even want to control it with a pressure-sensitive resistor:

http://smallbear-electronics.mybigcommerce.com/alpha-membrane-force-sensor-mf-01/

Again, however, you'd need to be able to do considerable breadboarding and layout to get to where you want to go.

[joegagan]

here is a  twin T that i modded from tim escobedo's ' idiot wah' i know it isn't opamp, but is very low parts count. i used a 22k pot, i think 10k might work ok as well.

the reason i bring up 10k is-- the millions of rockband video game guitar controllers had a wang bar attached with a return spring and ( usually) a 10k pot inside. they are extremely plentiful in thrift stores, i believe could be adapted for real guitar quite easily.

[joegagan]

[mac]

Colorsound Inductorless Wah

http://beavisaudio.com/Projects/ColorsoundWah/index.htm

R8 should be 470 omhs, not 33k.

mac

[sajy_ho]

Ibanez WH10. Doesn't need an inductor and sounds very similar to old wah pedals:
http://tagboardeffects.blogspot.com/2013/01/ibanez-wh10.html?m=1

[deadastronaut]

Search "LOWAHT"  by earthscum tiny one tranny wah...nifty.  

or morley classic wah...very simple opamp wah...tweak caps for bass...

[punkbass]

hey, thanks everyone. i think i'm going to use the Lefty Idiot Wah, because those parts are also already available at where i'm going to make it.
can't wait to get started, i wil use a 2.5x2.5 inch velleman testboard, since i've used that type of board before for some distortions i build.
One question left: Should i make the caps bigger because it's a bass??

[antonis]

If you refer to In and OUT caps, yes  - but I think (not calculate) their current values are quite OK for bass..