Author Topic: Another Inductorless Wah, now with Sallen-Key filter  (Read 648 times)

thomasha

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Another Inductorless Wah, now with Sallen-Key filter
« on: August 22, 2017, 10:28:03 AM »
Hi guys!
Have another cool project for you.
The guy over http://cackleberrypines.net/transmogrifox/TransmogriNotes/skwah/index.html
came with this idea and presented all the simulations and results.

If you remember, I built a colorsound wah, but it wasn't that intense as the other circuits that do use an inductor.
So I gave it a try, and now here is the result>



It really sounds better than the colorsound wah. I still need to make a comparison video, but until then, here is a short video of it. I'm still learning how to control a wah, for the second time...

<a href="http://www.youtube.com/watch?v=n7Od-5ri3T8" target="_blank">http://www.youtube.com/watch?v=n7Od-5ri3T8</a>
Hope you like it!
I made a small file for it, but it's not as good as the madbean documents.
https://www.4shared.com/office/NSk921Alca/Inductorless.html

Cheers,
Thomas

jimilee

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #1 on: August 22, 2017, 10:59:37 AM »
That's really cool


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m-Kresol

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #2 on: August 22, 2017, 11:34:51 AM »
I had a behringer wah that worked on a system like that. I slaughtered it for the enclosure though.

Love what you did, especially using a 1590A is impressive (i know, that is probably a big enclosure for you ;)) and using its cover as the rocker is a great idea. Also, the graphics on top fit perfectly.
I build pedals to hide my lousy playing.

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pickdropper

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #3 on: August 22, 2017, 01:37:53 PM »
I kinda love this.
Etymotic Research, Function f(x)

m-Kresol

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #4 on: August 22, 2017, 01:47:38 PM »
just had a look at your pdf instruction. looks like the protection diode is in the wrong way. thanks for your efforts
I build pedals to hide my lousy playing.

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thomasha

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #5 on: August 22, 2017, 03:59:08 PM »
wait, I thought the cathode should go to 9v, so it won't flow to ground and short the circuit.
I checked my eagle file and it seems right

WAXOU

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #6 on: August 22, 2017, 05:07:37 PM »
Nice ! I Think Georges Dennis wah were also inductorless (at least the the one that I own is).
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wgc

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #7 on: August 22, 2017, 06:21:44 PM »
Totally love it. Had a small home built wah shell on the to do list forever. Very inspiring.
always the beautiful answer who asks a more beautiful question.
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Philthy

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #8 on: August 23, 2017, 01:35:51 AM »
great work

287m

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #9 on: August 23, 2017, 04:42:23 AM »
in 1590A with badass etch like that? awesome!

btw, why i can't download in 4shared? countdown timer not running :(

mrclean77

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #10 on: August 23, 2017, 04:56:18 AM »
That is awesome! The etch is sharp and the circuit sounds great - I also love the fact that in the OP you glossed right over it being in a 1590A!!!

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Martan

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #11 on: August 23, 2017, 06:54:12 AM »
Looks great! nice work.

thomasha

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #12 on: August 23, 2017, 10:48:55 AM »
I started to use 4shared after the dropbox public folder wasn't working anymore.
Maybe if I share the dropbox link?
https://www.dropbox.com/s/oa0mw54go3gx6pl/Inductorless.pdf?dl=0

m-Kresol

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #13 on: August 23, 2017, 01:14:06 PM »
wait, I thought the cathode should go to 9v, so it won't flow to ground and short the circuit.
I checked my eagle file and it seems right

you are totally correct and it is also correct in your eagle files. It seems I had a brainfart yesterday, sorry.
I build pedals to hide my lousy playing.

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PhiloB

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Re: Another Inductorless Wah, now with Sallen-Key filter
« Reply #14 on: August 23, 2017, 03:04:12 PM »
That etch is awesome


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