"Little Angel" - Super Simple PT2399 Mini Chorus

[Earthscum]

Holy wow! Ok, I hear what you're talking about now. That's definitely a mod I'll be using... and refusing to my buddies! I gotta keep my rig sounding the kewlest... 

Hats off to both of ya!

[$uperpuma]

This is very cool.  Breadboard time!

[~arph]

And give the changes in post #81 a try 

[frequencycentral]

try this:  remove the 1n cas between 13-14 and 15-16: no audible difference -> saves two components

I could remove the 13/14 cap without trouble, but removing the 15/16 cap caused noise. Haven't played with the other values yet.

Little mod for anyone who's interested try changing the resistor connected to pin 15 to 22k, that makes the wet side a bit louder and sounds more chorusy to me. It might mess with to overall level though.

Yes this certainly works! Although the effect is now higher than unity, but easily tamed back.

[~arph]

You can make it more vibey if you apply some of that modulation to pin six too 
The 22k in the input stage mod works really well too..

[culturejam]

The 22k in the input stage mod works really well too..

Which resistor are you referring to? By that I mean which part number on the Little Angel schematic are you referring to?

Thanks

[slacker]

It's R5 on the layout, the 10k connected to pin 15 of the PT2399.

[Brymus]

This just keeps getting better and better....
Nice build and clips Forrest !!

[Talison]

how about a Vero layout?   

[Brymus]

Hope this isnt a dumb question  
But what about adding the Taptation controller that TTG just released ?
Would that allow the phasing/modulation to be "controlled" a bit more ?

EDIT posts =  1111  

[culturejam]

It's R5 on the layout, the 10k connected to pin 15 of the PT2399.

Thanks!

[Renegadrian]

how about a Vero layout?   

I was working on it, but Rick adviced it's better to have a definitive version and not a work in progress.
As soon as we can say "that's the final version" I am gonna finish my vero layout.

[frequencycentral]

how about a Vero layout?    

I was working on it, but Rick adviced it's better to have a definitive version and not a work in progress.
As soon as we can say "that's the final version" I am gonna finish my vero layout.

I think what we've got now is close enough already. After all, a verified PCB layout now exists, so why not a vero?

So that's the LITE version wrapped up, give or take a few values here and there. So what features do we want in the ELITE version?

[culturejam]

So that's the LITE version wrapped up, give or take a few values here and there. So what features do we want in the ELITE version?

Adjustable max delay time. 

[zambo]

Thanks for this cool project Rick.
P.S. I also believe that you are an alien

[Renegadrian]

how about a Vero layout?    

I was working on it, but Rick adviced it's better to have a definitive version and not a work in progress.
As soon as we can say "that's the final version" I am gonna finish my vero layout.

I think what we've got now is close enough already. After all, a verified PCB layout now exists, so why not a vero?

All right, I'll post it in some days then!!!

[culturejam]

Another idea for the ELITE version:

How about a toggle switch to apply the LFO wobble to pin 6 as well as pin 2?

And what about having a trimmer + resistor in place of the 100K resistor to ground on the output? Could be like a "level" control of sorts to help match unity volume.  Unless you already have output volume control via op amp in the works for the Elite.

[Brymus]

Why not a set of filters to pass the mids and/or bass through un-modulated with a blend control ?

[Earthscum]

How about a toggle switch to apply the LFO wobble to pin 6 as well as pin 2?

And what about having a trimmer + resistor in place of the 100K resistor to ground on the output? Could be like a "level" control of sorts to help match unity volume.  Unless you already have output volume control via op amp in the works for the Elite.

I tried it. Didn't really do much. Gotta build a second LFO for it to modulate at different speeds, then you would notice a difference.

Also, I just used a 100k volume pot and started it out on high, like 100k to ground. I ended up having to turn it down a hair (to probably about 75k) to hit unity. I'm also using a bass to test this (since that's what I'm building it for), and noticed the B and E strings don't get as much of the effect as A and higher.

I noticed, though, that my 500k pot only had about 1/8 turn as usable range... after I dropped the 33k. With the 33k in place, I was getting no wobbling. I triple checked everything, so not sure why it does this. Also, my 100k has only about 1/4 usable area. I'm done with it for the night, but if anyone has any suggestions, I'll try them out tomorrow.

Edit to add: I'm using TL072. Could this be part of it? All I have on hand at the moment is TL072's & 4's, 741's, TL082's, and LM324's.

[frequencycentral]

I have given my permission for guitarpcb.com to do a run of PCBs:

http://www.guitarpcb.com/apps/webstore/products/show/1690146