Loophole loFi-looper

[thomasha]

Hi, it has been a long time, but I finished the loophole in a 1590LB box build.
I used the changes I suggested here:
https://www.madbeanpedals.com/forum/index.php?topic=34223.msg328020#msg328020
I used two boards for this build, one for the potentiometers and the LFO and one for the main effect.
While putting it together I noticed that my board layout was not optimal, if you consider the placement of jacks and switches.





Cheers, Thomas

[jessenator]

you absolute wizardly madman! Impressive shrinkage you've got going on there. Love the design, too. That's etched, yeah?

[jimilee]

Hey Thomas, can you refresh my memory on the loophole?


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[thomasha]

That's etched, yeah?

Yes! And filled with black paint, so that it gives a good contrast.

Hey Thomas, can you refresh my memory on the loophole?

The loophole follows the same concept of zvex's LoFi loop, using a different answering machine IC.
The PDF I have is from 2015, once there was a board for it, now you can only find it here
https://www.madbeanpedals.com/projects/archives/index.html

Mine follows this modification, which adds the wobbling by oscillating around the supply voltage of the main IC:
I skipped the detune and depth functions, though. 

[madbean]

I always meant to get back to this one. I remember I had come up with an idea to do sound on sound / layering. Just never got around to doing anything with it.

Anyway, your build is sick!

[nzCdog]

Wow... that's amazing.   

[gordo]

I have nightmares about these sorts of enclosures...

[Bio77]

<mind blown emoji> 

Are the solder brides on the ISD chip the jumpers on the tagboard layout? 

[thomasha]

Are the solder brides on the ISD chip the jumpers on the tagboard layout?

Yes, the ISD I used is the ISD2560, and it has several pins that are connecter together. Since I used the SMD version, it all got together in a big lump of solder.

I always meant to get back to this one. I remember I had come up with an idea to do sound on sound / layering. Just never got around to doing anything with it.

I tried something like that when messing with the ISD1720. Unfortunately it had a beep every time the recording restarted. It would require way more switches, though.

[JakeFuzz]

Wow that looks great! I cant believe you were able to fit all that in such a small enclosure. Most excellent build.

[jimilee]

Wow that looks great! I cant believe you were able to fit all that in such a small enclosure. Most excellent build.

He put a DMM in one of those, I'm sure this was a walk in the park.


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[thomasha]

Some late night noodling:

In the video I placed a distortion pedal after the looper, since it filters the high end.
In my opinion, the sound is better when the recording was done with a clean guitar.

[nzCdog]

That modulation sounds sweet!