madbeanpedals::forum

Projects => Build Reports => Topic started by: thomasha on October 22, 2023, 11:11:56 AM

Title: Loophole loFi-looper
Post by: thomasha on October 22, 2023, 11:11:56 AM
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 (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.
(https://i.postimg.cc/15cCqkRS/Photo-16-10-23-18-51-04.jpg)
(https://i.postimg.cc/nz0gBNGM/Photo-21-10-23-16-41-55.jpg)
(https://i.postimg.cc/MXkDQYNv/Photo-21-10-23-16-43-01.jpg)
(https://i.postimg.cc/GmFMvZcr/Photo-22-10-23-12-41-58.jpg)
(https://i.postimg.cc/7LqK9m6z/Photo-22-10-23-12-42-15.jpg)
Cheers, Thomas
Title: Re: Loophole loFi-looper
Post by: jessenator on October 22, 2023, 03:32:28 PM
you absolute wizardly madman! Impressive shrinkage you've got going on there. Love the design, too. That's etched, yeah?
Title: Re: Loophole loFi-looper
Post by: jimilee on October 22, 2023, 04:29:05 PM
Hey Thomas, can you refresh my memory on the loophole?


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Title: Re: Loophole loFi-looper
Post by: thomasha on October 22, 2023, 05:58:04 PM
QuoteThat's etched, yeah?
Yes! And filled with black paint, so that it gives a good contrast.

QuoteHey 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 (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:(http://i.imgur.com/ddX9Pb5l.jpg)
I skipped the detune and depth functions, though. 

Title: Re: Loophole loFi-looper
Post by: madbean on October 22, 2023, 07:42:55 PM
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!
Title: Re: Loophole loFi-looper
Post by: nzCdog on October 24, 2023, 09:39:31 AM
Wow... that's amazing.   :o
Title: Re: Loophole loFi-looper
Post by: gordo on October 24, 2023, 01:32:40 PM
I have nightmares about these sorts of enclosures...
Title: Re: Loophole loFi-looper
Post by: Bio77 on October 24, 2023, 02:39:46 PM
<mind blown emoji> 

Are the solder brides on the ISD chip the jumpers on the tagboard layout? 
Title: Re: Loophole loFi-looper
Post by: thomasha on October 24, 2023, 08:56:26 PM
QuoteAre 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.

QuoteI 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.
Title: Re: Loophole loFi-looper
Post by: JakeFuzz on October 26, 2023, 01:38:28 AM
Wow that looks great! I cant believe you were able to fit all that in such a small enclosure. Most excellent build.
Title: Re: Loophole loFi-looper
Post by: jimilee on October 26, 2023, 03:50:58 PM
Quote from: JakeFuzz on October 26, 2023, 01:38:28 AM
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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Title: Re: Loophole loFi-looper
Post by: thomasha on November 11, 2023, 01:36:05 PM
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.
Title: Re: Loophole loFi-looper
Post by: nzCdog on November 14, 2023, 07:44:27 PM
That modulation sounds sweet!