feedback looper

[mirmite]

Oh hai, i´m a circuit bender thaths pretty used to solder stuff and building circuits and i´m thinking of making a feedback looper, i foud these schematics from experimentalistsanonymous that iam thinking of using, but have some miner questions,
how shuld i connect the ground cabels fron send, return, out,?
and if there is any other way to build it thats better?
and i wanto use the dpdt switch, have seen a couple of other schematics without it.


http://experimentalistsanonymous.com/diy/Schematics/Buffers%20Switchers%20Mixers%20and%20Routers/Feedback%20loop.gif
Thanks

[fuzzo]

If you use a metal inclosure, no need to connect the ground. The box does the connexion with jacks (ONLY if you use open jack with a metal body)

The switch allows to use it like a simple looper ou AB box, when you switch on the out signal is sending to the input creating some weird sounds.

[mirmite]

first of all, thanks for the quick repley.
i did build a fast beta version, but dident get it to work, so i made a fast picture to show how the insides like, and colored it so people could easy see if i have missed someting.
its made out of a dvd casse, so i connected each ground to each other but i dident paint that on the picture, and i tested with one keyboard synthesizer and headphones, could that be the issue ? anyways here is the picture on the weiring.
but i get sound thrue but no effekt

[fuzzo]

It's a plastic box , right ?

plastic doesn't have a conductivity skill, so for this case you have to wire the ground between them.

[mirmite]

i have connected the ground cabels to eachother ^^
but coudent have those cabels on the picture, coz it would be harder to see the other cabels.
http://img.photobucket.com/albums/v239/Agent_jack/adw.jpg <- picture with ground cabels,
i still dont get any looping,

[Top Top]

It looks to me like you've got the ground from the input wired to the switch. Is there a reason for that?

[mirmite]

yes it is, i followed the schematics

[mirmite]

oh and i shuld probebly say that i use a 500 kohm log PCB stereo, have tryed with other ones aswell

[fuzzo]

Can you post a pic where we can see input/output/send/return ? Write them close to the wire on the pic.

That will be easier to help you.

[mirmite]

there you go

[decadentdesign]

Did you ever figure this out?  I just recently built a variation on the feedback looper and I don't seem to be getting much if any effect out of it.  Is it just not that pronounced maybe?  I did use a 500klinear pot instead of a log, but I would assume that should still work...

Just wondering if you figured it out.  Thanks!

[anchovie]

The success of a feedback looper depends on what pedals you put in the loop!