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Built in feedback loop
Posted: Tue Dec 27, 2011 2:02 am
by enjoyadrian
How does one go about adding a feedback loop to a pedal, a la the eau Claire thunder? I have a big muff I'm not using and think it would be cool to build it into the pedal as oppose to building a separate looper/feedback pedal to plug into.
Any help would be appreciated on the matter. I wish I could simply just buy the eau claire, but I just can't afford to
Re: Built in feedback loop
Posted: Tue Dec 27, 2011 2:20 am
by Bellyheart
A switch connection the input to the output. Add a knob for variance.
Re: Built in feedback loop
Posted: Tue Dec 27, 2011 2:25 am
by hazefuzz
maybe this could help,
Re: Built in feedback loop
Posted: Tue Dec 27, 2011 11:37 am
by Teej212
you could just put a wire connecting the input to the output. there are also going to be multiple points on the circuit that will oscillate when connected
Re: Built in feedback loop
Posted: Mon Jan 02, 2012 11:49 am
by eatyourguitar
the best way is a 500k or 1M pot, a SPST switch (any switch will work), connect the input to the output through the switch and the pot. if you use a 1M pot, you do not need the switch. however, one some pedals, they are so sensitive to feedback that it will still feedback like crazy with a 1M pot turned down. like if the guitar amp has input impedance of 3M and your feedback is only 1M resistance on a high gain pedal, your pedal will scream even though you don't want feedback. it follows the path of least resistance.
Re: Built in feedback loop
Posted: Mon Jan 02, 2012 5:24 pm
by enjoyadrian
I got this going last night. thanks guys.
Re: Built in feedback loop
Posted: Fri Jan 06, 2012 9:17 pm
by amishrobots
I can understand wanting it onboard, but personally, imo, if you're gonna build / modify something , i just think it makes more sense to go ahead and build a separate feedback looper; that way you can try it out on ANY of your pedals, not just the one. Feedback loopers are pretty simple things to build anyway, perhaps even easier than modding an existing pedal, depending on what it looks like in there. But it looks like you already started that project. Still, here is an circuit diagram for my FBL with both knobs and touch terminals included:
http://noisenoise.freeforums.org/fbl-feedback-looper-w-touch-controls-t95.html in case you want to build that too. Its a pretty simple build, and of course keep in mind that you can replace either the pots or the touch terminals with a photoresistor for light sensitive control, if you're into that sort of thing.