Modded Doombutter.

[JakeFuzz]

Magic brought this pedal here over the weekend and I really like it. I think the mod possibilities for this thing are very good. FSB has a modified version called the clari not cubed which has an LFO but I haven't seen anyone add a feedback pot yet, which I think might be interesting. Here is the schematic, hopefully when I build this down the line I can test and verify some of these but someone may want to try it in the meantime. I am not too sure of the feedback pot or the lower limit resistor values but 50KB and 10K would be a good place to start. The LFO is just the modulation section from the Echobase that drives the same LDR as the existing LED.

[bigmufffuzzwizz]

Thanks for going ahead and doing this! As soon as I get a chance I'll experiment and see what I can come up with.
The one I built doesn't have that LFO at the bottom of the schem which would give this pedal more added fun but with the feedback knob it will do most of what I want it too!

[JakeFuzz]

Thanks for going ahead and doing this! As soon as I get a chance I'll experiment and see what I can come up with.
The one I built doesn't have that LFO at the bottom of the schem which would give this pedal more added fun but with the feedback knob it will do most of what I want it too!

I'm confident the LFO section will work. It is a pretty simple design. Definitely test out the feedback knob. I would start without the limiting resistor and just use like a 50KB pot in there to see what values will sound good and whether or not you even need a limiting resistor. Also test different return points. I am pretty sure the delay signal pull off point is good but the return might be better at another spot. I really just looked at the echobase to see what he was doing. The echobase also has clipping diodes on the return to degrade the repeats a little