I've found a couple designs, but some have obsolete ICs. Are there any up to date looper schematics floating around out there? I've seen some loop A B boxes, but really all I need is a pedal that I can record riffs to and play them back live, like a one-man band kind of thing.
check out the Tone God's Pay Back pedal http://www.diystompboxes.com/smfforum/index.php?topic=46680.0 (http://www.diystompboxes.com/smfforum/index.php?topic=46680.0)
sounds like what you want.