The EchoPathetic was designed by FSB member Allesz (designer of the Crap-Fi Delay and Dirty Punk Repeater). His previous designs use the PT2399 delay chip, but this one is full analog. There's an input buffer based around one side of TL072, then the signal goes onto the 3102 and 3205 chips. It's designed to be a buffered effect with the footswitch just turning on and off the delay section, but I figure more people will want to build it with true bypass. For more info, check out this thread over on FSB.
This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.