Based on R.G. Keen's schematic, this...
A great sounding chorus pedal, based on the PT2399, designed to fit in a small enclosure.
My daughter melts my heart when she asks me to "Up, Down, Daddy!" when throwing her up into the air and catching her. I figured this was a perfect name for an octaver with 1 octave up and 1 and/or two octaves down.
Please note, this requires the VTL5C4/2. It's very difficult to find.
Be sure to get all the additional parts while you're here. They're not exactly the easiest to obtain.
A microcontroller used to set the waveform, speed, depth, etc., of the LFO.