I've been working on my modular synth thing (despite some ordering mix-ups). I finished the board for the LFOs, but still need to hook up the wires for the pots and output. It uses a 40106 IC, 10k resistors, 4.7uf caps, some diodes, and (eventually) some pots. Its not the best looking thing in the world, but it will be hidden from the world in a box so it doesn't really matter. Unfortunately, I messed up half of the board from my first attempt at putting this thing together (poor planning and dissatisfaction with the capacitor values. Here is a picture: