HAO Sole Pressure

Here's HAO's take on the Distortion +/250 Preamp circuit. It uses LED clipping and features a Brilliance switch for normal, bright, and warm settings. A TL072 dual opamp is used, but on the original, only one side is used and the other is left unconnected. In this layout, I used the unused opamp for the voltage divider to give more stability there.

HAO Rust Driver

Here's another plexi-in-a-box pedal. Fairly simple in comparison to others. I've drawn 2 layouts for this one; one stock and one with an adjustable gain mod. The EQ switch is optional, as some who've built this circuit say it's pretty lackluster. The original uses an MC4558CN, but just about any dual op-amp should suffice (try JRC4558, TL072, NE5532, etc).