This is a tiny (ca. 19x19mm) PCB to build a clone of the Electro Harmonix LPB1, Screaming Bird or Hogs Foot.
It is perfect as an add-on to add gain or volume to an existing pedal with an internal trimpot.
Of course you can also build a stand alone pedal with a potentiometer.
This version allows a build with 7.5mm Resistors and makes easier to build it as a bass-, or treble-booster.
Have fun!
You can also get this as a kit from Musiking here