Poly-face

Project overview

Inspired on Electro Harmonix Polyphase. Ready to challenge yourself with a rare vintage unit?

Introduction

Welcome to the experimental guitarist’s paradise.  The Poly-face offers a level of interactivity way beyond a typical pedal to give you the most important thing: total control.

Its complexity enables you to have a level manage over the effects parameters that are not that far away from what a synthesizer can offer.

Not only does it deliver the classic phase sounds, but it also reaches new dimensions with its envelope filter mode. It is no beginner project for sure; controls for rate, feedback, envelope sensitivity, envelope modulation, and modulation rate plus a sweep toggle will do everything between funky envelope filter to Leslie-like rotary sounds.

Is it necessary to mention the enormous potential that this pedal hides behind these features?

Now let us go to the technical part; make sure you source your TL1054 from a trusted source. Also, keep in mind there are three optocouplers. If you decide to use LDRs and LEDs, you need to cover them (some guys put them in a heat sink tube) because otherwise, the light of one will affect multiple light-sensitive resistors at once.

Controls

• Mod
• Rate
• Sense
• Feedback
• Rate

For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Polyface – Building docs

Polyface – Drilling template