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Abyss

Earthquaker Devices The Depths Clone - June 2020

Abyss

This is a build of the Pedal PCB Abyss Univibe. The circuit is a clone of Earthquaker Devices' The Depths. Univibe is a form of modulation, similar to a chorus effect, but it is unique in that it is optically controlled. Inside of the pedal enclosure there is a pulsing LED surrounded by four light-dependent resistors (LDRs), and these LDRs control the modulation effect. The result is a throbbing, underwater-like effect that is shown in this demo.

The Circuit

Abyss Schematic

Photos

Abyss
Abyss Interior

Components

Resistors:

  • 1 x 100
  • 2 x 3K3
  • 2 x 4K7
  • 3 x 10K
  • 1 x 15K
  • 1 x 22K
  • 8 x 47K
  • 1 x 56K
  • 3 x 100K
  • 2 x 220K
  • 2 x 1M
  • 1 x 2M2

Capacitors:

  • 1 x 100pF
  • 1 x 470pF
  • 1 x 4.7nF
  • 1 x 15nF
  • 1 x 100nF
  • 1 x 220nF
  • 5 x 1uF
  • 1 x 10uF
  • 2 x 47uF
  • 1 x 100uF

Semiconductors

  • 1 x 1N5817
  • 2 x MPSA18
  • 1 x TL072
  • 1 x TL074
  • 4 x 5mm Radial LDR (KE-10720)
  • 1 x 5mm Yellow LED
  • 1 x 3mm Red LED

Potentiometers

  • 1 x B10K
  • 2 x B25K
  • 1 x A100K
  • 1 x B100K Dual-Ganged