Spring Reverb module for my DIY Modular Synthesiser, after Ray Wilson of Music From Outer Space’s design. Uses a salvaged spring tank.

While visiting my local makerspace and browsing the “junk shelves”, I spotted a spring reverb tank, so I took it home for later use.

Not much later, I found that Ray Wilson of Music From Outer Space developed one more module before he sadly passed away. It happened to be a reverb module for use with a spring tank.

This module is essentially directly that circuit design, with perhaps minor modifications to account for my system’s different power supply.

It offers input level control, and two voltage-controlled amplifiers controlling how much of the original (“dry”) signal, and how much of the “wet” signal makes it to the “mix out”.

Work Involved

• Little bit of circuit design
• Schematic capture (KiCad)
• PCB design (KiCad)
• Panel design (Inkscape)
• Laser cutting at local makerspace
• PCB assembly (through-hole soldering)
• Panel assembly
• Wiring to reverb tank

Here’s a view from the back, showing the board:

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All design files can be found on GitHub: Reverb module