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Luna Optical Tremolo

Based On
4ms Tremulus Lune
Effect Type
Build Difficulty
Project Summary
An all-analog tremolo featuring six knobs for fine control over every aspect of the waveform.

Complete Kit

What's included?
PCB, finished enclosure, hardware,
and all electronic components.


In stock

Luna Optical Tremolo printed circuit board

PCB Only

What's included?
Just the PCB. Build instructions and parts list can be viewed or downloaded from this page.


In stock

Project overview

The Luna Optical Tremolo is a modified version of the 4ms Tremulus Lune, a classic DIY optical tremolo circuit that allows fine-grained control over the LFO shape.

Several of the Tremulus Lune circuit’s optional modifications are included standard in this PCB, including the Symmetry control as well as an external gain adjustment control so you can achieve unity volume with any setting.

The Luna adds a few improvements to the original design, including an input buffer to reduce noise and some added filtering to counteract ticking from the LFO. All of the knobs are located on the front panel in an efficient layout that is easy to build.

The new version of the Luna now uses standard 16mm potentiometers, which should make it easier to source parts than the last version. It also now has the Rate LED integrated into the footswitch board.

Demo Video

Check out RJ Ronquillo’s demo video of the Luna Optical Tremolo.
Watch on YouTube →