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PROJECT NAME
LUNA
BASED ON
4ms Tremulus Lune
EFFECT TYPE
Tremolo
PROJECT SUMMARY
An all-analog tremolo featuring six knobs for fine control over every aspect of the waveform.
Actual size is 2.3" x 1.86" (main board) and 2.3" x 0.86" (bypass board).
This documentation is for the PCB-only version of the project. The
but more specific in certain areas due to the customized hardware that is used.
LUNA OPTICAL TREMOLO
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.2 (2020-12-07)
IMPORTANT NOTE
full kit documentation
is similar,
1
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Summary of Contents for aion LUNA
- Page 1 Actual size is 2.3” x 1.86” (main board) and 2.3” x 0.86” (bypass board). IMPORTANT NOTE This documentation is for the PCB-only version of the project. The full kit documentation is similar, but more specific in certain areas due to the customized hardware that is used. LUNA OPTICAL TREMOLO...
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Page 2: Table Of Contents
10 Document Revisions INTRODUCTION 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. -
Page 3: Parts List
2.2uF Film capacitor, 7.2 x 5mm 330pF MLCC capacitor, NP0/C0G Film capacitor, 7.2 x 3.5mm Film capacitor, 7.2 x 2.5mm 10uF Electrolytic capacitor, 5mm Film capacitor, 7.2 x 2.5mm 100uF Electrolytic capacitor, 6.3mm Power supply filter capacitor. LUNA OPTICAL TREMOLO... - Page 4 DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. BATT Battery snap 9V battery snap Optional. Use the soft plastic type—the hard-shell type will not fit. 3PDT Stomp switch, 3PDT 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. LUNA OPTICAL TREMOLO...
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Page 5: Build Notes
The Luna adds an input buffer to counteract this. The default configuration from the parts list & layout is to use a JFET. However, due to the scarcity of TO-92 JFETs, the buffer can be configured to instead use a more common NPN bipolar transistor such as a 2N5088 or 2N3094 with only one resistor change. -
Page 6: Schematic
SCHEMATIC 100k 1N5817 100uF 47uF 100n 220k VACTROL_B IC2A 100kC TL022 RATE 10uF IC2B TL022 220k RATE_LED IC1B IC1A 2N5457 TL072 TL072 VACTROL_B 50kA VOLUME 330pF LUNA OPTICAL TREMOLO... -
Page 7: Drill Template
DEPTH SMOOTH x: 0, y: +0.41 x: -0.775, y: +0.41 x: +0.775, y: +0.41 ø9/32” ø9/32” ø9/32” CENTER (0,0) ON/OFF RATE FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 x: +0.775, y: -1.20 ø5/16” ø15/32” ø5/16” LUNA OPTICAL TREMOLO... -
Page 8: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B LUNA OPTICAL TREMOLO... -
Page 9: Wiring Diagram
GND +V +V JACK GND JACK RATE GND PCB 125B Shown with optional 9V battery. If battery is omitted, both jacks can be mono rather than one being stereo. Leave the far-right lug of the DC jack unconnected. LUNA OPTICAL TREMOLO... -
Page 10: Document Revisions
The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.0.2 (2020-12-07) Corrected inconsistent value for Volume pot between schematic and parts list (it should be 50kA). 1.0.1 (2020-11-02) Corrected wiring diagram to show missing wire for Rate LED. 1.0.0 (2019-03-14) Initial release. LUNA OPTICAL TREMOLO...
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