aion NOMAD Manual
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aion NOMAD Manual

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Table of Contents

PROJECT NAME
NOMAD
BASED ON
Valve Wizard Engineer's Thumb
EFFECT TYPE
Compressor
PROJECT SUMMARY
A full-featured yet surprisingly simple OTA-based compressor design that operates on a feed-forward
principle for better performance and lower noise.
Actual size is 2.3" x 1.86" (main board) and 1.78" x 0.87" (bypass board).
NOMAD OTA COMPRESSOR
BUILD DIFFICULTY
Easy
DOCUMENT VERSION
1.0.0 (2023-03-24)
1

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Summary of Contents for aion NOMAD

  • Page 1 1.0.0 (2023-03-24) PROJECT SUMMARY A full-featured yet surprisingly simple OTA-based compressor design that operates on a feed-forward principle for better performance and lower noise. Actual size is 2.3” x 1.86” (main board) and 1.78” x 0.87” (bypass board). NOMAD OTA COMPRESSOR...

  • Page 2: Table Of Contents

    2019. While most DIY projects are based on V1 or V2, the Nomad is based on this latest revision, with all of the suggested modifications for a true 5-knob compressor. It’s a simple and cheap build with a deluxe control set.

  • Page 3: Parts List

    Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 3.5mm Electrolytic capacitor, 4mm Electrolytic capacitor, 4mm 10uF Electrolytic capacitor, 5mm Reference voltage filter capacitor. 100uF Electrolytic capacitor, 6.3mm Power supply filter capacitor. 100n MLCC capacitor, X7R Power supply filter capacitor. NOMAD OTA COMPRESSOR...
  • Page 4 2.1mm DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. 3PDT Stomp switch, 3PDT BATT. 9V battery snap Soft vinyl type. The hard-shell type will not fit. 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. NOMAD OTA COMPRESSOR...

  • Page 5: Schematic

    SCHEMATIC IC1A 100k 1N5817 TL072P 100uF 10uF 100n GND GND IC3_BUF2 LM13700N IC1B TL072P 100pF IC3_BUF1 LM13700N RATIO IC3A LM13700N IC3B LM13700N RELEASE IC2B 500kB 100k TL072P ATTACK 10kA IC2A 100R 1N914 2N3906 TL072P NOMAD OTA COMPRESSOR...

  • Page 6: Drill Template

    +0.775, y: +1.71 ø9/32” ø9/32” ø9/32” LEVEL TREBLE RATIO x: -0.775, y: +0.41 x: 0, y: +0.41 x: +0.775, y: +0.41 ø9/32” ø1/4” ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 ø5/16” ø15/32” NOMAD OTA COMPRESSOR...

  • Page 7: Enclosure Layout

    ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B NOMAD OTA COMPRESSOR...

  • Page 8: Wiring Diagram

    GND +V +V JACK GND JACK GND 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. NOMAD OTA COMPRESSOR...

  • Page 9: Document Revisions

    (In other words: you don’t have to go out of your way to advertise the fact that you use these PCBs, but please don’t go out of your way to hide it. The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.0.0 (2023-03-24) Initial release. NOMAD OTA COMPRESSOR...

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