aion HADRON Manual
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aion HADRON Manual

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PROJECT NAME
HADRON
BASED ON
Lovepedal Eternity
EFFECT TYPE
Overdrive
PROJECT SUMMARY
An early entry in the minimalist Tube Screamer category, this was one of the circuits that kicked off the
hand-built boutique pedal industry.
Actual size is 2.3" x 1.86" (main board) and 1.79" x 0.86" (bypass board).
HADRON DYNAMIC OVERDRIVE
BUILD DIFFICULTY
Beginner
DOCUMENT VERSION
1.0.0 (2019-08-04)
1

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Summary of Contents for aion HADRON

  • Page 1 An early entry in the minimalist Tube Screamer category, this was one of the circuits that kicked off the hand-built boutique pedal industry. Actual size is 2.3” x 1.86” (main board) and 1.79” x 0.86” (bypass board). HADRON DYNAMIC OVERDRIVE...

  • Page 2: Table Of Contents

    This makes it interact better with a guitar’s volume & tone knobs, but on the flip side it also interacts with the pedals that come before & after. Alongside the Azimuth, the Hadron has among the lowest parts count of any Aion FX project and is a very good starting point for new builders.

  • Page 3: Parts List

    Jumper for base Eternity version. 1N914 for Burst version. 1N914 Fast-switching diode, DO-35 1N914 Fast-switching diode, DO-35 1N914 Fast-switching diode, DO-35 LM833N Operational amplifier, DIP8 Exact IC is unknown. See build notes. IC1-S DIP-8 socket IC socket, DIP-8 HADRON DYNAMIC OVERDRIVE...
  • 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. HADRON DYNAMIC OVERDRIVE...

  • Page 5: Build Notes

    The 330R resistor in series with the power supply will drop the voltage to the pedal and is part of the key to the sound. Some variants of the Eternity used 390R here. However, due to the slight ~0.2V voltage drop from D1 that was not present in the original, it’s recommended to stick with 330R. HADRON DYNAMIC OVERDRIVE...

  • Page 6: Schematic

    SCHEMATIC 330R 1N5817 100uF 47uF 100n BYP_GND IC1A LM833N IC1B LM833N TONE OMIT 150n 150n 1N914 220n 100kB DRIVE HADRON DYNAMIC OVERDRIVE...

  • Page 7: Drill Template

    INCH 0.625” 0.625” ø3/8” ø3/8” ø1/2” VOLUME DRIVE x: -0.65, y: +1.71 x: 0.65, y: +1.71 ø9/32” ø9/32” TONE x: 0, y: +0.66 ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 ø5/16” ø15/32” HADRON DYNAMIC OVERDRIVE...

  • Page 8: Enclosure Layout

    ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B HADRON DYNAMIC OVERDRIVE...

  • Page 9: 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. HADRON DYNAMIC OVERDRIVE...

  • Page 10: 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 (2019-08-04) Initial release. HADRON DYNAMIC OVERDRIVE...

This manual is also suitable for:

Hadron dynamic overdrive

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