Ojo Diablo – Eagle and Gerber Files

Product Format Clarification

This product includes digital design files only — no physical PCB is shipped.

With these files, you can order PCBs directly from a manufacturer (e.g., JLCPCB, PCBWay) for as little as $2 for 5 boards.
Typical production time is 3 days, and international shipping starts at $12, taking about 4 days via DHL to most locations.

You’re free to edit the design and add your own branding.

Upon Purchase, You’ll Receive:

• Eagle CAD files (.SCH & .BRD) — fully editable and compatible with KiCad

• Industry-standard Gerber files for PCB fabrication

• Quick-start guide explaining how to use the files

• Download link for the free version of Eagle CAD

After purchase, you will receive a payment link by email. Once the payment is completed, the design files will be sent to you within 8 hours. We’re currently working on automating this process, but for now, orders are handled manually.

Note: You must use these files with a PCB manufacturer to produce your boards.
No pre-assembled or pre-made circuit boards are included.

These design files are intended for personal use and small production runs of your own pedals, not for resale as kits or standalone PCBs.

For more details check our Youtube Tutorial on how to Use eagle and Gerber files and how to design PCBs here

Project overview

The Ojo Diablo! It is a versatile low to medium gain overdrive with an exceptionally dynamic response. It preserves the character of your instruments and is very sensitive to your playing technique.

Thanks to the effective and musical controls, the Diablo works equally well with any guitar, amp, or playing style.

Introduction

Definitely one of the most complete overdrives there’s out there! Featuring six potentiometers, six internal trimmers, and a headroom toggle, we can assure you that the Ojo Diablo! Is by far one of the most versatile overdrives ever built.

Controls

External Controls

• Feed: Pre-gain control, adjust the amount of bass in the input signal for a tight and transparent sound even with the fattest neck pickups
• Body: Takes effect on lower mids and compression. To the LEFT tight and open, to the RIGHT Fat and singing.
• Tone: Set your tone preferences all the way from dark to bright. You can further fine-tune its response with the internal trim pots.
• Gain: Controls the intensity of distortion. Set it to the desired level of distortion and roll back the guitar volume for cleaner tones.
• Level: Overall volume level of the pedal
• Level+: Controls the second gain settings. This control works in addition to the gain control, so if Gain is already on maximum, engaging the LEVEL + won’t give you any more distortion, just a slight fattening of the sound.
• Headroom Switch: Activates the internal Voltage doubler.

Internal Controls

• Presence: Controls High frequencies of the main section.
• Bass: Affects lower mids and bass frequencies of the main section.
• TRIM1: Originally a 100r resistor, this trimmer allows you to regulate the gain of Q3
• Tone+: Set the Tone response of the second section
• Bass+: Set the Bass response of the second section
• Gain+: This trimmer allows you to do the fine-tuning of the second section gain.

For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.

For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.

Ojo Diablo – Building Docs

Ojo Diablo – Drilling Templates