Akashic Guitar effects PCB lookup
GAINHIGHLOWVOLUME

125B · 4 knobs

PCB Guitar Mania

Grumpy Capuchin

Based on the DigiTech Bad Monkey

Category
Overdrive
Controls
Gain · High · Low · Volume
Difficulty
Moderate
Price
€11.90out of stock

Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.

From the vendor

Project overview

We proudly announce our newest PCB inspired by that Digitech pedal you never cared about!

Renamed by you guys as Grumpy Capuching, this Bad Monkey Overdrive-inspired pedal is ready to jam.

Introduction

Nobody was paying too much attention to the Bad Monkey Overdrive, a Chinese-made DigiTech pedal from the early 2000s. It was one of those overdrives that go under the radar that, at the time, you could easily buy it used for $60.

That changed when Josh Scott uploaded a video in early 2023 showing that this two-decade-old pedal could sound just as good as the mythical Klon Centaur and similar circuits valued over three and even four figures.

As soon as the JHS video hit the scene, the Bad Monkey went from zero to hero. Suddenly, everyone wanted a piece of this discontinued pedal, and the asking prices went bonkers. Some folks had the audacity to slap price tags of 600, 700, and even over a grand on these pedals. Madness!

We think Scott had a message to deliver, loud and clear. Forget the hype and trust your own ears and instincts when it comes to pedals. At the end of the day, it’s all about what brings you joy while jamming. Isn’t that the whole point, anyway? That’s why we bring you a DIY version of this Bad boy, which is a great pedal, after all. This Grumpy Capuching is primed and ready to jam!

Controls

Potentiometers

• GAIN

• HIGH

• LOW

• VOLUME

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

Grumpy Capuchin – Building Docs

Grumpy Capuchin – Drilling template

Schematic

The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 53 rows

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RefValueNormalizedTypeNotes
Resistors 24
R11m1M
R21k1k
R31m1M
R410k10k
R51k1k
R610k10k
R7100k100k
R81k1k
R95k5k
R10100k100k
R115k5k
R1210k10k
R1322k22k
R141k1k
R15100k100k
R1622k22k
R17100k100k
R1810k10k
R19100k100k
R20100r100
R2110r10
R224k74.7k
R2327k27k
R2427k27k
Capacitors 15
C1047p47p
C16100n100n
C1110u10u
C1310u10u
C14100u100u
C15100u100u
C1120p120p
C247n47n
C3220n220n
C4470n470n
C5220p220p
C647n47n
C747n47n
C847n47n
C9470n470n
Diodes 4
D141484148
D241484148
D31n58171N5817
D43mm3MM
Transistors 3
Q1J201J201
Q32N39042N3904
Q2flippedFLIPPED
ICs 2
IC145584558
IC245584558
Potentiometers 4
GAIN100KBB100kPotentiometer
HIGH100KBB100kPotentiometer
LOW100KBB100kPotentiometer
VOLUME100KAA100kPotentiometer
Jacks & sockets 1
J201Q1Q1