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DEPTHSPEEDBIAS

125B · 3 knobs

PCB Guitar Mania

Zombie Choir II

Based on the Zombie Chorus II

Category
Vibrato / Chorus· Analog Chorus/Vibrato
Controls
Depth · Speed · Bias
Difficulty
Advanced
Price
€11.90out of stock
Tags
diy-originals

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

The Zombie Chorus is one pedal you’ve never heard of outside the DIY pedals community, but it’s definitely a classic that deserves a place on each player’s pedal board. This circuit was originally designed by John Hollis and has been updated and improved through the years on many online forums.

Here you have our latest version ready to build, so you can make your analog dreams come true with this powerful brain eater Chorus/Vibrato!

Introduction

This one is a circuit you cannot buy as a pedal. This makes it rare to own and gives you tones that non-DIY consumers will never have in their hands. The schematic has been around the DIY community for years, and it is pretty fun to mess with. So we simply added every mod we could research to give you all the possible options this weird wobbling twangy chorus can give. Our design comes with two toggles to let you choose between chorus and vibrato. Normal mode or its own clone setting. I cannot wait to get feedback on how you guys like it!

Controls

Potentiometers

• Depth

• Speed

Switches

• Chorus/Vibrato Toggle

• Normal/Clone Toggle

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.

Zombie Choir II 1v2 – Building Docs (15th December 2022)

Zombie Choir II 1v2 – Building Docs (1st October 2022)

Zombie Choir II 1v1 – Building Docs (6th October 2022)

Zombie Choir II 1v1 – Building Docs (26th July 2022)

Zombie Choir II 1v0 – Building Docs (13th October 2021)

Zombie Choir – 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 45 rows

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RefValueNormalizedTypeNotes
Resistors 22
R11M1M
R210m10M
R347k47k
R4100k100k
R510k10k
R6100k100k
R747k47k
R847k47k
R947k47k
R1010k10k
R111M1M
R1210k10k
R13100k100k
R1468k68k
R154m70.0047
R1647k47k
R17100k100k
R184k74.7k
R1910k10k
R2010k10k
R214.7k4.7k
R236k86.8k
Capacitors 14
C11n1n
C21n1n
C3220pf220p
C42n22.2n
C61n1n
C81n1n
C910n10n
C51u1u
C747u47u
C10100u100u
C1110u10u
C12100u100u
C133u33.3u
C151u1u
Diodes 1
D01n58171N5817
ICs 5
IC1TL062TL062
IC2MN3207MN3207
IC3jrc4558JRC4558
IC44046N4046N
IC578L0978L09
Potentiometers 3
DEPTH100KAA100kPotentiometer
SPEED100KAA100kPotentiometer
BIAS10K10kPotentiometer