GuitarPCB Fuzzy Bee v2 Manual

GuitarPCB.com Presents
Fuzzy Bee v2 (Pump’d Up Edition) Build Instructions
Board Dimensions (W x H) 2.13” x 1.67” i.e.: 54.0mm x 42.4mm. This design will fit into a 1290NS/1590B size enclosure
or larger. We recommend a 125B enclosure or larger for beginners. This board allows you to make a modernized version
of the BuzzaroundTM fuzz pedal and includes a charge pump so that you can use PNP transistors and still share a power
supply with other circuits or pedals.
This board has 9mm PCB-mounted potentiometers, which mount to the under-side of the board. Later in this document, a
drilling template will be provided to assist you in drilling your enclosure accurately. If your holes are a little off, and the pots
do not fit, please enlarge the holes with a file or a larger drill bit. Absolutely do not force the pots into the holes, or you
may break the circuit board. You may also use wired pots and arrange them knobs in your enclosure to suit your personal
preferences.
IMPORTANT NOTES
● For the transistors, we recommend GuitarPCB.com matched PNP Tone Bender sets. If you acquire a
Tone Bender set elsewhere, please make sure they are PNP, not NPN, and have low leakage (<.3mA).
● The board is printed showing the correct orientation for a vintage 2n404, 2n1305, 2n1307, etc. If you
use a different transistor, it is critical that you check your transistor’s datasheet and verify the pin
orientation.
● Any charge pump that adheres to the 7660S or 1044 pinout may be used, as long as it has a frequency
boost for pin 1. If you use an older 7660 (no S), you will likely hear noise in the circuit from the charge
pump.
● The board mounted 9mm pots are available at various sources. The model required for this project is
shown at some suppliers with another “1” within the part number, e.g.: RD901F-40-15R1-5k. If you do

not want to use board-mounted pots, you don’t have to. You can wire regular 16mm pots to the pads
provided, for example, but the drilling template in these instructions won’t work with larger pots.

WIRING DIAGRAM
STATUS LED
D3 is a common anode bi-color LED. The diagram at right shows
the pin-out, schematic symbol and pad connection for a common
anode LED. The pin-out for the bi-color LED is typically (but not
always) as follows:
1st Color Cathode
Is on the “flat” side of the
LED (see graphic); 90
degree bend in the lead
Common Anode
Middle lead
2nd Color Cathode
45 degree bend in the lead
The lead 1 pad on the circuit board is marked with a white box.
When connected correctly, the LED will light red when power is applied and the circuit is in bypass mode. The LED will
light green when in effects mode. If you wish to use a standard LED, connect the anode to the middle pad and the

cathode to the right pad to show the circuit in effects mode. If you use a 3PDT wiring board that includes an LED, you can
omit this LED and R10.
PART LIST
Part
Value
Comments
R1
100k
1/4 W
R2
470k
1/4 W
R3
10k
1/4 W
R4
10k
1/4 W
R5
3k3
1/4 W
R6
27k or 24k
1/4 W
R7
15k
1/4 W
R8
10k
1/4 W
R9
1M
1/4 W
R10
1k8
1/4 W
BALAN
CE
B5k
Alpha RD901F-40-15R-5k at Small Bear
SUSTAI
N
B100k
Alpha RD901F-40-15R-100k at Small Bear
TIMBR
E
B100k
Alpha RD901F-40-15R-100k at Small Bear
D3
Bi-Color CA
LED
Common Anode (see text)
IC1
7660S,
*1044*
Any charge pump with frequency boost for
pin 1
D1
1n34a
Germanium Diode
D2
1n4001
General Purpose Diode
C1
100n
Box Capacitor, 16+V
C2
4µ7
Electrolytic Capacitor, 16+V
C4
4µ7
Electrolytic Capacitor, 16+V
C5
1n
Box Capacitor, 16+V
C6
100n
Box Capacitor, 16+V
C7
47µ
Electrolytic Capacitor, 16+V
C8
10µ
Electrolytic Capacitor, 16+V
C9
47µ
Electrolytic Capacitor, 16+V
Q1
PNP Ge*
See Text
Q2
PNP Ge*
See Text
Q3
PNP Ge*
See Text

DRILLING TEMPLATE When printed, this should be (W x H): 4 7/16” x 6 ½” or 113mm x 165mm.
This drawing provides an example guide for drilling a 1290NS/1590B enclosure and assumes you are using the
board-mounted pots (see parts list for model). Hole diameters are not exact in this image, so please measure your
components before selecting a drill bit. Locations are approximate, and may need to be adjusted for different
styles/models/brands of components, so verify before using.
Need a kit? Check out our authorized worldwide distributors:
USA – Check out PedalPartsAndKits for all your GuitarPCB kit needs in the USA.
Europe – Das Musikding Order either boards or kits direct from Europe.
PedalPartsAustralia - Order either boards or kits direct from Australia
This document, PCB Artwork and Schematic Artwork © GuitarPCB.com. Schematic, PCB and this
document by Bruce R. and Barry. All copyrights, trademarks, and artworks remain the property of their
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