Fuzz Factory

The Fuzz Factory is a five-knob fuzz pedal with huge range of sound possibilities. This is classic DIY pedal project that can be built with either germanium or silicon transistors.
Steps

Created by DHEA
Status: Active
6ad5cfedb16d6a272994ad5c2b2b82c7?s=30

Designators and components Step 2 of 4

COMPONENT LIST 

PCB
FUZZ FACTORY DIY PCB GUITAR EFFECT
Capacitors        
C1    10u     10UF 25V 105C RADIAL ELECTROLYTIC CAPACITOR 5X11MM
C2    100n     100NF 0.1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C3    10u     10UF 25V 105C RADIAL ELECTROLYTIC CAPACITOR 5X11MM
C4    10u     10UF 25V 105C RADIAL ELECTROLYTIC CAPACITOR 5X11MM
C5    47u    47UF 50V 105C RADIAL ELECTROLYTIC CAPACITOR 6X11MM
Diodes        
D1    LED     LED 3MM GREEN  
D2    1N4001     1N4001 DIODE 1A 50V
Transistors
Q1    2N3904     2N3904 NPN GENERAL PURPOSE TRANSISTOR
Q2    2N3906     2N3906 PNP GENERAL PURPOSE TRANSISTOR
Q3    2N3906     2N3906 PNP GENERAL PURPOSE TRANSISTOR
Q2/Q3   Socket    40 PIN 2.54MM DIP SIP IC SOCKETS ADAPTOR SOLDER TYPE
Resistors        
R1    220k    220K OHM 1/4W 1% METAL FILM RESISTOR
R2    10k    10K OHM 1/4W 1% METAL FILM RESISTOR
R3    470    470 OHM 1/4W 1% METAL FILM RESISTOR
R4    47k    47K OHM 1/4W 1% METAL FILM RESISTOR
R5    5.1k    5.1K OHM 1/4W 1% METAL FILM RESISTOR
R6    220k    220K OHM 1/4W 1% METAL FILM RESISTOR
R7    1M    1M OHM 1/4W 1% METAL FILM RESISTOR
R8    1.5k    3.3K OHM 1/4W 1% METAL FILM RESISTOR
Potentiometers        
STAB    5k-B    5K OHM LINEAR TAPER POTENTIOMETER
VOL    5k-B    5K OHM LINEAR TAPER POTENTIOMETER
COMP    10k-B    10K OHM LINEAR TAPER POTENTIOMETER
DRIVE    10k-B    10K OHM LINEAR TAPER POTENTIOMETER
GATE    10k-B    10K OHM LINEAR TAPER POTENTIOMETER

 

PCB

 

TRANSISTORS

You can build this pedal with either germanium or silicon transistors. Follow the figures for the correct position of the transistors.

Germanium transistors: Q2 AC128 (Hfe 60-80) - Q3 AC128 (Hfe 100-120)

Silicon transistors: 2N3906

 

GENERAL DESCRIPTION OF COMPONENTS

Resistors

The resistors should be ¼ Watt metal type. You can either use a multimeter or the color bands to obtain their values. Resistors do not have polarity, you can place them in any direction.

Electrolytic capacitors

Electrolytic capacitors have their value printed on them. The negative polarity pin is indicated by a white strip along the can. They also have a longer leg indicating the positive pin. The maximum voltage rating never can be exceeded, make sure you are using at least double voltage rating than your power supply. For example, if you are using a 9V power supply, use a electrolytic capacitor with at least 18V maximum voltage rating.

Polyester capacitors

The polyester capacitors have their value marked with three numbers. Read as picofarads (pF), the first two are the 1st and 2nd digits and the third is the multiplier code. These capacitors do not have polarity, you can place them in any direction.

Ceramic capacitors

The ceramic capacitors have their value marked with three numbers. Read as picofarads (pF), the first two are the 1st and 2nd digits and the third is the multiplier code. These capacitors do not have polarity, you can assemble them in any direction.

Diodes

Diodes have their model printed on them. The polarity (cathode) is indicated by the ring near the side. This ring is also marked on the PCB.

Led diodes

Led diodes have polarity, the cathode is indicated as a flat surface on the side of the diode and also it is the shorter led. On the PCB, the cathode is marked as a flat side and anode as a round side.

Transistors

Transistors are three terminals components and their model is printed on them. To indicate the correct orientation, one side of the transistor is flat and the other one is round.

Potentiometers

Potentiometers have their resistance value marked on them. They are marked with A, B or C for logarithmic, linear and reverse logarithmic, respectively.