One Knob Fuzz

This is the One Knob Fuzz, a high gain fuzz with a very smooth response. This classic DIY project is very easy to build and delivers a fantastic fuzz sound.
Steps

Created by DHEA
Status: Active
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Designators and components Step 2 of 5

COMPONENT LIST 

PCB
PCB    ONE KNOB FUZZ DIY PCB GUITAR EFFECT

Capacitors        
C1    100n    100NF 0.1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2    220p    220PF 50V CERAMIC DISC CAPACITOR
C3    10u      10UF 50V 105C RADIAL ELECTROLYTIC CAPACITOR 5X11MM
C4    220n    220NF 0.22UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C5    47u      47UF 25V 105C ALUMINUM ELECTROLYTIC CAPACITOR 5X11MM PANASONIC

Transistors
Q1    BC109    BC109 BC109B NPN GENERAL PURPOSE TRANSISTOR
Q2    BC108    BC108 BC108B NPN SMALL SIGNAL TRANSISTOR

Resistors
R1    1M      1M OHM 1/4W 1% METAL FILM RESISTOR
R2    150k   150K OHM 1/4W 1% METAL FILM RESISTOR
R3    1k       1K OHM 1/4W 1% METAL FILM RESISTOR
R4    10k     10K OHM 1/4W 1% METAL FILM RESISTOR
R5    2.2k    2.2K OHM 1/4W 1% METAL FILM RESISTOR
R6    82       82 OHM 1/4W 1% METAL FILM RESISTOR

Potentiometer
VOL   500k-A    500K OHM LOGARITHMIC POTENTIOMETER
 

PCB

  

PCB SCHEMATIC

 

GENERAL DESCRIPTION OF COMPONENTS

Resistors

Resistors don't have polarity, so you can place them in any direction. Determine their resistance value by using a multimeter or by reading the color bands.

Electrolytic capacitors

Electrolytic capacitors have their value and maximum voltage rating printed on the body. The negative pin is indicated by a white stripe along the can, and it also has a shorter leg. The longer leg is positive. Never exceed the maximum voltage rating. Ensure the capacitor's voltage rating is at least double that of your power supply (e.g., use an 18V capacitor for a 9V power supply).

Polyester capacitors

Polyester capacitors don't have polarity and can be placed in any direction. Their value is marked using a three-number code. The first two numbers represent the first and second digits of the value, and the third number is the multiplier code (read in picofarads, pF).

Diodes

Diodes have their model number printed on them. The polarity (cathode) is indicated by a stripe or ring near one end. This ring corresponds to the polarity marking on the PCB.

Transistors

Transistors are three-terminal components with their model number printed on them. To ensure correct orientation, one side of the transistor's body is flat while the other is curved.

Potentiometers

Potentiometers have their resistance value marked on them. They are also marked with a letter to indicate their taper: A for logarithmic, B for linear, and C for reverse logarithmic.