Les Lius

PCB DESIGNATORS

Resistors        
R1    1M         1M OHM 1/4W 1% METAL FILM RESISTOR
R2    3.3M      3.3M OHM 1/4W 1% METAL FILM RESISTOR
R3    Not placed
R4    3.3k       3.3K OHM 1/4W 1% METAL FILM RESISTOR
R5    330        330 OHM 1/4W 1% METAL FILM RESISTOR
R6    1k          1K OHM 1/4W 1% METAL FILM RESISTOR
R7    Not placed
R8    Jumper
R9    Not placed

Capacitors        
C1    47n       47NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2    47u       47UF 25V ELECTROLYTIC CAPACITOR 5X11MM
C3    100n     100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C4    47u       47UF 25V ELECTROLYTIC CAPACITOR 5X11MM
C5    100n     100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR

Transistors
Q1    2N5088     2N5088 GERENAL PURPOSE TRANSISTOR

Diodes
D1    1N914        1N914 SMALL SIGNAL DIODE 200MA 100V
D2    1N914        1N914 SMALL SIGNAL DIODE 200MA 100V
D3    BAT46        BAT46 SCHOTTKY BARRIER DIODE
D4    BAT46        BAT46 SCHOTTKY BARRIER DIODE
D5    BAT46        BAT46 SCHOTTKY BARRIER DIODE
D6    Not placed

Switches
S1    Footswitch
S2    SPDT ON/OFF/ON        MINI TOGGLE SWITCH ON-OFF-ON

Potentiometers
VOL      100k-B    100K OHM LINEAR TAPER POTENTIOMETER
GAIN    1k-B        1K OHM LINEAR TAPER POTENTIOMETER

PCB (LINK)

PCB SCHEMATIC

MODIFICATIONS

Change the diodes to have different types of distortion. The germanium diodes (1N60, 1N270, 1N34A...) will produce softer distortion, the silicon (1N914 , 1N4148...) harder and the leds more fuzz and crunch. You can also experiment with different combinations (symmetric o asymmetric). Use the diode sockets and easy change the diodes to find the sound you are looking for. This project already includes a diode selector, you can also use a rotatory selector to have more combinations.

GENERAL DESCRIPTION OF COMPONENTS

Resistors

Use a multimeter or the color bands to obtain the resistance value. 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

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

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.