EA Tremolo

This is the EA Tremolo, classic and simple DIY guitar effect project. This pedal varies the volume automatically over the time with speed and intensity controls. It also includes an LED indicator to flash in time with the effect speed.
Steps

Created by DHEA
Status: Active
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Designators and components Step 2 of 6

COMPONENT LIST 

PCB
1 x  EA Tremolo PCB
Capacitors        
C1    47n       47NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2    10u       10UF 50V ELECTROLYTIC CAPACITOR 5X11MM
C3    220n     220NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C4    47p       47PF 50V CERAMIC DISC CAPACITOR
C5    22u       22UF 50V ELECTROLYTIC CAPACITOR 5X11MM
C6    470n     470NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C7    470n     470NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C8    1u         1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C9    1u         1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C10  1u         1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR

Diodes        
D1    LED            LED 3MM GREEN  

Transistors
Q1    2N5457     2N5457 JFET N-CHANNEL TRANSISTOR
Q2    2N3904     2N3904 NPN GENERAL PURPOSE TRANSISTOR
Q3    2N5457     2N5457 JFET N-CHANNEL TRANSISTOR
Q4    2N5088     2N5088 GERENAL PURPOSE TRANSISTOR
(SMD Q1 and Q3:  SMD SOT-23 2N5457 JFET N-CHANNEL TRANSISTOR and SMD TRANSISTOR PCB)

Resistors
R1     1M        1M OHM 1/4W 1% METAL FILM RESISTOR
R2     1M        1M OHM 1/4W 1% METAL FILM RESISTOR
R3     1M        1M OHM 1/4W 1% METAL FILM RESISTOR
R4     10k       10K OHM 1/4W 1% METAL FILM RESISTOR
R5     560k     560K OHM 1/4W 1% METAL FILM RESISTOR
R6     150k     150K OHM 1/4W 1% METAL FILM RESISTOR
R7     1.2k      1.2K OHM 1/4W 1% METAL FILM RESISTOR
R8     180       180 OHM 1/4W 1% METAL FILM RESISTOR
R9     4.7k      4.7K OHM 1/4W 1% METAL FILM RESISTOR
R10   120k     120K OHM 1/4W 1% METAL FILM RESISTOR
R11   10k       10K OHM 1/4W 1% METAL FILM RESISTOR
R12   2.2M     2.2M OHM 1/4W 1% METAL FILM RESISTOR
R13   15k       15K OHM 1/4W 1% METAL FILM RESISTOR
R14   1k         1K OHM 1/4W 1% METAL FILM RESISTOR
R15   68k       68K OHM 1/4W 1% METAL FILM RESISTOR

Potentiometers        
DEPTH      250k-B       250k OHM LINEAR TAPER POTENTIOMETER
SPEED      100k-B       100k OHM LINEAR TAPER POTENTIOMETER
VOL          50k            50K TRIMMER POTENTIOMETER

PCB Schematic


PCB

     

 

MODIFICATIONS

Resistors
R10   560k     560K OHM 1/4W 1% METAL FILM RESISTOR
R14   2.2k      2.2K OHM 1/4W 1% METAL FILM RESISTOR
R15   Jumper

Potentiometers        
DEPTH      1M-B       1M OHM LINEAR TAPER POTENTIOMETER
SPEED      25k-A       25K OHM LOGARITHMIC TAPER POTENTIOMETER