OD-1 Overdrive

The OD-1 is a legendary overdrive pedal. With only two knobs (gain and volume) creates warm and vintage overdrive tones.

Steps

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COMPONENT LIST

PCB
1 x  https://www.taydaelectronics.com/od-1-overdrive-diy-pcb-guitar-effect.html
Capacitors
C1   100n     100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2   47n      47NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C3   47n      47NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C4   47p 47PF 50V CERAMIC DISC CAPACITOR
C5   18n      18NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C6   1u 1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C7   100n     100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C8   1u 1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C9   47u 47UF 50V ELECTROLYTIC CAPACITOR 6X11MM
C10 100u 100UF 35V ELECTROLYTIC CAPACITOR 6X11MM

Diodes
D1   1N4148   1N4148 SWITCHING SIGNAL DIODE
D2   1N4148   1N4148 SWITCHING SIGNAL DIODE
D3   1N4148   1N4148 SWITCHING SIGNAL DIODE
D4   1N4001   1N4001 DIODE 1A 50V

IC
U1 TL074 TL074 OPERATIONAL AMPLIFIER
(U1 Socket 14 PIN DIP IC SOCKET ADAPTOR)

Potentiometers
VOLUME 10k-B 10K OHM LINEAR TAPER POTENTIOMETER
GAIN 1M-A 1M OHM LOGARITHMIC TAPER POTENTIOMETER

PCB Schematic

PCB

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.

Integrated Circuits

Integrated Circuits (ICs) have their model printed on them. A notch half-circle or a dot indicates the correct position of the IC on the PCB.

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.

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OD-1 Overdrive

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