PCB for 1590BB enclosure

This PCB simplifies building your DIY guitar pedal in a 1590BB enclosure. With the LED, jacks, and footswitch mounted directly to the board, you only need to wire the battery and the effect PCB.
Steps
  1. Overview
  2. Designators and components
  3. Enclosure
  4. PCB assembly
  5. Wiring
Categories
DIY Projects, DIY Guitar Effects
Created by DHEA
Status: Active
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Designators and components Step 2 of 5

COMPONENT LIST

PCB                    1590BB DIY PCB GUITAR EFFECT
C1     100u          100UF 35V 105C RADIAL ELECTROLYTIC CAPACITOR 6X11MM
C2     100n          100NF 0.1UF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
D1     Jumper      (Optional 1N4001 DIODE 1A 50V)
D2     1N4001      1N4001 DIODE 1A 50V
R1     3.3k           3.3K OHM 1/4W 1% METAL FILM RESISTOR (For LED3, Optional)
R2     Jumper      (Optional 47 OHM 1/4W 1% METAL FILM RESISTOR)
R3     3.3k           3.3K OHM 1/4W 1% METAL FILM RESISTOR
LED1  Led           LED 3MM GREEN
LED2  Led           LED 3MM GREEN (Optional)
LED3  Led           LED 3MM GREEN (Optional)
DC                     DC POWER JACK 2.1MM BARREL-TYPE PCB MOUNT
JACK IN              6.35MM 1/4" STEREO INSULATED SWITCHED SOCKET JACK PCB
JACK OUT           6.35MM 1/4" STEREO INSULATED SWITCHED SOCKET JACK PCB
3PDT                  3PDT STOMP FOOT / PEDAL SWITCH
BATTERY             9V 9-VOLT BATTERY CLIP / CONNECTOR SNAP
CONNECTOR       XH 4-PIN MALE CONNECTOR (Optional)
WIRES                XH 4-pin female connector with wires (Optional)

 

PCB

 

SCHEMATIC

 

CIRCUIT DESCRIPTION

Diodes LED

This PCB has two positions for the effect status LED. You only need to use LED1 or LED2. R3 serves as the current-limiting resistor for both LEDs. Select the resistance value to achieve your desired brightness. A range of 2.2kΩ to 4.7kΩ is recommended for standard LEDs.

LED3 is an optional power indicator that lights up whenever the circuit is connected to a power supply. You can mount it on the side of the enclosure. If you choose not to use it, you don't need to install R1.

Noise filter

Capacitors C1 and C2, paired with R2, filter noise from the power supply. To bypass this filter, omit C1 and C2 and replace R2 with a jumper.

R2 will drop the voltage reaching the effect PCB. Replacing R2 with a jumper will maintain the full power supply voltage, but with a less effitive noise filtering.

Reverse polarity protection

Diodes D1 and D2 provide reverse polarity protection. You can use D1 (for series protection) or D2 (for parallel protection), or both simultaneously.

  • Series Protection (D1): Provides reliable protection by blocking current flow, but with a voltage drop (approximately 0.6V for the 1N4001 diode).
  • Parallel Protection (D2): Has no voltage drop under normal operation. However, if the polarity is reversed, the diode can be damaged, potentially leading to component failure and requiring replacement.

If your effect PCB already has reverse polarity protection, you can omit D2 and replace D1 with a jumper.

 

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