RP2040 DSP Modular
About the RP2040 DSP Modular PCB
RP2040 DSP Modular is an open source RP2040/RP2350 PCB design by DMME-NL, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 166.2 × 92.6 mm, with 100 components from 46 distinct parts.
Its main chip is the RP2040-Zero, from the RP2040/RP2350 family. Other key parts include the LM78M05CDT/NOPB, CD4051BPWR, APS6404L-3SQR-SN, PCA9555DB and PCM1808. By type, the board carries 33 capacitors, 17 resistors, 13 connectors, 12 ICs, 8 diodes and 2 switches.
It belongs with the audio and displays & leds designs in this gallery.
From the project
Guitar stereo multi-effects using RP2040
RP2040-DSP is a fully modular 24-bit stereo audio effects processor built on the Raspberry Pi RP2040 microcontroller. It is designed to run real-time audio effects for guitar and other instruments, including cabinet simulation for headphone or direct recording use.
The firmware architecture is modular, supporting multiple effects that can be stacked and configured flexibly.
Main components on the RP2040 DSP Modular
RP2040 DSP Modular bill of materials (BOM)
100 components, 46 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM78M05CDT/NOPB LM78M05_TO252 Texas Instruments | TO-252-2 | U1 |
| 1 | CD4051BPWR 4051 Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U3 |
| 1 | RP2040-Zero | RP2040 Zero Header | U4 |
| 1 | APS6404L-3SQR-SN APS6404L-3SQRx-SN AP Memory | SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | PCA9555DB Texas Instruments | SSOP-24_5.3x8.2mm_P0.65mm | U6 |
| 1 | PCM1808 | PCM1808_ADC_MODULE | U7 |
| 1 | PCM5102 | PCM5102_DAC_MODULE | U8 |
| 2 | NE5532DR NE5532 Texas Instruments | SOIC-8_3.9x4.9mm_P1.27mm | U9, U10 |
| 1 | 4N36 | DIP-6_W7.62mm | U11 |
| 1 | ~ | 128x64OLED | U12 |
| 1 | AMS1117CD-3.3 Advanced Monolithic Systems | TO-252-3_TabPin2 | U13 |
| 1 | DC | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | EXP1 | Jack 6.35mm Horizontal | J2 |
| 1 | EXP_2 | Jack 6.35mm Horizontal | J3 |
| 1 | Daughter | IDC-Header_2x08_P2.54mm_Vertical | J4 |
| 1 | SW1 | PinHeader_1x02_P2.54mm_Vertical | J5 |
| 1 | SW2 | PinHeader_1x02_P2.54mm_Vertical | J6 |
| 1 | SW3 | PinHeader_1x02_P2.54mm_Vertical | J7 |
| 1 | SW4 | PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | INPUT | Jack 6.35mm Horizontal | J9 |
Show 26 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MIDI OUT | Jack 6.35mm Horizontal | J10 |
| 1 | MIDI IN | Jack 6.35mm Horizontal | J11 |
| 1 | OUTPUT | Jack 6.35mm Horizontal | J12 |
| 1 | Main | IDC-Header_2x08_P2.54mm_Vertical | J13 |
| 7 | 10kB | Potentiometer_Alpha_RD901F-40-00D | RV1, RV2, RV3, RV4, RV5, RV6, RV7 |
| 1 | 10k | Potentiometer_Alpha_RD902F-40-00D | RV8 |
| 4 | RC0805FR-071ML 1M YAEGO | R_0805_2012Metric | Rb1, Rb2, Rb3, Rb4 |
| 2 | RC0805FR-074K7L 4k7 YAEGO | R_0805_2012Metric | Rg1, Rg2 |
| 1 | RC0805FR-0710KL 10k YAEGO | R_0805_2012Metric | Rp1 |
| 1 | Encoder | RotaryEncoder_Alps_EC11 | SW1 |
| 1 | ADDR | SW_DIP_SPSTx04_Slide_9.78x12.34mm_W7.62mm_P2.54mm | SW2 |
| 1 | SD0805S040S0R5 D KYOCERA AVX | D_0805_2012Metric | D1 |
| 2 | APT2012SRCPRV LED Kingbright | D_0805_2012Metric | D2, D3 |
| 5 | LED | LED_D5.0mm | D4, D5, D6, D7, D8 |
| 1 | 865080343009 100u Würth Elektronik | C_Elec_6.3x5.8 | C1 |
| 18 | GCM21BR71H104KA37K 100n Murata Electronics | C_0805_2012Metric | C2, C3, C4, C5, C6, C10, C11, C12 +10 |
| 10 | 865080440002 10u Würth Elektronik | C_Elec_4x5.4 | C7, C8, C14, C15, C22, C23, C26, C27 +2 |
| 2 | GRM216R61E105KA12D 1u Murata Electronics | C_0805_2012Metric | C9, C30 |
| 2 | GRM2165C1H101JA01J 100p Murata Electronics | C_0805_2012Metric | C16, C17 |
| 9 | RC0805FR-071KL 1k YAEGO | R_0805_2012Metric | R1, R2, R3, R4, R7, R8, R9, R10 +1 |
| 2 | RC0805FR-0710KL 10k YAEGO | R_0805_2012Metric | R5, R6 |
| 2 | RC0805FR-074K7L 4k7 YAEGO | R_0805_2012Metric | R11, R12 |
| 1 | RC0805FR-07680RL 680 YAEGO | R_0805_2012Metric | R15 |
| 1 | RC0805FR-0710RL 10 YAEGO | R_0805_2012Metric | R16 |
| 1 | RC0805FR-0733RL 33 YAEGO | R_0805_2012Metric | R17 |
| 1 | RC0805FR-07220RL 220 YAEGO | R_0805_2012Metric | R18 |
RP2040 DSP Modular design files
The KiCad project lives in the DMME-NL/RP2040-DSP-Public repository on GitHub; these links point at the commit this page was built from.
RP2040 DSP Modular: common questions
What microcontroller does the RP2040 DSP Modular use?
The RP2040 DSP Modular is built around the RP2040-Zero, from the RP2040/RP2350 family.
How big is the RP2040 DSP Modular PCB?
The RP2040 DSP Modular measures 166.2 × 92.6 mm, has 2 copper layers and is 1.2 mm thick.
How many components are on the RP2040 DSP Modular?
100 components, from 46 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the RP2040 DSP Modular design files?
From the DMME-NL/RP2040-DSP-Public repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the RP2040 DSP Modular design in my own project?
Yes, under the terms of its GPL-3.0 license, which DMME-NL chose for the repository.
Can I test firmware for the RP2040 DSP Modular without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.
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