HardLabs

USB AudioInterface 2i2 Pico2

altura-dsp·USB_AudioInterface_2i2_Pico2·Hardware_PCB/4_Pico-Scarlett.net

This repository ships a schematic but no board layout.

About the USB AudioInterface 2i2 Pico2 PCB

USB AudioInterface 2i2 Pico2 is an open source RP2040/RP2350 PCB design by altura-dsp, published on GitHub under the GPL-3.0 license. It is a board, with 86 components from 44 distinct parts.

Its main chip is the Raspberry Pi Pico 2 (RP2350), from the RP2040/RP2350 family.

It belongs with the audio designs in this gallery.

From the project

Stereo USB audio interface (UAC2, 24-bit I2S, TinyUSB) for Raspberry Pi Pico 2 / RP2350.

Status: First public release · Target: Raspberry Pi Pico 2 (RP2350) · License: GPL-3.0

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Requires PlatformIO CLI (or the VS Code extension).

USB AudioInterface 2i2 Pico2 bill of materials (BOM)

86 components, 44 distinct parts.

QtyPartRefs
1
2N3904 NPN
2N3904
1
AP2112K 3.3V
AP2112K
2
10uF bipolar
C_adc_C3_10uF, C_adc_C3_10uF1
2
2.2nF C0G/NP0
C_aim_C_2n2, C_aim_C_2n2_1
2
1nF C0G/NP0
C_alias_C2_1nF, C_alias_C2_1nF1
1
TBD 1uF tipico
C_ap2112
2
47uF 63V bipolar
C_aphantom_47uF, C_aphantom_47uF1
2
47pF C0G
C_chassis_47pF, C_chassis_47pF1
2
TBD
C_codec_cpump_1, C_codec_cpump_2
2
10uF 16V electrolitico
C_dc_in_10uF, C_dc_in_10uF1
16
100nF X7R
C_dc_in_100nF, C_dc_in_100nF1, C_dec_ne_100nF, C_dec_ne_100nF1, C_dec_njm_100nF, C_dec_opa_100nF, C_dec_opa_100nF1, C_dec_pico_100nF +8
2
10uF tantalum
C_lm317_10uF, C_lm337_10uF
2
TBD segun DS
C_lt1054_out, C_lt1054_pump
1
10uF
C_vcc_codec_10uF
2
1uF
C_vcom_1uF, C_vref_1uF
1
1N4148
D_flyback_1N4148
3
600R@100MHz ferrita
FB_chassis_600R, FB_chassis_600R1, FB_pi_600R
1
G5V-2 (DPDT NC)
G5V-2
1
LM317
LM317
1
LM337
LM337
Show 24 more
QtyPartRefs
1
LT1054
LT1054
1
4.7uH
L_pi_4u7
1
MT3608
MT3608
2
Neutrik NCJ6FI-S combo XLR+TRS
NCJ6FI-S, NCJ6FI-S1
2
NE5532
NE5532, NE5532_1
1
NJM4556A
NJM4556A
2
OPA1612
OPA1612, OPA1612_1
1
PCM3060
PCM3060
1
PTC 500mA resettable
PTC_500mA
1
Raspberry Pi Pico 2 (RP2350)
RP2350
2
3.3k 1%
R_aim_R_3k3, R_aim_R_3k3_1
2
100R
R_aphantom_100R, R_aphantom_100R1
1
6.81k 0.1%
R_gain_that1
1
110k 1%
R_mt_R1_110k
1
7.5k 1%
R_mt_R2_7k5
1
1k
R_mute_base_1k
4
10k 1%
R_ne_rf_10k, R_ne_rf_10k1, R_ne_rin_10k, R_ne_rin_10k1
2
15k 1%
R_thn_R1_15k, R_thn_R1_15k1
2
4.7k 1%
R_thn_R2_4k7, R_thn_R2_4k7_1
1
Switchcraft TRS balanceado
Switchcraft_TRS_out1
2
THAT1510
THAT1510, THAT1510_1
4
P6KE12CA
TVS_out_P6KE12CA, TVS_out_P6KE12CA1, TVS_xlr_P6KE12CA, TVS_xlr_P6KE12CA1
2
CDSOD323-T05LC
TVS_ts_CDSOD323, TVS_ts_CDSOD323_1
1
USBLC6-2SC6
USBLC6-2SC6

USB AudioInterface 2i2 Pico2 design files

The KiCad project lives in the altura-dsp/USB_AudioInterface_2i2_Pico2 repository on GitHub; these links point at the commit this page was built from.

USB AudioInterface 2i2 Pico2: common questions

What microcontroller does the USB AudioInterface 2i2 Pico2 use?

The USB AudioInterface 2i2 Pico2 is built around the Raspberry Pi Pico 2 (RP2350), from the RP2040/RP2350 family.

How many components are on the USB AudioInterface 2i2 Pico2?

86 components, from 44 distinct parts. The full bill of materials is listed on this page.

Where can I download the USB AudioInterface 2i2 Pico2 design files?

From the altura-dsp/USB_AudioInterface_2i2_Pico2 repository on GitHub, which has a netlist; the links under Design files point to each one.

Can I use the USB AudioInterface 2i2 Pico2 design in my own project?

Yes, under the terms of its GPL-3.0 license, which altura-dsp chose for the repository.

Can I test firmware for the USB AudioInterface 2i2 Pico2 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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