HardLabs

Audiotest

aherbez·audiotest

Audiotest PCB layout, top view — open source RP2040/RP2350 board by aherbez

About the Audiotest PCB

Audiotest is an open source RP2040/RP2350 PCB design by aherbez, published on GitHub. It is a 4-layer board measuring 58 × 104 mm, with 79 components from 42 distinct parts.

Its main chip is the ESP32-PICO-D4, from the RP2040/RP2350 family. Other key parts include the MCP73831T-2ACI_MC, TPS78218DRVR, FT231XQ-R, BQ27441DRZT-G1A and TCA6416ARTWR. By type, the board carries 26 resistors, 24 capacitors, 10 ICs, 9 switches, 4 transistors and 3 connectors.

It belongs with the audio designs in this gallery.

Main components on the Audiotest

ESP32-PICO-D4MCP73831T-2ACI_MCTPS78218DRVRFT231XQ-RBQ27441DRZT-G1ATCA6416ARTWRMAX98357AEWL+TTXS0108ERGYRER-TFT023-1TLV75733PDRVR

Audiotest bill of materials (BOM)

79 components, 42 distinct parts.

QtyPartRefs
1
ESP32-PICO-D4
U1
1
MCP73831T-2ACI_MC
U2
1
TPS78218DRVR
U3
1
FT231XQ-R
U4
1
BQ27441DRZT-G1A
U5
1
TCA6416ARTWR
U6
1
MAX98357AEWL+T
U7
1
TXS0108ERGYR
U8
1
ER-TFT023-1
U9
1
TLV75733PDRVR
U10
2
DMP1045UFY4
Q1, Q4
2
MMSS8050-H-TP
Q2, Q3
1
12401610E4#2A
J1
2
Conn_01x02
J2, J3
1
PRO-OB-440
E1
8
SW_SPST
SW1, SW2, SW3, SW4, SW5, SW6, SW7, SW8
1
SW_SPST
SW9
1
‎BAT20JFILM
D1
1
1.6nH±0.3nH
L1
2
0.1uF/25V(10%)
C1, C5
Show 22 more
QtyPartRefs
1
4.7pF/25V(±0.5pF)
C2
1
2.7pF/25V(±0.5pF)
C3
1
10uF/6.3V(10%)
C4
2
4.7uF
C6, C7
5
1uF
C8, C9, C13, C19, C20
2
12pF
C10, C11
1
100nF
C12
1
0.47uF
C14
1
10uF
C15
5
0.1uF
C16, C17, C18, C21, C22
1
10uF
C23
1
0.1uF
C24
1
10k(1%)
R1
1
100K(5%)
R2
1
2K(5%)
R3
2
5.1K(10%)
R4, R5
2
27
R6, R7
1
0.01
R8
5
10k
R9, R10, R23, R24, R25
4
330
R11, R12, R13, R14
8
100k
R15, R16, R17, R18, R19, R20, R21, R22
1
150
R26

Audiotest design files

The KiCad project lives in the aherbez/audiotest repository on GitHub; these links point at the commit this page was built from.

Audiotest: common questions

What microcontroller does the Audiotest use?

The Audiotest is built around the ESP32-PICO-D4, from the RP2040/RP2350 family.

How big is the Audiotest PCB?

The Audiotest measures 58 × 104 mm, has 4 copper layers and is 1.2 mm thick.

How many components are on the Audiotest?

79 components, from 42 distinct parts. The full bill of materials is listed on this page.

Where can I download the Audiotest design files?

From the aherbez/audiotest repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Audiotest design in my own project?

The repository has no license, so all rights stay with aherbez. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Audiotest 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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