HardLabs

Moto Audio

bacnbit·Moto_Audio·hardware/kicad/moto_audio_unit_rev2.kicad_sch

This repository ships a schematic but no board layout.
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About the Moto Audio PCB

Moto Audio is an open source ESP32 PCB design by bacnbit, published on GitHub. It is a board, with 40 components from 30 distinct parts.

Its main chip is the ESP32-S3-WROOM-1-N8, from the ESP32 family. Other key parts include the BM62SPKS1MC2, PCM5102APWR, TPA6132A2DCKR, IP5306 and TPS2116DRLR. By type, the board carries 11 resistors, 9 ICs, 9 capacitors, 7 connectors, 1 switch and 1 diode.

It belongs with the audio designs in this gallery.

From the project

Open in KiCad 8 or 9 (free at kicad.org).

Open in KiCad 8 or 9 (free at kicad.org).

- motoaudiounitrev2.kicadsch — Current schematic (Rev 2.0) - motoaudiounitrev1.kicadsch — Previous schematic (Rev 1.0, archived)

1. Open KiCad → Open Existing Project → select the .kicad_sch file 2. All symbols are embedded in the file (no external lib needed) 3. Run Tools → Update Schematic from Library to resolve standard footprints 4. For BM62 footprint: install Microchip KiCad library via Plugin Manager

Main components on the Moto Audio

ESP32-S3-WROOM-1-N8BM62SPKS1MC2PCM5102APWRTPA6132A2DCKRIP5306TPS2116DRLRAMS1117-3.3MCP73831T-2ACI/OT

Moto Audio bill of materials (BOM)

40 components, 30 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
ESP32-S3-WROOM-1-N8
U1
1
BM62SPKS1MC2
BM62 — BT Radio #2 (Radio HFP)
U2
1
BM62SPKS1MC2
BM62 — BT Radio #3 (Expansion)
U3
1
PCM5102APWR
PCM5102A 112dB DAC
U4
1
TPA6132A2DCKR
TPA6132A2 HP Amp
U5
1
IP5306
IP5306 5V Boost
U6
1
TPS2116DRLR
TPS2116 Hot-swap Mux
U7
1
AMS1117-3.3
U8
1
MCP73831T-2ACI/OT
MCP73831 100mA charger
U9
1
U262-16XN-4BVC11
USB-C Charge+Flash
J1
1
n/a
Helmet 5-pin Pogo Mag
J2
1
C456220
3.5mm TRRS Radio Jack
J3
1
n/a
4-pin Pogo Battery
J4
1
S2B-PH-K-S
JST-PH2 400mAh Keep-alive
J5
1
SM02B-GHS-TB
JST-GH2 Mic Pigtail
J6
1
C145890
2.5mm Ext PTT
J7
1
SPM0687LR5H-1
MIC1
1
EC11E15244B1
EC11 Vol+Mute (socketed)
SW1
1
WS2812B-2020
WS2812B-2020 Status
D1
1
BLM18PG221SN1D
BLM18PG221SN1
FB1
Show 10 more
QtyPartRefs
4
GRM155R61A106ME11
10uF 0402
C1, C3, C6, C8
4
GRM155R71C104KA88
100nF 0402
C2, C4, C7, C9
1
GRM155R60J105KE19
1uF 0402
C5
1
RC0402FR-0710KL
10k PROG
R1
5
RC0402FR-0710KL
10k
R2, R3, R4, R5, R10
1
RC0402FR-07100RL
100R
R6
1
RC0402FR-075K1L
5.1k CC1
R7
1
RC0402FR-075K1L
5.1k CC2
R8
1
RC0402FR-0710KL
10k NTC pu
R9
1
RC0402FR-070RL
GND (IN1 prio)
R11

Moto Audio design files

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

Moto Audio: common questions

What microcontroller does the Moto Audio use?

The Moto Audio is built around the ESP32-S3-WROOM-1-N8, from the ESP32 family.

How many components are on the Moto Audio?

40 components, from 30 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 Moto Audio design files?

From the bacnbit/Moto_Audio repository on GitHub, which has the schematic and the BOM; the links under Design files point to each one.

Can I use the Moto Audio design in my own project?

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

Can I test firmware for the Moto Audio without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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