2 layers70 × 70 mm
2 layers49.7 × 31.7 mm
CommBadge
romanvrable/openmic2Open, as in open source, audio processing code and PCBs
- Size
- 49.7 × 31.7 mm
- Copper layers
- 2
- Thickness
- 1.2 mm
- Parts
- 47
- Nets
- 60
- Pads
- 254
- Tracks, vias
- 485, 66
- Pours
- 13
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241129)
- Created
- 12 Nov 2025
- Updated
- 12 Nov 2025
Overview
CommBadge is an open-source printed circuit board by romanvrable, from the romanvrable/openmic repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 49.7 × 31.7 mm with 47 parts on 60 nets, routed with 485 tracks and 66 vias.
It is built around the ESP32-S3-MINI-1-N4R2, MAX98357AEWL+T and ICS-43434, with the ME6211C33M5G-N, TP4054 and XL-1010RGBC-2812B among its other parts. Its parts include 18 capacitors, 9 diodes, 7 resistors, 6 ICs and 4 connectors. It belongs with the ESP32 boards of this library.
Main components
12
ESP32-S3-MINI-1-N4R2
SMD-103.5dBm -40℃~+85℃ 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 On-board PCB Antenna UART、SPI、I2C、GPIO、I2S、USB SMD WiFi Modules ROHSEspressif SystemsWiFi Modules
MAX98357AEWL+T
BGA-9(1.3x1.3)-40℃~+85℃ 0.015% 1-Channel、2-Channel 2.5V~5.5V 3.2W×1@4Ω、1.8W×1@8Ω、0.93W×1@8Ω 3.35mA 77dB 92% Automatic mute/no-noise switch、Enable/shutdown function、Filterless architecture、Analog voltage gain、Automatic power-saving mode Class D BGA-9(1.3x1.3) Audio Amplifiers ROHSMaxim Integrated (Analog Devices)Audio Amplifiers
ICS-43434
LGA-6(3.5x2.7)-26dB -40℃~+85℃ 0.98mm 1.65V~3.63V 2.65mm 3.5mm 550uA 64dB I2S Omnidirectional Omnidirectional pickup LGA-6(3.5x2.7) MEMS Microphones ROHSTDK InvenSenseMEMS Microphones
ME6211C33M5G-N
SOT-23-5-40℃~+150℃ 1 120mV@(100mA) 3.3V 500mA 50uVrms 60uA 6V 70dB@(1kHz) Fixed Over Current Protection、Enable、Short Circuit Protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMICRONEVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsTP4054
SOT-23-5L-40℃~+85℃ 1 25uA 4.2V 4.2V~6.5V 500mA Charging IC Lithium Battery Not supported 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 SOT-23-5L Battery Management ROHSUMWBattery Management
XL-1010RGBC-2812B
SMD,1x1mm-20℃~+85℃ 0.35mA 0.8mm 120° 1kHz 1mm 1mm 2000V 200mcd、800mcd、300mcd 4.5V~5.5V 800Kbit/s B:465nm~475nm、R:620nm~625nm、G:520nm~530nm G:525nm、R:625nm、B:470nm Top-mount Water Clear SMD,1x1mm RGB LEDs(Built-in IC) ROHSXINGLIGHTRGB LEDs(Built-In IC)
CL05A106MQ5NUN
040210uF 6.3V X5R ±20% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
ES05D1MC10
DFN1006-2L-55℃~+125℃ 11V 200nA 22pF 5.6V 5V 80W 8A Bidirectional ESD IEC 61000-4-2 DFN1006-2L ESD and Surge Protection (TVS/ESD) ROHSGOODWORKESD And Surge Protection (TVS/ESD)
GRM21BR60J107ME15
0805100uF 6.3V X5R ±20% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSMurataMultilayer Ceramic Capacitors MLCC - SMD/SMT
GRM188R6YA106MA73
060310uF 35V X5R ±20% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSMurataMultilayer Ceramic Capacitors MLCC - SMD/SMT
CA45-B6R3K227T
CASE-B-3528-19(mm)-55℃~+125℃ 1.2Ω@100kHz 220uF 6.3V ±10% CASE-B-3528-19(mm) Tantalum Capacitors ROHSHunan Xiangyee in S&TTantalum Capacitors
532610271
SMD,P=1.25mm,卧贴-40℃~+105℃ 1 1.25mm 125V 1A 1x2P 2 2P 3.4mm 5.2mm 7.65mm Auxiliary Solder Pin Glass fiber reinforced PA Phosphor bronze PicoBlade(MX 1.25) Surface Mount, Right Angle Tin UL94V-0 White SMD,P=1.25mm,卧贴 Wire To Board Connector ROHSMolexWire To Board Connector
README
PCB/Intercom/README.mdIntercom
These files are for use in KiCad.
Trademark
This is an open source project, but bear in mind you cannot sell boards bearing the Andrews & Arnold Ltd name, the A&A logo, the registered trademark AJK logo, or the GS1 allocated EANs assigned to Andrews & Arnold Ltd.
Images
Auto generated 2025-08-10T15:43:51
Parts
47| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 100nF | RevK:C_0402 | C2, C6, C10, C11, C12, C14, C15, C16, C17, C18 |
| 6 | XL-1010RGBC-WS2812B | RevK:SMD1010 | D4, D5, D6, D7, D8, D9 |
| 4 | 10K | RevK:R_0402 | R1, R2, R3, R4 |
| 3 | 10uF | RevK:C_0402 | C7, C8, C13 |
| 2 | 5K1 | RevK:R_0402 | R5, R6 |
| 2 | ~ | RevK:DFN1006-2L | D1, D3 |
| 1 | 100uF | RevK:C_0805 | C4 |
| 1 | 10uF 35V | RevK:C_0603 | C5 |
| 1 | 1uF | RevK:C_0402 | C9 |
| 1 | 220uF Tant | RevK:CP_EIA-3528-21_Kemet-B | C1 |
| 1 | 22uF | RevK:C_0603 | C3 |
| 1 | 634K | RevK:R_0402 | R8 |
| 1 | Battery | RevK:1.25T-2PWT (Molex 532610271) | J2 |
| 1 | CJ2301 | RevK:SOT-23 | Q1 |
| 1 | ESP32-S3-MINI-1 | RevK:ESP32-S3-MINI-1 | U6 |
| 1 | L | RevK:ICS43434_MEMS_Mic_Open | U5 |
| 1 | MAX98357A | RevK:WLP-1.437mmx1.347mm-0.21mm-ball | U2 |
| 1 | MBR0530 | RevK:D_SOD-123 | D2 |
| 1 | ME6211C33M5G-N | RevK:SOT-23-5 | U4 |
| 1 | R | RevK:ICS43434_MEMS_Mic_Open | U7 |
| 1 | Reset | RevK:AA-Pad | J1 |
| 1 | SW_Push | RevK:TS-1092S-B3D2-G | SW2 |
| 1 | Speaker | RevK:KLJ-Speaker | LS1 |
| 1 | TC2030-USB-NL-DS | RevK:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J3 |
| 1 | TP4054 | RevK:SOT-23-5 | U3 |
| 1 | USB-C-Socket-H | RevK:USB-C-Socket-H | J5 |
Questions
How big is the CommBadge PCB?
It measures 49.7 × 31.7 mm and has 2 copper layers, 1.2 mm thick.
What parts does the CommBadge use?
47 parts, built around the ESP32-S3-MINI-1-N4R2, MAX98357AEWL+T, ICS-43434 and ME6211C33M5G-N. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the CommBadge KiCad files?
From the romanvrable/openmic repository on GitHub, at the commit this page was made from: the board is PCB/CommBadge/CommBadge.kicad_pcb and its schematic PCB/CommBadge/CommBadge.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the CommBadge design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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