2 layers55.2 × 39.7 mm
Buck
WidRojas/PCB-Hardware-Projects
Repo containing all PCB files alongside short project descriptions
37 parts
2 layers
Audio Matrix
WidRojas/PCB-Hardware-ProjectsRepo containing all PCB files alongside short project descriptions
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 2,519
- Nets
- 119
- Pads
- 5,129
- Tracks, vias
- 4,357, 2,395
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 26 May 2026
- Updated
- 2 Nov 2026
Overview
Audio Matrix is an open-source printed circuit board by WidRojas, from the WidRojas/PCB-Hardware-Projects repository on GitHub. It is a 2-layer board with 2,519 parts on 119 nets, routed with 4,357 tracks and 2,395 vias.
It is built around the STM32C071RBT6, AMS1117-3.3 and TYPE-C-31-M-12. Its parts include 2,451 diodes, 55 resistors, 7 capacitors, 2 ICs and 2 connectors. It belongs with the audio and music and lEDs and displays boards and the STM32 boards of this library.
Main components
3
STM32C071RBT6
LQFP-64(10x10)-40℃~+105℃、-40℃~+125℃、-40℃~+85℃ 128KB 12bit 24KB 2V~3.6V 32 Bit 48MHz 61 ARM Cortex-M0+ Built-in+External FLASH Power-on reset (POR)、Power-down reset (PDR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、Software reset、External pin reset (NRST)、Integrated LDO、Independent watchdog (IWDG)、Window watchdog (WWDG) LQFP-64(10x10) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
TYPE-C-31-M-12
SMD-30℃~+80℃ 1 10,000 cycles 16P 20V 5A 7.35mm Female Surface Mount, Right Angle Type-C SMD USB Connectors ROHSHRO ElectronicsUSB Connectors
README
README.mdVariable Buck Converter(WIP)
This project involved creating a buck converter which could regulate a 10V power supply to voltage suitable for a breadboard. simulations were done in LTspice and KiCad was used for creating schematics and PCB Layout.
PCB Revision #1
Currently awaiting second revision, due to high currents causing gate driver IC to fry
LED Matrix
This project involved the creation of a LED matrix to be used in conjunction with audio visualizer software, LED's are charlieplexed, STM32C071RBT6 was selected due to relatively low cost.
Parts
2,519| Qty | Value | Footprint | References |
|---|---|---|---|
| 2451 | LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1, D10, D100, D101, D1000, D1001, D1002, D1003, D1004, D1005, D1006, D1007, D1008, D1009, D1010, D1011 +2435 |
| 50 | 75 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R56, R57, R58, R59, R60, R61, R62, R63, R64, R65, R100, R101, R102, R103, R104, R105 +34 |
| 3 | 100n | Capacitor_SMD:C_0201_0603Metric_Pad0.64x0.40mm_HandSolder | C2, C5, C6 |
| 2 | 10p | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C7 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C4 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7, R8 |
| 1 | 0 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 16MHz | Audio_matrix_imports:CHIP_X32B4SI_SYX | Y1 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | Conn_01x04_Pin | Audio_matrix_imports:CONN_PZ254V-11-04P_XFC | J1 |
| 1 | STM32C071RBT6 | Audio_matrix_imports:QFP50P1200X1200X160-64N | IC1 |
| 1 | SW_SPDT_321 | Audio_matrix_imports:1P2T_SS-12D00_CNK | SW1 |
| 1 | TYPE-C-31-M-12 | Audio_matrix_imports:CONN12_C-31-M-12_HRO | J3 |
Questions
What parts does the Audio Matrix use?
2,519 parts, built around the STM32C071RBT6, AMS1117-3.3 and TYPE-C-31-M-12. 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 Audio Matrix KiCad files?
From the WidRojas/PCB-Hardware-Projects repository on GitHub, at the commit this page was made from: the board is Audio_Matrix/Audio_Matrix.kicad_pcb and its schematic Audio_Matrix/Audio_Matrix.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Audio Matrix design in my own project?
Its repository states no licence, so its author keeps all rights: ask WidRojas before reusing the design.
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