4 layers76.5 × 76.9 mm
4 layers76 × 76.9 mm
Dsp amplifier x4
blus-audio/hardware1Audio hardware
- Size
- 76 × 76.9 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 179
- Nets
- 221
- Pads
- 736
- Tracks, vias
- 1,100, 412
- Pours
- 76
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 2 Apr 2021
- Updated
- 15 Jun 2026
Overview
Dsp amplifier x4 is an open-source printed circuit board by blus-audio, from the blus-audio/hardware repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 4-layer board of 76 × 76.9 mm with 179 parts on 221 nets, routed with 1,100 tracks and 412 vias.
It is built around the STM32F401RCT6, 74AVC9112DCH and 25LC512-I/P, with the AMS1117-1.8, AMS1117-3.3 and TPS54302 among its other parts. Its parts include 97 capacitors, 45 resistors, 13 ICs, 11 connectors and 2 switches. It belongs with the audio and music boards and the STM32 boards of this library.
Main components
12
STM32F401RCT6
LQFP-64(10x10)-40℃~+85℃ 1.7V~3.6V 12bit 256KB 32 Bit 50 64KB 84MHz ARM Cortex-M4 Built-in FLASH LQFP-64(10x10) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
74AVC9112DCH
VSSOP-8-0.5mm-40℃~+125℃ 1 4 800mV~3.6V VSSOP-8-0.5mm Clock Buffers, Drivers, Distributors ROHSNexperiaClock Buffers, Drivers, Distributors
25LC512-I/P
PDIP-8-40℃~+85℃ 1,000,000 cycles 2.5V~5.5V 200 Years 20MHz 512Kbit 5ms Hardware write protection function、Built-in power-on reset (POR)、Built-in write enable latch (WEL)、Power-down/Power-up protection circuit SPI PDIP-8 EEPROM ROHSMicrochip TechnologyEEPROM
AMS1117-1.8
SOT-223-40℃~+125℃@(Tj) 0.003%Vout 1 1.3V@(1A) 1.8V 15V 1A 72dB@(120Hz) Fixed Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsAMS1117-3.3
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
TPS54302
UncategorisedTexas InstrumentsUSBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
CL05B104KB54PNC
0402100nF 50V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
CL31A106KBHNNNE
120610uF 50V X5R ±10% 1206 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
0402WGF330J
0402-55℃~+155℃ 33Ω 50V 62.5mW Thick Film Resistor ±1% ±100ppm/℃ 0402 Chip Resistor - Surface Mount ROHSUNI-ROYALChip Resistor - Surface MountCL05B103KB5NNN
040210nF 50V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
CL10A105KB8NNN
06031uF 50V X5R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
README
blus-mini/kicad/README.mdHardware design files
Parts
179| Qty | Value | Footprint | References |
|---|---|---|---|
| 43 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C17, C19, C21, C23, C25, C26, C27, C28, C33, C35, C37, C39 +27 |
| 17 | 10u | Capacitor_SMD:C_1206_3216Metric | C10, C12, C14, C16, C34, C36, C38, C40, C53, C56, C57, C58, C59, C60, C61, C91 +1 |
| 17 | 33 | Resistor_SMD:R_0402_1005Metric | R15, R16, R17, R18, R22, R23, R24, R25, R28, R30, R33, R38, R39, R40, R41, R42 +1 |
| 14 | 10n | Capacitor_SMD:C_0402_1005Metric | C62, C66, C67, C70, C72, C73, C78, C79, C82, C83, C84, C85, C94, C97 |
| 12 | 1u | Capacitor_SMD:C_0603_1608Metric | C9, C11, C13, C15, C29, C30, C31, C32, C45, C47, C49, C51 |
| 10 | 4.7k | Resistor_SMD:R_0402_1005Metric | R10, R19, R26, R27, R29, R31, R32, R35, R36, R37 |
| 6 | 10k | Resistor_SMD:R_0402_1005Metric | R5, R6, R7, R11, R12, R20 |
| 5 | 4.7u | Capacitor_SMD:C_0805_2012Metric | C46, C48, C50, C52, C75 |
| 5 | Screw_Terminal_01x02 | Connector_Terminal:wuerth_691216410002 | J5, J6, J7, J8, J9 |
| 4 | 10p | Capacitor_SMD:C_0402_1005Metric | C18, C20, C22, C24 |
| 4 | 1k | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R4 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_ISO7380_Pad | H1, H2, H3, H4 |
| 4 | TAS2780 | Package_TI_QFN:TI-30-Pin-HR-QFN | U1, U2, U3, U4 |
| 2 | 470 | Resistor_SMD:R_0402_1005Metric | R8, R9 |
| 2 | Conn_Coaxial | Connector_Audio_Custom:cui_rcj_02x | J2, J4 |
| 1 | 1 | Resistor_SMD:R_0402_1005Metric | R34 |
| 1 | 100 | Resistor_SMD:R_0402_1005Metric | R45 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R14 |
| 1 | 13.7k | Resistor_SMD:R_0402_1005Metric | R13 |
| 1 | 150p | Capacitor_SMD:C_0402_1005Metric | C93 |
| 1 | 220 | Resistor_SMD:R_0402_1005Metric | R44 |
| 1 | 25LC512 | Package_SO:SOIC-8_5.275x5.275mm_P1.27mm | U11 |
| 1 | 4.7n | Capacitor_SMD:C_0402_1005Metric | C95 |
| 1 | 4.7u | Inductor_SMD:L_Abracon_ASPI-0630LR | L1 |
| 1 | 74AVC9112 | Package_SO:VSSOP-8_2.4x2.1mm_P0.5mm | U12 |
| 1 | 75 | Resistor_SMD:R_0402_1005Metric | R21 |
| 1 | ADAU1452 | Package_CSP:LFCSP-72-1EP_10x10mm_P0.5mm_EP5.3x5.3mm | U10 |
| 1 | AMS1117-1.8 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U6 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U5 |
| 1 | ASV-24.576MHz-EJ-T | Oscillator:Oscillator_SMD_Abracon_ASV-4Pin_7.0x5.1mm | X1 |
| 1 | BOOT | Button_Switch_SMD:SW_SPST_TL3342 | SW1 |
| 1 | Conn_01x16_Female | Connector_Debug:WR-WST REDFIT IDC 16 | J10 |
| 1 | DA100J | Transformer_Audio:SOIC-6 | T1 |
| 1 | Logo_Open_Hardware_Large | Symbol:OSHW-Symbol_6.7x6mm_SilkScreen | oshw1 |
| 1 | NRST | Button_Switch_SMD:SW_SPST_TL3342 | SW2 |
| 1 | REDFIT_SWD_10 | Connector_Debug:WR-WST REDFIT IDC 6 10 DBG | J12 |
| 1 | R_Potentiometer | Potentiometer_THT:Potentiometer_Bourns_PTV09A-1_Single_Vertical | RV1 |
| 1 | R_Potentiometer | Potentiometer_SMD:Potentiometer_Vishay_TS53YL_Vertical | RV2 |
| 1 | Raspberry_Pi_2_3 | Connector_Rpi:PinSocket_2x20_P2.54mm_Vertical | J11 |
| 1 | SS8550 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | STM32F401RBTx | Package_QFP:LQFP-64_10x10mm_P0.5mm | U9 |
| 1 | TPS54302 | Package_TO_SOT_SMD:SOT-23-6 | U7 |
| 1 | TSOP583xx | OptoDevice:Vishay_MINICAST-3Pin | U13 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U8 |
| 1 | USB_B | Connector_USB:USB_B_TE_5787834_Vertical | J1 |
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Questions
How big is the Dsp amplifier x4 PCB?
It measures 76 × 76.9 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Dsp amplifier x4 use?
179 parts, built around the STM32F401RCT6, 74AVC9112DCH, 25LC512-I/P and AMS1117-1.8. 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 Dsp amplifier x4 KiCad files?
From the blus-audio/hardware repository on GitHub, at the commit this page was made from: the board is blus-mini/kicad/dsp-amplifier-x4.kicad_pcb and its schematic blus-mini-mk2/kicad/amplifiers.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Dsp amplifier x4 design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).