2 layers59.8 × 129 mm
4 layers121 × 60 mm
AIO438
ZOUDIO/AIO43864x38W amplifier with DSP and BT
- Size
- 121 × 60 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 170
- Nets
- 189
- Pads
- 674
- Tracks, vias
- 1,038, 319
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 6 May 2021
- Updated
- 5 Jun 2025
Overview
AIO438 is an open-source printed circuit board by ZOUDIO, from the ZOUDIO/AIO438 repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 121 × 60 mm with 170 parts on 189 nets, routed with 1,038 tracks and 319 vias.
It is built around the ATMEGA328PB-AU, CP2102N-EK and FE1.1S, with the AMS1117-3.3, AP63357DV-7 and TPS2111PW among its other parts. Its parts include 61 capacitors, 56 resistors, 10 ICs, 10 connectors and 9 inductors. It belongs with the audio and music boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
6
ATMEGA328PB-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 27 2KB 32KB 8 Bit AVR Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、External pin reset (NRST)、Built-in general-purpose timer、Programmable watchdog、Touch function TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)CP2102N-EK
-- USB Conversion Modules ROHSSilicon LabsUSB Conversion ModulesFE1.1S
SSOP-28USB 2.0 USB Hub SSOP-28 USB Converters ROHSTerminus TechUSB Converters
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
AP63357DV-7
UncategorisedUnknown maker
TPS2111PW
TSSOP-8-40℃~+85℃ 1.25A 2 2.8V~5.5V 84mΩ Active High TSSOP-8 Power Distribution Switches ROHSTexas InstrumentsMonitors & Reset Circuits
README
README.mdZoudio AIO438
4x38W amplifier with DSP and BT
Based on:
- 2x Texas Instruments TAS5825M amplifiers
- Qualcomm QCC3031 Bluetooth module
- Atmel Atmega328PB microcontroller
Amplifier / DSP configuration is compiled by the Zoudio Configtool (zoudio.com/configtool)
Configuration is uploaded via the USB/UART connection and saved on an EEPROM
DSP flow is loaded at boot time.
Amplifier is always on, with a low-power (<100uA) 'off' state.
User control and state indication is done via a wiring harness with rotary encoder (on/off + volume), status LED and 3.5mm input.
Disclaimer
Design is not in production anymore as of March 2025.
Files are made open-source for inspiration only.
No support is provided.
Contact
info@zoudio.com
Parts
170| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | 10k | Resistor_SMD:R_0603_1608Metric | R11, R12, R13, R14, R15, R16, R18, R19, R21, R26, R27, R28, R29, R32, R33, R40 +3 |
| 14 | 100n | Capacitor_SMD:C_0603_1608Metric | C2, C3, C4, C13, C17, C18, C22, C38, C39, C43, C44, C46, C54, C60 |
| 14 | 1u | Capacitor_SMD:C_0805_2012Metric | C5, C6, C7, C20, C21, C24, C25, C37, C42, C45, C48, C49, C50, C51 |
| 13 | 1k | Resistor_SMD:R_0603_1608Metric | R2, R4, R7, R10, R35, R36, R38, R39, R42, R50, R52, R53, R54 |
| 8 | 0R | Resistor_SMD:R_0603_1608Metric | R30, R31, R34, R37, R43, R44, R47, R48 |
| 8 | 100k | Resistor_SMD:R_0603_1608Metric | R3, R6, R8, R22, R23, R25, R49, R55 |
| 8 | 10u | zoudio_footprints:Murata_1274AS-H-100M | L2, L3, L4, L5, L6, L7, L8, L9 |
| 8 | 15u | Capacitor_SMD:C_0805_2012Metric | C40, C41, C52, C53, C55, C56, C58, C59 |
| 8 | 470n | Capacitor_SMD:C_0805_2012Metric | C12, C14, C15, C16, C30, C31, C32, C33 |
| 8 | 470n | Capacitor_SMD:C_0603_1608Metric | C8, C9, C10, C11, C26, C27, C28, C29 |
| 6 | Blue | LED_SMD:LED_0603_1608Metric | D1, D3, D4, D5, D6, D7 |
| 5 | 10u | Capacitor_SMD:C_0805_2012Metric | C19, C23, C36, C47, C57 |
| 4 | Mounting hole | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | 18p | Capacitor_SMD:C_0603_1608Metric | C34, C35, C61 |
| 3 | Fiducial | Fiducial:Fiducial_0.75mm_Dia_1.5mm_Outer | FID1, FID2, FID3 |
| 3 | JST-PH 01x02 | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J5, J6, J11 |
| 3 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2, TP3 |
| 2 | 1M | Resistor_SMD:R_0603_1608Metric | R1, R5 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R17, R46 |
| 2 | TAS5825M | zoudio_footprints:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm_ThermalVias | U1, U2 |
| 1 | 1000u | zoudio_footprints:Cap_Rad_D10_P5_horizontal | C1 |
| 1 | 100R | Resistor_SMD:R_0603_1608Metric | R24 |
| 1 | 10u | Inductor_SMD:L_Bourns-SRN4018 | L1 |
| 1 | 12MHz | Crystal:Crystal_SMD_Abracon_ABM3C-4Pin_5.0x3.2mm | Y2 |
| 1 | 26V | Diode_SMD:D_SMA | D2 |
| 1 | 2k7 | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | 31k6 | Resistor_SMD:R_0603_1608Metric | R56 |
| 1 | 36k | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 5mm screwterminal 01x12 | zoudio_footprints:Multicomp_12P_5mm | J4 |
| 1 | 8MHz | Crystal:Crystal_SMD_Abracon_ABM3C-4Pin_5.0x3.2mm | Y1 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | AP63357DV-7 | zoudio_footprints:V-DFN3020-13 | U4 |
| 1 | ATmega328PB-AU | Package_QFP:TQFP-32_7x7mm_P0.8mm | U6 |
| 1 | BTM331 | zoudio_footprints:BTM331 | U10 |
| 1 | CP2102N | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U9 |
| 1 | FE1.1S | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U8 |
| 1 | JST-PH 01x03 | Connector_JST:JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J1 |
| 1 | JST-PH 01x08 | Connector_JST:JST_PH_B8B-PH-K_1x08_P2.00mm_Vertical | J7 |
| 1 | JST-PH 01x10 | Connector_JST:JST_PH_B10B-PH-K_1x10_P2.00mm_Vertical | J2 |
| 1 | M24256 EEPROM | Package_SO:TSSOP-8_4.4x3mm_P0.65mm | U7 |
| 1 | N-channel | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | P-Channel | zoudio_footprints:SOIC8_mosfet | Q1 |
| 1 | PCB antenna | zoudio_footprints:Texas_SWRA117D_2.4GHz_Left | AE1 |
| 1 | PinHeader 02x03 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J3 |
| 1 | TPS2111 | Package_SO:TSSOP-8_4.4x3mm_P0.65mm | U5 |
| 1 | U.FL | Connector_Coaxial:U.FL_Hirose_U.FL-R-SMT-1_Vertical | J10 |
| 1 | USB-C | zoudio_footprints:USB_C_Receptacle_Palconn_UTC16-G_pin_in_paste | J8 |
| 1 | ZOUDIO | zoudio_footprints:ZOUDIO25mm | LOGO1 |
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Questions
How big is the AIO438 PCB?
It measures 121 × 60 mm and has 4 copper layers, 1.6 mm thick.
What parts does the AIO438 use?
170 parts, built around the ATMEGA328PB-AU, CP2102N-EK, FE1.1S and AMS1117-3.3. 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 AIO438 KiCad files?
From the ZOUDIO/AIO438 repository on GitHub, at the commit this page was made from: the board is PCB/Mainboard/AIO438.kicad_pcb and its schematic PCB/Input_output_board/AIO_IO_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the AIO438 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).