4 layers90 × 55 mm
Analog board
taseraul/schrodinger-studio
Portable mixer with microphone preamp, bluetooth input, battery management, lighting system and modular design.
120 parts
4 layers90 × 55 mm
Basic digital
taseraul/schrodinger-studioPortable mixer with microphone preamp, bluetooth input, battery management, lighting system and modular design.
- Size
- 90 × 55 mm
- Copper layers
- 4
- Thickness
- 1.59 mm
- Parts
- 177
- Nets
- 184
- Pads
- 621
- Tracks, vias
- 1,068, 320
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 7 Jul 2022
- Updated
- 11 Sep 2025
Overview
Basic digital is an open-source printed circuit board by taseraul, from the taseraul/schrodinger-studio repository on GitHub. It is a 4-layer board of 90 × 55 mm with 177 parts on 184 nets, routed with 1,068 tracks and 320 vias.
It is built around the ESP32-WROOM-32, NE5532 and TPS54331DR-JSM, with the BQ24072RGTR, PCM5102PW and MMBT4403 among its other parts. Its parts include 81 capacitors, 51 resistors, 13 connectors, 11 ICs and 3 inductors. It belongs with the audio and music boards and the ESP32 and STM32 boards of this library.
Main components
6
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
NE5532
SOP-8-22V~22V 0℃~+70℃ 100dB 10nA 14mA 2 40V/us 42mA 4mV 800nA 8nV/√Hz@30Hz Built-in compensation SOP-8 Operational Amplifier ROHSSungineOperational Amplifier
TPS54331DR-JSM
SOP-8-40℃~+125℃ 1 2mA 3A 4.5V~40V 400kHz Adjustable Buck Built-in No Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting Step-down type SOP-8 DC-DC Converters ROHSJSMSEMIDC-DC Converters
BQ24072RGTR
QFN-16-EP(3x3)-40℃~+125℃ 1 1.5A 1.5mA 4.2V 4.35V~6.6V Charging IC Lithium Battery Support QFN-16-EP(3x3) Battery Management ROHSTexas InstrumentsBattery Management
PCM5102PW
TSSOP-20-25℃~+85℃ 1 3V~3.6V Digital filtering、Power-down mode I2S TSSOP-20 ADCs/DACs - Special Purpose ROHSTexas InstrumentsADCs/DACs - Special Purpose
MMBT4403
SOT-23-55℃~+150℃ 1 PNP 100 100nA 200MHz 300mW 400mV 40V 5V 600mA PNP SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
Parts
177| Qty | Value | Footprint | References |
|---|---|---|---|
| 31 | 10u | Capacitor_SMD:C_0603_1608Metric | C3, C4, C10, C11, C19, C20, C22, C23, C25, C26, C27, C34, C40, C43, C45, C46 +15 |
| 18 | 10k | Resistor_SMD:R_0603_1608Metric | R10, R18, R33, R34, R35, R36, R37, R38, R39, R40, R43, R45, R47, R48, R49, R50 +2 |
| 12 | 100n | Capacitor_SMD:C_0603_1608Metric | C6, C8, C28, C29, C30, C42, C56, C66, C69, C71, C72, C76 |
| 8 | 1n | Capacitor_SMD:C_0603_1608Metric | C7, C31, C32, C33, C44, C57, C67, C77 |
| 8 | 1u | Capacitor_SMD:C_0603_1608Metric | C1, C2, C14, C16, C17, C64, C78, C79 |
| 7 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C35, C36, C41, C50, C53, C54, C83 |
| 6 | 10n | Capacitor_SMD:C_0603_1608Metric | C9, C47, C48, C60, C61, C73 |
| 6 | Conn_01x05 | Connector_Harwin:Harwin_M20-89005xx_1x05_P2.54mm_Horizontal | J7, J8, J9, J10, J12, J13 |
| 6 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2, TP3, TP4, TP5, TP6 |
| 5 | 0 | Resistor_SMD:R_0603_1608Metric | R8, R16, R17, R19, R42 |
| 5 | 100 | Resistor_SMD:R_0603_1608Metric | R23, R24, R31, R32, R46 |
| 4 | 100k/NC | Resistor_SMD:R_0603_1608Metric | R52, R53, R55, R56 |
| 4 | 220k | Resistor_SMD:R_0603_1608Metric | R21, R22, R29, R30 |
| 4 | 5.1k | Resistor_SMD:R_0603_1608Metric | R4, R25, R26, R41 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.7mm_Pad | H1, H2, H3, H4 |
| 3 | NE5532 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2, U5, U6 |
| 2 | 10p | Capacitor_SMD:C_0603_1608Metric | C80, C81 |
| 2 | 2.2u | Capacitor_SMD:C_0603_1608Metric | C37, C38 |
| 2 | 20R | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | 2k | Resistor_SMD:R_0603_1608Metric | R7, R9 |
| 2 | 4.7u | Inductor_SMD:L_Vishay_IHLP-1212 | L1, L2 |
| 2 | 47k | Resistor_SMD:R_0603_1608Metric | R14, R15 |
| 2 | 47u | Capacitor_SMD:C_1206_3216Metric | C15, C84 |
| 2 | Conn_01x03 | Connector_Harwin:Harwin_M20-89003xx_1x03_P2.54mm_Horizontal | J3, J11 |
| 2 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_2x03_P2.54mm_Vertical | J4, J5 |
| 2 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U7, U8 |
| 2 | FerriteBead_Small | Capacitor_SMD:C_0805_2012Metric | FB1, FB2 |
| 1 | 1000p | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 10u/25v | Capacitor_SMD:C_0805_2012Metric | C39 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R44 |
| 1 | 29.4k | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 3.3k | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 4.7p | Capacitor_SMD:C_0603_1608Metric | C13 |
| 1 | 6.8u | Inductor_SMD:L_7.3x7.3_H4.5 | L3 |
| 1 | 8Mhz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | BC849 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | BQ24072RGT | Package_DFN_QFN:VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm | U3 |
| 1 | Conn_01x02 | Connector_Harwin:Harwin_M20-89003xx_1x03_P2.54mm_Horizontal | J6 |
| 1 | Conn_01x05 | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | D_Schottky | Diode_SMD:D_SOD-123 | D1 |
| 1 | LOGO | LOGO | G*** |
| 1 | MMBT4403 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | NC | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | PCM1808PWR | SamacSys_Parts:PCM1808PWR | IC3 |
| 1 | PCM5102 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U4 |
| 1 | STM32F103C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SW_SPST | Connector_Harwin:Harwin_M20-89003xx_1x03_P2.54mm_Horizontal | SW1 |
| 1 | TPS54331DR | SamacSys_Parts:SOIC127P600X175-8N | IC2 |
| 1 | TPS65133DPDR | SamacSys_Parts:SON45P300X300X80-13N-D | IC1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_Amphenol_12401610E4-2A_CircularHoles | J1 |
Questions
How big is the Basic digital PCB?
It measures 90 × 55 mm and has 4 copper layers, 1.59 mm thick.
What parts does the Basic digital use?
177 parts, built around the ESP32-WROOM-32, NE5532, TPS54331DR-JSM and BQ24072RGTR. 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 Basic digital KiCad files?
From the taseraul/schrodinger-studio repository on GitHub, at the commit this page was made from: the board is Hardware/basic_digital/basic_digital.kicad_pcb and its schematic Hardware/analog_board/amp1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Basic digital design in my own project?
Its repository states no licence, so its author keeps all rights: ask taseraul before reusing the design.
More from taseraul/schrodinger-studio
3- 2 layers75 × 40 mm
Mood
taseraul/schrodinger-studio
Portable mixer with microphone preamp, bluetooth input, battery management, lighting system and modular design.
91 parts - 2 layers90 × 32 mm
Link
taseraul/schrodinger-studio
Portable mixer with microphone preamp, bluetooth input, battery management, lighting system and modular design.
23 parts
Similar boards
- 2 layers44.2 × 2.2 mm
- 4 layers120 × 108 mm
- 2 layers68 × 81.5 mm
- 2 layers102 × 37 mm
- 2 layers70 × 65 mm
Fluepdot
Fluepke/Fluepdot
Project for controlling Annax flipdot panels used by the Berliner Verkehrsbetriebe
116 parts17AGPL-3.0 - 2 layers95 × 60 mm
- 2 layers97.5 × 97.5 mm
Aiwa internet
Amagami45/Internet-radio
This project is about building an internet radio receiver which will change the audio output to analog, which will be transferred to an old FM radio (AIWA). From the radio, audio will come out to connected speakers.
52 partsAGPL-3.0 - 2 layers72 × 80 mm
Junior's Amp
Kaptain2026/AUDIO-AMPLIFIER-PCB-DESIGN
I designed an audio amplifier pcb for my personal consumption. It has controls for Bass, Tremble and Volume. In addition you can connect to it through Bluetooth and play your music directly.
96 parts