Digiefx board
mesotokyo·digiefx_board
About the Digiefx board
Digiefx board is an open source ESP32 PCB design by mesotokyo, published on GitHub. It is a 4-layer board measuring 50 × 50 mm, with 64 components from 26 distinct parts.
Its main chip is the XIAO-ESP32-S3-PLUS-SMD, from the ESP32 family. Other key parts include the OP07CDR, TLV2365, L78M05ABDT and V4220M. By type, the board carries 29 capacitors, 19 resistors, 8 ICs, 2 transistors, 1 crystal and 1 connector.
It belongs with the audio designs in this gallery.
From the project
Digital Audio Processor Board Schematic and PCB design
ESP32S3を搭載した小型マイコンボード「Seeed Studio XIAO ESP32-S3 Plus」と、ADコンバータおよびDAコンバータを内蔵したIC「COOLAUDIO V4220M」を使ったデジタルオーディオ信号処理に必要な、最低限の回路をプリント基板として実装したデザインデータです。KiCAD 9.xで作成しています。
kicadディレクトリ内に本ボードを他のプロジェクトから利用するためのフットプリント( DigiEfxBoard v1.0.kicadmod )およびシンボル( digiefxboardv1.0.kicadsym` )を格納しています。
J1 に実装したピンヘッダ(もしくはピンソケット)経由で電源やオーディオ入出力、マイコンボードのIOピンへのアクセスなどを行います。多くのピンはESP32マイコンのGPIOポートに直接接続しているため、ショートや入力電圧にはご注意ください。出力ピンをGNDに接続したり、入力ピンに0V未満、もしくは3.3Vを超える電圧を入力するとマイコンが破損する可能性があります。

Main components on the Digiefx board
Digiefx board bill of materials (BOM)
64 components, 26 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | OP07CDR | JEITA_SOIC-8_3.9x4.9mm_P1.27mm | U1, U2 |
| 2 | TLV2365 | JEITA_SOIC-8_3.9x4.9mm_P1.27mm | U3, U4 |
| 1 | L78M05ABDT L78M05ABDT-TR | TO-252-2 | U5 |
| 1 | V4220M | SSOP-28_5.3x10.2mm_P0.65mm | U6 |
| 1 | V4220M | DIP-28_W15.24mm_Socket | U7 |
| 1 | XIAO-ESP32-S3-PLUS-SMD XIAO-ESP32-S3-Plus-SMD | XIAO-ESP32-S3-Plus-THT | U8 |
| 2 | MMBT3904 | SOT-23 | Q1, Q2 |
| 1 | 12.288MHZ 12.288MHz | Crystal_SMD_HC49-SD | Y1 |
| 1 | CTRL_BUS | PinHeader_1x19_P2.54mm_Vertical | J1 |
| 1 | CLOCK | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1 |
| 1 | SW_DIP_X02 SW_DIP_x02 | SW_DIP_SPSTx02_Slide_Copal_CHS-02B_W7.62mm_P1.27mm | SW1 |
| 1 | 1N5819WS | D_SOD-323 | D1 |
| 1 | 10U 10u | L_1210_3225Metric_Pad1.42x2.65mm_HandSolder | L1 |
| 1 | 100U 100u | CP_EIA-7343-43_Kemet-X_HandSolder | C1 |
| 10 | 0.1U 0.1u | C_0603_1608Metric | C2, C4, C5, C6, C7, C8, C9, C11 +2 |
| 4 | 10U 10u | C_0603_1608Metric | C3, C10, C14, C18 |
| 2 | 1u | C_1206_3216Metric | C12, C13 |
| 1 | 1u | C_0603_1608Metric | C16 |
| 4 | 680P 680p | RUBYCON_F2D_P3.5 | C19, C21, C24, C27 |
| 4 | 150P 150p | C_Rect_L5.7mm_W3.7mm_P3.5mm | C20, C22, C23, C25 |
Show 6 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 22P 22p | C_0603_1608Metric | C26, C28 |
| 1 | 100U 100u | C_Radial_D6.3mm_H5.0mm_P2.50mm | C29 |
| 1 | 3.9K 3.9k | R_0603_1608Metric | R1 |
| 3 | 4.7K 4.7k | R_0603_1608Metric | R2, R16, R17 |
| 12 | 10K 10k | R_0603_1608Metric | R3, R4, R5, R6, R7, R8, R9, R10 +4 |
| 3 | 10K 10k | R_Array_Convex_4x0603 | RN1, RN2, RN3 |
Digiefx board design files
The KiCad project lives in the mesotokyo/digiefx_board repository on GitHub; these links point at the commit this page was built from.
- Layoutdigiefx_board.kicad_pcb
- Schematicdigiefx_board.kicad_sch
- BOMbom.csv
Digiefx board: common questions
What microcontroller does the Digiefx board use?
The Digiefx board is built around the XIAO-ESP32-S3-PLUS-SMD, from the ESP32 family.
How big is the Digiefx board?
The Digiefx board measures 50 × 50 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Digiefx board?
64 components, from 26 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Digiefx board design files?
From the mesotokyo/digiefx_board repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Digiefx board design in my own project?
The repository has no license, so all rights stay with mesotokyo. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Digiefx board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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