Substructure Main
About the Substructure Main PCB
Substructure Main is an open source ESP32 PCB design by Cyberspecies, published on GitHub. It is a 4-layer board measuring 40 × 35.5 mm, with 52 components from 38 distinct parts.
Its main chip is the ESP32-S3-WROOM-1U, from the ESP32 family. Other key parts include the LD1117S33TR_SOT223, LD1117S50TR_SOT223, USB2513B_Bi, MCP7940N-xMNY and Sensored. By type, the board carries 27 capacitors, 7 resistors, 5 ICs, 2 crystals, 1 connector and 1 diode.
It belongs with the audio and displays & leds designs in this gallery.
Main components on the Substructure Main
Substructure Main bill of materials (BOM)
52 components, 38 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LD1117S33TR_SOT223 | SOT-223-3_TabPin2 | U6 |
| 1 | LD1117S50TR_SOT223 | SOT-223-3_TabPin2 | U7 |
| 1 | USB2513B_Bi | QFN-36-1EP_6x6mm_P0.5mm_EP3.7x3.7mm | U8 |
| 1 | MCP7940N-xMNY | DFN-8-1EP_3x2mm_P0.5mm_EP1.36x1.46mm | U9 |
| 1 | Sensored | Sensored | U11 |
| 1 | TSX-3225 24MF18X-C0 | Crystal_SMD_SeikoEpson_TSX3225-4Pin_3.2x2.5mm_HandSoldering | Y1 |
| 1 | CM7V-T1A | Crystal_SMD_MicroCrystal_CC7V-T1A-2Pin_3.2x1.5mm_HandSoldering | Y2 |
| 1 | C514175 MicroSD | MicroSD_473092651 | J2 |
| 1 | SW_Push | R-667843 | BootSW1 |
| 1 | C Pins | PinHeader_1x08_P1.27mm_Vertical | C_Pins1 |
| 1 | Coin Cell | JST_GH_SM02B-GHS-TB_1x02-1MP_P1.25mm_Horizontal | Coin_Cell1 |
| 1 | ESP32-S3-WROOM-1U | ESP32-S3-WROOM-1U | ESP1 |
| 1 | F FFC | FFC-8-0.5 | F_FFC1 |
| 1 | G0 FFC | FFC-8-0.5 | G0_FFC1 |
| 1 | G1 FFC | FFC-8-0.5 | G1_FFC1 |
| 1 | M FFC | FFC-10-0.5 | M_FFC1 |
| 1 | S FFC | FFC-8-0.5 | S_FFC1 |
| 1 | WS2812B-2020 | LED_WS2812B-2020_PLCC4_2.0x2.0mm | D1 |
| 1 | 10UF 0.1uf | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1 |
| 2 | 0.1UF 0.1uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C2, C10 |
Show 18 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 0.1UF 10uf | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3 |
| 1 | 10UF 10uf | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4 |
| 1 | 10UF 1uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5 |
| 1 | 1UF 1uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C6 |
| 1 | 22UF 22uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7 |
| 1 | 0.1UF 22uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C8 |
| 1 | 22UF 0.1uF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C9 |
| 1 | 22UF 18pf | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C11 |
| 1 | 0.1UF 18pf | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C12 |
| 2 | 1uF | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C13, C17 |
| 11 | 0.1uF | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C14, C15, C16, C18, C19, C20, C21, C22 +3 |
| 1 | 10pf | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C26 |
| 1 | 12pf | C_0402_1005Metric_Pad0.74x0.62mm_HandSolder | C27 |
| 2 | 5.1K 10K | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | 10K | R_0603_1608Metric | R3, R4 |
| 1 | 10K 1M | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R5 |
| 1 | 10K 100K | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R6 |
| 1 | 145OHM 12K | R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R7 |
Substructure Main design files
The KiCad project lives in the Cyberspecies/Synth-Head repository on GitHub; these links point at the commit this page was built from.
Substructure Main: common questions
What microcontroller does the Substructure Main use?
The Substructure Main is built around the ESP32-S3-WROOM-1U, from the ESP32 family.
How big is the Substructure Main PCB?
The Substructure Main measures 40 × 35.5 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Substructure Main?
52 components, from 38 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 Substructure Main design files?
From the Cyberspecies/Synth-Head 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 Substructure Main design in my own project?
The repository has no license, so all rights stay with Cyberspecies. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Substructure Main 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.
More boards in Synth-Head
ESP32Batch (4 Layer SMT)
100 × 100 mm68 parts4LNo license10
Substructure Power Distribution
55 × 20 mm64 parts4LNo license10
4 layer Batch
60 × 89.5 mm58 parts4LNo license10
Main Head CPU
50 × 47.5 mm53 parts4LNo license10
Substructure Boop Board
30 × 40 mm41 parts2LNo license10
ESP32Combined Fabrication
92 × 82.5 mm38 parts2LNo license10
Substructure GPU
60 × 35 mm37 parts4LNo license10
ESP32Substructure Snoot Board
50 × 35 mm35 parts4LNo license10
Batch (2 Layer Non SMT)
100 × 100 mm20 parts2LNo license10
Substructure Display Adapter
29 × 30 mm16 parts2LNo license10
2 Layer Batch
50 × 45 mm8 parts2LNo license10
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