Mainboard
About the Mainboard PCB
Mainboard is an open source ESP32 PCB design by pumpingstationone, published on GitHub under the MIT license. It is a 4-layer board measuring 89.6 × 90 mm, with 72 components from 21 distinct parts.
Its main chip is the ESP32-WROOM-32U, from the ESP32 family. Other key parts include the XL1509, AMS1117-3.3 and TRANS_CAN_SN65HVD230DR. By type, the board carries 27 resistors, 12 transistors, 12 capacitors, 9 connectors, 4 ICs and 4 diodes.
It belongs with the iot & wireless designs in this gallery.
From the project
web server to run lockers system
to run, type in root directory of this repo:
Main components on the Mainboard
Mainboard bill of materials (BOM)
72 components, 21 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | XL1509 | SOIC-8_3.9x4.9mm_P1.27mm | U101 |
| 1 | ESP32-WROOM-32U | ESP32-WROOM-32U_evezor | U102 |
| 1 | AMS1117-3.3 | SOT-223-3_TabPin2 | U103 |
| 1 | TRANS_CAN_SN65HVD230DR Trans_CAN_SN65HVD230DR | CAN-TRANS-SN65HVD230DR | U104 |
| 12 | BSS138 | SOT-23 | Q101, Q102, Q103, Q104, Q105, Q106, Q107, Q108 +4 |
| 5 | RJ45_SHIELDED RJ45_Shielded | RJ45_Amphenol_RJHSE5380 | J101, J102, J103, J104, J105 |
| 1 | CONN_01X02_MOUNTINGPIN Conn_01x02_MountingPin | JST_VH_2_VERTICAL | J106 |
| 2 | CONN_01X04 Conn_01x04 | JST_PH_S4B-PH-SM4-TB_1x04-1MP_P2.00mm_Horizontal | J107, J108 |
| 1 | ftdi_conn | JST_SH_BM06B-SRSS-TB_1x06-1MP_P1.00mm_Vertical | J109 |
| 2 | SW_Push | SWITCH_2x3_SMD_TACTILE_GREEN | SW101, SW102 |
| 1 | TestPoint | TestPoint_THTPad_D1.0mm_Drill0.5mm | TP1 |
| 1 | SX35_SCHOTTKY | D_SMA | D101 |
| 1 | D_TVS_X2_AAC D_TVS_x2_AAC | SOT-23 | D102 |
| 1 | led_g | LED_0603_1608Metric | D103 |
| 1 | SK6812MINI | LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D104 |
| 1 | 68UF 68uF | INDUCTOR-68uH | L101 |
| 2 | 220UF 220uF | CP_Elec_10x10.5 | C101, C105 |
| 2 | 4.7uF 100V | C_0805_2012Metric | C102, C107 |
| 5 | 22UF 22uF | C_0805_2012Metric | C103, C104, C106, C108, C111 |
| 3 | .1uF | C_0603_1608Metric | C109, C110, C112 |
Show 1 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 27 | 10K 10k | R_0603_1608Metric | R101, R102, R103, R104, R105, R106, R107, R108 +19 |
Mainboard design files
The KiCad project lives in the pumpingstationone/ps1_lockers repository on GitHub; these links point at the commit this page was built from.
Mainboard: common questions
What microcontroller does the Mainboard use?
The Mainboard is built around the ESP32-WROOM-32U, from the ESP32 family.
How big is the Mainboard PCB?
The Mainboard measures 89.6 × 90 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Mainboard?
72 components, from 21 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 Mainboard design files?
From the pumpingstationone/ps1_lockers 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 Mainboard design in my own project?
Yes, under the terms of its MIT license, which pumpingstationone chose for the repository.
Can I test firmware for the Mainboard 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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