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Mainboard

KavyanshKhaitan2·overenginnered-docking-station·pcb/_restore_backup_2026-06-01T10-27-37-852/mainboard.kicad_pcb

Mainboard PCB layout, top view — open source ESP32 board by KavyanshKhaitan2
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About the Mainboard PCB

Mainboard is an open source ESP32 PCB design by KavyanshKhaitan2, published on GitHub. It is a 2-layer board measuring 209.9 × 122.9 mm, with 81 components from 37 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the FE1.1S, LM1117F-3.3, AMS1117-1.8 and LM5148RGYR. By type, the board carries 29 capacitors, 21 resistors, 13 connectors, 7 ICs, 4 transistors and 3 crystals.

It belongs with the displays & leds, keyboards and iot & wireless designs in this gallery.

From the project

A simple docking station to dock your laptop using USB-C!

A very cool laptop docking station with 9 USB-A 2.0 ports!

1. Why? 2. What can it do? 3. Fallout Zine 4. PCB - Mainboard - Left Daughterboard 5. Schematic - Mainboard - Left Daughterboard - Right Daugtherboard - Front Daugtherboard 6. 3D - Main case - Macropad assembly - Macropad case - ePaper assembly - ePaper case 7. Bill of Materials

I made this docking station to change that.

Mainboard, from the project README
From the project README

Main components on the Mainboard

FE1.1SLM1117F-3.3AMS1117-1.8ESP32-S3-WROOM-1LM5148RGYR

Mainboard bill of materials (BOM)

81 components, 37 distinct parts — part numbers from the project's BOM.

QtyPartRefs
3
FE1.1S
FE1.1s
U1, U5, U6
1
LM1117F-3.3
U2
1
AMS1117-1.8
LM1117F-1.8
U3
1
ESP32-S3-WROOM-1
U4
1
LM5148RGYR
U7
2
FAN_4PIN
Fan_4pin
M1, M2
2
CSD17579Q5A
Q1, Q2
2
IRLZ44N
Q3, Q4
3
T49S12MLDBE2X
Y1, Y3, Y4
1
DC022B (external)
J2
1
CONN_01X09
Conn_01x09
J4
2
USB_A
J5, J7
1
CONN_01X06
Conn_01x06
J10
1
CONN_01X06
Conn_01x06
J11
2
USB_C_RECEPTACLE_USB2.0_16P
USB_C_Receptacle_USB2.0_16P
J15, J19
3
CONN_01X02
Conn_01x02
J20, J24, J27
2
CONN_01X04
Conn_01x04
J21, J25
1
SW_SPST
SW1
1
560nH|8.3mΩ
L2
20
0.1UF
0.1uF
C1, C2, C3, C4, C5, C6, C7, C8 +12
Show 17 more
QtyPartRefs
1
2.2uF|9mΩ
C17
2
3.4uF|4.66mΩ
C19, C23
1
2.2NF
2.2nF
C20
1
6.8PF
6.8pF
C21
2
100nF|1mΩ
C22, C28
2
10uF|3mΩ
C26, C27
3
2.7k±1%
R1, R6, R8
1
40.2K
40.2k
R3
1
9.53K
9.53k
R4
3
5k±10%
R5, R7, R22
1
100K
100k
R9
1
24.3K
24.3k
R10
1
2.8K
2.8k
R11
1
6m
R12
2
10K
10k
R13, R14
5
5.1K
5.1k
R15, R16, R17, R18, R21
2
1k
R19, R20

Mainboard design files

The KiCad project lives in the KavyanshKhaitan2/overenginnered-docking-station 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-S3-WROOM-1, from the ESP32 family.

How big is the Mainboard PCB?

The Mainboard measures 209.9 × 122.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mainboard?

81 components, from 37 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 KavyanshKhaitan2/overenginnered-docking-station 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?

The repository has no license, so all rights stay with KavyanshKhaitan2. Use it as a reference, and ask the author before reusing the design.

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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