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Master

Hong-Kong-Public-Transport·RC-Bus-System·pcb/master.kicad_pcb

Master PCB layout, top view — open source ESP32 board by Hong-Kong-Public-Transport

About the Master PCB

Master is an open source ESP32 PCB design by Hong-Kong-Public-Transport, published on GitHub. It is a 2-layer board measuring 60 × 30 mm, with 29 components from 16 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the AP2112K-3.3. By type, the board carries 13 resistors, 6 capacitors, 5 connectors, 3 diodes and 2 ICs.

From the project

An advanced RC bus system using multiple ESP32 modules.

Main components on the Master

AP2112K-3.3ESP32-S3-WROOM-1

Master bill of materials (BOM)

29 components, 16 distinct parts.

QtyPartRefs
1
AP2112K-3.3
U1
1
ESP32-S3-WROOM-1
U2
1
Micro_SD_Card_Det2
J1
3
Display Connector Output
J2, J3, J4
1
USB_C_Receptacle_USB2.0_16P
J5
1
Green LED
D1
1
Yellow LED
D2
1
Red LED
D3
2
10uF
C1, C5
2
0.1uF
C2, C6
1
1uF
C3
1
2.2uF
C4
6
10k
R1, R2, R4, R5, R6, R13
3
470R
R3, R7, R8
2
5.1k
R9, R10
2
22R
R11, R12

Master design files

The KiCad project lives in the Hong-Kong-Public-Transport/RC-Bus-System repository on GitHub; these links point at the commit this page was built from.

Master: common questions

What microcontroller does the Master use?

The Master is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the Master PCB?

The Master measures 60 × 30 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Master?

29 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Master design files?

From the Hong-Kong-Public-Transport/RC-Bus-System repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Master design in my own project?

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

Can I test firmware for the Master 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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