2 layers39.6 × 49.1 mm
2 layers45.8 × 29.4 mm
Minrc ref
qwertpas/pcblearningprojects for learning/teaching PCB design
- Size
- 45.8 × 29.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 4
- Nets
- 28
- Pads
- 44
- Tracks, vias
- 21, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 2 Apr 2026
- Updated
- 31 May 2026
Overview
Minrc ref is an open-source printed circuit board by qwertpas, from the qwertpas/pcblearning repository on GitHub. It is a 2-layer board of 45.8 × 29.4 mm with 4 parts on 28 nets, routed with 21 tracks and 0 vias.
It is built around the ESP32-S3R8 and DRV8837DSG. Its parts include 3 ICs and 1 connector. It belongs with the ESP32 boards of this library.
Main components
2
ESP32-S3R8
QFN-56(7x7)-40℃~+65℃ -74.2dBm 150Mbps 18.5dBm 2.412GHz~2.484GHz 2.4GHz 283mA 3V~3.6V 88mA Bluetooth、WiFi DMA function SPI、USB、UART、I2C、I2S transceiver QFN-56(7x7) RF Transceiver ICs ROHSEspressif SystemsRF Transceiver ICs
DRV8837DSG
WSON-8-EP(2x2)-40℃~+85℃ 1.8V~7V 1.9A 120nA 280mΩ Yes WSON-8-EP(2x2) Brushed DC Motor Drivers ROHSTexas InstrumentsBrushed DC Motor Drivers
README
readme.mdpcblearning
A collection of PCB and firmware projects for learning PCB design. Projects are designed to have few components, cheap, yet rich in potential features.
Using common libraries
- After creating a new project in KiCad, copy the contents of
copy-into-your-projectinto the same folder that contains your project's.kicad_pcbfile. - Restart KiCad. When you place new components in the schematic or PCB editor, the
pcblearninglibrary should be available.
minrc1
Tiny wheeled robot with two PM08 stepper motors, three microphones, and a buzzer. ESP32S3 supermini dev board allows for wireless control, USB-C battery charging, and running small neural networks. Microphones and buzzer may be useful for locating other robots, echolocation, and detecting surface properties (through vibration/noise from ground contact).
minrc-ref
Even more minimal than minrc1: just an ESP32S3-supermini, 4x DRV8837 motor drivers, 2x stepper motors, and resistor divider voltage sense. Intended as a reference design to be used as a starting point.
Parts
4Questions
How big is the Minrc ref PCB?
It measures 45.8 × 29.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Minrc ref use?
4 parts, built around the ESP32-S3R8 and DRV8837DSG. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Minrc ref KiCad files?
From the qwertpas/pcblearning repository on GitHub, at the commit this page was made from: the board is minrc-ref/minrc-ref_pcb/minrc-ref.kicad_pcb and its schematic common-lib-editor/common-lib-editor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Minrc ref design in my own project?
Its repository states no licence, so its author keeps all rights: ask qwertpas before reusing the design.
More from qwertpas/pcblearning
1Similar boards
- 2 layers58 × 61 mm
- 4 layers78 × 59 mm
- 4 layers74.5 × 70.3 mm
Nest mini v2-drop in pcb
iMike78/nest-mini-drop-in-pcb
Drop-in PCB replacement for the Google Nest Mini v2 with ESP32-S3, ESP32-P4 and optional ESP32-C6. Inspired by Onju Voice and Home Assistant Voice PE.
229 parts628CERN-OHL-S-2.0 - 2 layers39.5 × 50.7 mm
MeterReadouts
ryanhulke/nuclear-fusor
Open-source hardware, embedded software, and control panel software for nuclear fusor operation.
22 parts21MIT - 4 layers54.7 × 75.8 mm
- 4 layers
CABadge V2 1
nbtca/CABadge
CABadge 计协电子吧唧：基于 ESP32-S3 的开源圆屏互动徽章，支持动态壁纸、触摸交互、Wi-Fi/BLE 和趣味小应用，提供 PCB、3D 打印外壳、固件及配套工具。
110 parts15MIT - 4 layers60.6 × 27.6 mm
Display pcb
HW-Lab-Hardware-Design-Agency/WebScreen-PCB
WebScreen PCB designs, BOM and other manufacturing files.
93 parts13CERN-OHL-P-2.0 - 4 layers23 × 42 mm
ESP32S3 M.2 Board
ItsNotDaan/LiberBoard
LiberBoard: An open-source, modular platform for learning electronics. Offers LiBo ARM-based PCBs and add-on boards with practical exercises and code snippets. Designed for easy learning and project creation.
69 parts8CERN-OHL-P-2.0