2 layers50 × 23.2 mm
Analog
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
32 parts1kGPL-3.0
2 layers73 × 55 mm
Matrix display
chonki29/5x5-LED-matrix5x5x Led Matrix by hand
- Size
- 73 × 55 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 35
- Pads
- 94
- Tracks, vias
- 178, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 Aug 2026
- Updated
- 8 Sep 2026
Overview
Matrix display is an open-source printed circuit board by chonki29, from the chonki29/5x5-LED-matrix repository on GitHub. It is a 2-layer board of 73 × 55 mm with 32 parts on 35 nets, routed with 178 tracks and 0 vias.
Its parts include 25 diodes, 1 IC and 1 switch. It belongs with the lEDs and displays boards of this library.
README
README.mdDIY 5x5 LED Matrix Digital Dice
A DIY 5x5 LED matrix made with 25 LEDs, an ESP32 and a zero PCB.
The matrix can display numbers 1–6 and works as a simple digital dice. Pressing the button generates a random number and shows a short rolling animation before displaying the result.
Hardware
- ESP32
- 25 LEDs
- 5 × 330Ω resistors
- Push button
- Zero PCB
Pinout
Rows:
- R1 → GPIO 22
- R2 → GPIO 19
- R3 → GPIO 23
- R4 → GPIO 18
- R5 → GPIO 5
Columns:
- C1 → GPIO 27
- C2 → GPIO 26
- C3 → GPIO 25
- C4 → GPIO 33
- C5 → GPIO 32
Button → GPIO 4
Files
firmware/digital_dice.ino— ESP32 codePCB/matrix display.kicad_sch— KiCad schematicPCB/matrix display.kicad_pro— KiCad projectPCB/matrix display.kicad_pcb— KiCad PCB layoutBOM.csv— Bill of Materials
Build
Designed in KiCad, soldered onto a zero PCB and programmed using Arduino IDE.
ChatGPT was used to assist with the C++ code
thanks for checking out my project :)))
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 25 | LED | LED_THT:LED_D5.0mm | D26, D27, D28, D29, D30, D31, D32, D33, D34, D35, D36, D37, D38, D39, D40, D41 +9 |
| 5 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | RES1, RES2, RES3, RES4, RES5 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW1 |
| 1 | ~ | ESP32_DevKit:ESP32_30pin | U1 |
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Questions
How big is the Matrix display PCB?
It measures 73 × 55 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Matrix display use?
32 parts. 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 Matrix display KiCad files?
From the chonki29/5x5-LED-matrix repository on GitHub, at the commit this page was made from: the board is PCB/matrix display.kicad_pcb and its schematic PCB/matrix display.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Matrix display design in my own project?
Its repository states no licence, so its author keeps all rights: ask chonki29 before reusing the design.