4 layers406.4 × 254 mm
4 layers58 × 58 mm
Rgb matrix
joh/rgb-matrix3RGB Matrix with USB and 48-bit colors!
- Size
- 58 × 58 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 138
- Nets
- 125
- Pads
- 436
- Tracks, vias
- 1,409, 147
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 3 Oct 2017
- Updated
- 18 Dec 2023
Overview
Rgb matrix is an open-source printed circuit board by joh, from the joh/rgb-matrix repository on GitHub. It is a 4-layer board of 58 × 58 mm with 138 parts on 125 nets, routed with 1,409 tracks and 147 vias.
It is built around the STM32F405RGT6, 74AC244PC and LD3985M33R, with the ULN2803A and USBUF01W6 among its other parts. Its parts include 29 resistors, 22 capacitors, 16 connectors, 7 ICs and 2 diodes. It belongs with the lEDs and displays boards and the STM32 boards of this library.
Main components
5
STM32F405RGT6
LQFP-64(10x10)-40℃~+85℃ 1.8V~3.6V 12bit 12bit 168MHz 192KB 1MB 32 Bit 51 ARM Cortex-M4 Built-in FLASH LQFP-64(10x10) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
74AC244PC
PDIP-20-40℃~+85℃ 2 24mA 24mA 2V~6V 4 40uA 5ns@5V,50pF 74AC Output enable Tri-State PDIP-20 Buffers, Drivers, Receivers, Transceivers ROHSonsemiBuffers, Drivers, Receivers, Transceivers
LD3985M33R
SOT-23-5L-40℃~+125℃@(Tj) 1 150mA 150uA 3.3V 30uVrms 50dB@(10kHz) 60mV@(150mA) 6V Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
ULN2803A
SOP-18-300mil-40℃~+85℃ 0.93mA 100uA 15pF 20uA 30V 500mA 50V 8 SOP-18-300mil Darlington Transistor Arrays ROHSUMWDarlington Transistor Arrays
USBUF01W6
SOT323-6L-40℃~+125℃ 33Ω 47pF Yes SOT323-6L EMI/RFI Filters (LC, RC Networks) ROHSSTMicroelectronicsEMI/RFI Filters (LC, RC Networks)
README
hardware/README.mdHardware
The board is based around an STM32F405 microcontroller which drives each LED with 16-bit hardware PWM. It also handles USB, SPI, etc.
Each column is driven by SN74AC244 buffers, while the rows are driven by TBD62783 (common anode) or TBD62083/ULN2803A (common cathode).
PCB
The PCB is 4 layers and connects with the LED matrix like a backpack.
The PCB was designed to handle currents up to 6A, which typically means max 8 panels in series, with the limiting component being the pin headers.
BOM
TODO
Assembly
TODO: Some tips on soldering the board
Common cathode / common anode
TODO: info on components for CA/CC + jumpers
Power options
TODO: info about the jumpers
Tiling
TODO: how to set jumpers
Supported RGB displays
The board was originally designed for the 8x8 RGB Matrix sold by SparkFun (now sadly discontinued). Luckily there are plenty of displays on the market which are pin compatible. Some of them are listed below.
Any display with the same form factor should work, as long as the rows are on pins 7-10 and 23-26. Exactly which rows and columns are where is less important: they can be easily remapped in firmware.
TODO: picture
If you find a display that looks compatible which is not in the list below, please let me know so I can add it!
Tested displays:
- YSM-2388CRGBC (common cathode, retired)
- ARK-SZ912388RGB (common anode)
Should work:
- Betlux BL-M23B881RGB-11 (common cathode)
- LEDM88RGBCC (common cathode)
Parts
138| Qty | Value | Footprint | References |
|---|---|---|---|
| 24 | 100 | rgb-matrix:R_0805 | R1, R2, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23 +8 |
| 12 | 100nF | rgb-matrix:C_0805 | C1, C5, C6, C7, C11, C12, C15, C16, C17, C18, C21, C22 |
| 3 | 10k | rgb-matrix:R_0805 | R25, R26, R27 |
| 3 | 1uF | rgb-matrix:C_0805 | C4, C9, C14 |
| 3 | 74AC244 | Housings_SSOP:TSSOP-20_4.4x6.5mm_Pitch0.65mm | U1, U2, U3 |
| 2 | 10uF | rgb-matrix:C_0805 | C19, C20 |
| 2 | 1k | rgb-matrix:R_0805 | R28, R29 |
| 2 | 2.2uF | rgb-matrix:C_0805 | C8, C10 |
| 2 | 26pF | rgb-matrix:C_0805 | C2, C3 |
| 1 | 10nF | rgb-matrix:C_0805 | C13 |
| 1 | 3.3V | LEDs:LED_1206 | D1 |
| 1 | 5V | LEDs:LED_1206 | D2 |
| 1 | 8MHz | Crystals:Crystal_SMD_5032_2Pads | X1 |
| 1 | BOOT | Buttons_Switches_SMD:SW_SPST_SKQG | SW2 |
| 1 | CA | rgb-matrix:SMD-solder-bridge-1mm | JP1 |
| 1 | CC | rgb-matrix:SMD-solder-bridge-1mm | JP2 |
| 1 | EAST | Pin_Headers:Pin_Header_Straight_1x03 | P15 |
| 1 | FILTER | rgb-matrix:R_0805 | FB1 |
| 1 | LD3985M33R | TO_SOT_Packages_SMD:SOT-23-5 | U6 |
| 1 | MATRIX_BOT | Socket_Strips:Socket_Strip_Straight_1x16 | P1 |
| 1 | MATRIX_TOP | Socket_Strips:Socket_Strip_Straight_1x16 | P2 |
| 1 | NORTH | Pin_Headers:Pin_Header_Straight_1x03 | P13 |
| 1 | PEAST | Pin_Headers:Pin_Header_Angled_1x07_Pitch2.54mm | P11 |
| 1 | PNORTH | Pin_Headers:Pin_Header_Angled_1x07_Pitch2.54mm | P9 |
| 1 | PSOUTH | Socket_Strips:Socket_Strip_Angled_1x07 | P10 |
| 1 | PWEST | Socket_Strips:Socket_Strip_Angled_1x07 | P8 |
| 1 | RESET | Buttons_Switches_SMD:SW_SPST_SKQG | SW1 |
| 1 | SOUTH | Pin_Headers:Pin_Header_Straight_1x03 | P14 |
| 1 | SPI3 | Pin_Headers:Pin_Header_Straight_1x06 | P4 |
| 1 | STM32F405R | Housings_QFP:TQFP-64_10x10mm_Pitch0.5mm | U5 |
| 1 | SWD | Pin_Headers:Pin_Header_Straight_1x06 | P3 |
| 1 | UART5 | Pin_Headers:Pin_Header_Straight_1x06 | P5 |
| 1 | ULN2803A | Housings_SOIC:SOIC-18W_7.5x11.6mm_Pitch1.27mm | U4 |
| 1 | USBUF01W6 | rgb-matrix:SOT323-6L | U7 |
| 1 | USB_B | Connect:USB_Micro-B | P7 |
| 1 | VEXT | rgb-matrix:BARREL_JACK | CON1 |
| 1 | VEXT | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | P6 |
| 1 | Vbus | rgb-matrix:SMD-solder-bridge-3mm | JP4 |
| 1 | Vext | rgb-matrix:SMD-solder-bridge-3mm | JP3 |
| 1 | WEST | Pin_Headers:Pin_Header_Straight_1x03 | P12 |
The 84 most common of 138 parts.
Questions
How big is the Rgb matrix PCB?
It measures 58 × 58 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Rgb matrix use?
138 parts, built around the STM32F405RGT6, 74AC244PC, LD3985M33R and ULN2803A. 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 Rgb matrix KiCad files?
From the joh/rgb-matrix repository on GitHub, at the commit this page was made from: the board is hardware/rgb-matrix.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Rgb matrix design in my own project?
Its repository states no licence, so its author keeps all rights: ask joh before reusing the design.
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