2 layers99.8 × 49.8 mm
LedArrayDemo
radex/radmatrix
Tiny modular LED matrix. NOTE: Moved to https://code.hackerspace.pl/radex/radmatrix
453 parts2
4 layers50 × 50 mm
Radmatrix
radex/radmatrix2Tiny modular LED matrix. NOTE: Moved to https://code.hackerspace.pl/radex/radmatrix
- Size
- 50 × 50 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 198
- Nets
- 100
- Pads
- 523
- Tracks, vias
- 1,860, 343
- Pours
- 11
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 18 Mar 2024
- Updated
- 26 Jul 2025
Overview
Radmatrix is an open-source printed circuit board by radex, from the radex/radmatrix repository on GitHub. It is a 4-layer board of 50 × 50 mm with 198 parts on 100 nets, routed with 1,860 tracks and 343 vias.
It is built around the RP2040, TJA1050T/CM and W25Q128JVSIQ, with the AMS1117-3.3, CJ431 and H5VL10B among its other parts. Its parts include 62 resistors, 43 capacitors, 28 connectors, 23 diodes and 7 ICs. It belongs with the lEDs and displays boards and the RP2040 boards of this library.
Main components
7
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
TJA1050T/CM
SOP-81Mbps 4.75V~5.25V 50mA CAN Transceiver SOP-8 CAN Transceivers ROHSNXP SemiconductorsCAN Transceivers
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
CJ431
SOT-89-3-25℃~+85℃@(Ta) 100mA 1mA 2.5V~36V 50ppm/℃ Adjustable Parallel ±0.5% SOT-23 Voltage Reference ROHSJiangsu Changjing Electronics Technology (CJ)Voltage Reference
H5VL10B
DFN1006-2L-55℃~+125℃ 1 100nA 10V 15pF 5.6V 50W 5A 5V Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5 DFN1006-2L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
HL2304
SOT-23-55℃~+150℃ 1 N-channel 1.5V 17pF 1W 234pF 3.6A 30V 37mΩ@10V、57mΩ@4.5V 6.08nC@10V N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
README
pcb/MainBoard/README.mdMain Board
50x50mm microcontroller module, driving LedArrayMux modules. Contains an RP2040 microcontroller, a CAN transceiver, PWM audio output, current sensing, and level shifters to work around LedArrayMux bugs.
Revisions
Rev A
Errata:
- Level shifters are too slow to be useful
- Workaround: decrease pullup values to obnoxiously low ones (100-180Ω); do not use level shifters; increase PIO delays until functional
- CAN receive signal is not level shifted, which exposes RP2040 to a 5V signal
- Workaround: Do nothing; replace with a 3v3 CAN transceiver
- The 431 shunt voltage reference does not work correctly
- Workaround: use main 3v3 regulator for vref
- PWM audio signal filter is suspected to be responsible for poor quality audio
Parts
198| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | H5VL10B | led-matrix:DFN1006_TVS | D301, D302, D303, D304, D305, D501, D502, D503, D504, D505, D506, D507, D508, D509, D510, D511 +5 |
| 20 | Conn_01x01 | led-matrix:solder-pad-2.25mm | J501, J502, J503, J504, J505, J506, J507, J508, J509, J510, J511, J512, J513, J514, J515, J516 +4 |
| 14 | 100n | Capacitor_SMD:C_0402_1005Metric | C201, C401, C402, C403, C404, C405, C407, C408, C409, C410, C416, C601, C707, C802 |
| 12 | 10k | Resistor_SMD:R_0603_1608Metric | R201, R202, R203, R204, R205, R206, R211, R212, R213, R214, R215, R216 |
| 12 | 5k1 | Resistor_SMD:R_0402_1005Metric | R103, R104, R301, R302, R501, R507, R508, R510, R512, R513, R515, R711 |
| 12 | SolderJumper_3_Open | led-matrix:SolderJumper-3_Open_RoundedPad_Smol | JP103, JP104, JP501, JP502, JP503, JP504, JP505, JP506, JP507, JP508, JP509, JP701 |
| 11 | 10k | Resistor_SMD:R_0402_1005Metric | R401, R405, R502, R503, R504, R505, R506, R509, R511, R514, R601 |
| 10 | 22u | Capacitor_SMD:C_0805_2012Metric | C105, C106, C202, C418, C501, C504, C505, C703, C706, C708 |
| 7 | 1u | Capacitor_SMD:C_0402_1005Metric | C101, C102, C103, C104, C411, C412, C413 |
| 7 | HL2304 | Package_TO_SOT_SMD:SOT-23 | Q501, Q502, Q503, Q504, Q505, Q506, Q507 |
| 5 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP701, TP702, TP703, TP705, TP707 |
| 4 | 1k | Resistor_SMD:R_0402_1005Metric | R101, R102, R404, R701 |
| 4 | 33R | Resistor_SMD:R_0402_1005Metric | R207, R208, R209, R210 |
| 4 | 4u7 | Capacitor_SMD:C_0805_2012Metric | C701, C702, C711, C712 |
| 4 | JLCToolingHole | led-matrix:jlcpcb-tooling-hole | H501, H502, H503, H504 |
| 3 | 100mΩ | Resistor_SMD:R_1206_3216Metric | R702, R703, R704 |
| 3 | 1k8 | Resistor_SMD:R_0603_1608Metric | R105, R106, R803 |
| 3 | Mechanical | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J102, J103, J104 |
| 3 | SolderJumper_2_Open | led-matrix:SolderJumper-2_Open_RoundedPad_Smol | JP101, JP102, JP601 |
| 2 | 27R | Resistor_SMD:R_0603_1608Metric | R402, R403 |
| 2 | 2k | Resistor_SMD:R_0402_1005Metric | R709, R712 |
| 2 | 33p | Capacitor_SMD:C_0402_1005Metric | C414, C415 |
| 2 | 470R | Resistor_SMD:R_0603_1608Metric | R706, R710 |
| 2 | 680R | Resistor_SMD:R_0402_1005Metric | R707, R708 |
| 2 | LED | Diode_SMD:D_0603_1608Metric | D701, D702 |
| 2 | SW | led-matrix:HY-C-03 | SW101, SW102 |
| 1 | 0R | Resistor_SMD:R_0603_1608Metric | R303 |
| 1 | 100R | Resistor_SMD:R_0402_1005Metric | R802 |
| 1 | 100p | Capacitor_SMD:C_0402_1005Metric | C714 |
| 1 | 100u | Capacitor_SMD:C_1206_3216Metric | C713 |
| 1 | 100u | Capacitor_SMD:CP_Elec_6.3x7.7 | C705 |
| 1 | 100u | Capacitor_Tantalum_SMD:CP_EIA-3528-15_AVX-H | C503 |
| 1 | 120R | Resistor_SMD:R_0402_1005Metric | R602 |
| 1 | 12MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | X401 |
| 1 | 1k5 | Resistor_SMD:R_0402_1005Metric | R705 |
| 1 | 220R | Resistor_SMD:R_0603_1608Metric | R801 |
| 1 | 470u | Capacitor_SMD:CP_Elec_8x10.5 | C502 |
| 1 | 47u | Capacitor_SMD:C_0805_2012Metric | C801 |
| 1 | 6V 3A 50A 6A | Fuse:Fuse_1210_3225Metric_Pad1.42x2.65mm_HandSolder | F701 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U701 |
| 1 | AudioJack3_Ground | led-matrix:3.5mm-audio-jack | J801 |
| 1 | CANConn | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J601 |
| 1 | CJ431 | Package_TO_SOT_SMD:SOT-23 | U704 |
| 1 | DaughterConn | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | J101 |
| 1 | DebugConn | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Horizontal | J105 |
| 1 | INA180A1 | Package_TO_SOT_SMD:SOT-23-5 | U702 |
| 1 | RP2040 | led-matrix:RP2040-QFN-56 | U401 |
| 1 | SHOU HAN TF PUSH | led-matrix:micro-sd-tf-push | U201 |
| 1 | TJA1050T | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U601 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J301 |
| 1 | W25Q128JVSIQ | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U402 |
Questions
How big is the Radmatrix PCB?
It measures 50 × 50 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Radmatrix use?
198 parts, built around the RP2040, TJA1050T/CM, W25Q128JVSIQ and AMS1117-3.3. 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 Radmatrix KiCad files?
From the radex/radmatrix repository on GitHub, at the commit this page was made from: the board is pcb/MainBoard/MainBoard.kicad_pcb and its schematic pcb/DemoBoard1/LedArrayDemo.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Radmatrix design in my own project?
Its repository states no licence, so its author keeps all rights: ask radex before reusing the design.
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