2 layers133.4 × 117.1 mm
2 layers133.4 × 102 mm
RefleXion Grid
TweetyDaBird/RefleXion-GridMinimal footprint Split Ortho Keyboard with RP2040 MCU and USB link
- Size
- 133.4 × 102 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 185
- Nets
- 152
- Pads
- 1,133
- Tracks, vias
- 2,967, 519
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Jan 2026
- Updated
- 15 Jan 2026
Overview
RefleXion Grid is an open-source printed circuit board by TweetyDaBird, from the TweetyDaBird/RefleXion-Grid repository on GitHub. It is a 2-layer board of 133.4 × 102 mm with 185 parts on 152 nets, routed with 2,967 tracks and 519 vias.
It is built around the RP2040, SN74LV1T34DBV and W25Q32JVUUIQ, with the SPX3819M5-L-3-3/TR, SRV05-4 and SK6812MINI-E among its other parts. Its parts include 75 diodes, 37 switches, 16 capacitors, 11 resistors and 5 ICs. It belongs with the RP2040 boards of this library.
Main components
10
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
SN74LV1T34DBV
SOT-23-5-40℃~+125℃ 1 1 1.6V~5.5V 10uA 5.5ns@5V,15pF 74LV 8mA 8mA Level shifting Push-pull Unidirectional SOT-23-5 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsBuffers, Drivers, Receivers, Transceivers
W25Q32JVUUIQ
USON-8(3x4)-40℃~+85℃ 100,000 cycles 10uA 133MHz 2.7V~3.6V 20 Years 32Mbit Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI USON-8(3x4) NOR FLASH ROHSWinbond ElecNOR FLASHSPX3819M5-L-3-3/TR
SOT-23-5-40℃~+125℃ 1 16V 3.3V 340mV@(500mA) 40uVrms 500mA 70dB 90uA Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMaxLinearVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SRV05-4
SOT-23-6L-55℃~+150℃ 15V 1pF 4A 5V 5uA 6V 80W ESD Four channels IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
SK6812MINI-E
SMD-40℃~+85℃ 0.6mA 1.78mm 120mcd~240mcd 120° 160mcd~320mcd 1kHz 2.8mm 2000V 3.2mm 3.7V~5.5V 460nm~470nm 515nm~525nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Semi-transparent lens SMD RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky Diodes
CF06V5TR50
0603-20℃~+105℃ 0.005 0.8mm 1.6mm 500mA 50A 50V Surface Mount Fuse 0603 Disposable fuses ROHSTA-I TechDisposable Fuses
TXM12M0004252LBCEO00T
SMD2520-4P-40℃~+85℃ 120Ω 12MHz 20pF Crystal Oscillator ±10ppm ±30ppm SMD2520-4P Crystals ROHSYajingxinCrystals
README
README.mdRefleXion
Ortho Split Keyboard
This is a joint project with concept by 'The Reflex' (Pedro Quaresma), and design by 'TweetyDaBird' (Markus Knutsson).
Parts
185| Qty | Value | Footprint | References |
|---|---|---|---|
| 40 | SK6812MINI-E | Keyboard RGB:MX_SK6812MINI-E_REVERSIBLE_SMALL_PAD | LED1, LED2, LED10, LED11, LED12, LED13, LED14, LED15, LED16, LED17, LED18, LED19, LED20, LED21, LED22, LED23 +24 |
| 35 | 1N4148W | Diode_SMD:D_SOD-123 | D1, D2, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19, D20, D21, D22, D23 +19 |
| 31 | SW_Push | Keyboard Switches:SW_MX_HotSwap_Reversible | SW1, SW2, SW10, SW11, SW12, SW13, SW14, SW15, SW16, SW17, SW18, SW19, SW20, SW21, SW22, SW23 +15 |
| 15 | Jumper_2_Open | Keyboard Common:Jumper_min_v2 | JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8, JP9, JP10, JP12, JP13, JP14, JP15, JP16 |
| 10 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C5, C9, C10, C11, C12, C13, C15, C16 |
| 9 | Spacer_PCB | Keyboard Common:Spacer PCB hole | H1, H2, H3, H4, H5, H6, H7, H8, H9 |
| 6 | SW_Push | Keyboard Switches:SW_MX_HotSwap_Reversible_Encoder | SW6, SW7, SW27, SW28, SW34, SW35 |
| 4 | 1uF | Capacitor_SMD:C_0402_1005Metric | C3, C4, C8, C14 |
| 4 | BLM18SG700TZ1D | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | FB1, FB2, FB3, FB4 |
| 3 | 10K | Resistor_SMD:R_0402_1005Metric | R1, R6, R11 |
| 3 | 68K | Resistor_SMD:R_0402_1005Metric | R5, R8, R9 |
| 2 | 27R | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | 30pF | Capacitor_SMD:C_0402_1005Metric | C6, C7 |
| 2 | 5.1K | Resistor_SMD:R_0402_1005Metric | R4, R7 |
| 2 | Stabilizer_2u_MX | Keyboard Stabilizer:Stabilizer_Cherry_MX_2.00u | ST1, ST2 |
| 1 | 1K | Resistor_SMD:R_0402_1005Metric | R10 |
| 1 | 1N5819WS | Diode_SMD:D_SOD-323F | ZD1 |
| 1 | CC-BY-SA-4.0 | Logotypes:CC_BY_SA_40_line | Logo3 |
| 1 | CF06V5TR50 | Resistor_SMD:R_0603_1608Metric | F1 |
| 1 | Jumper_3_Open | Keyboard Common:SolderJumper-3_open_mini | JP11 |
| 1 | OLED_4pin | Keyboard Common:OLED_SSD1306_128x32_0_91_inch | OLED1 |
| 1 | QMK_Logo | Logotypes:Powered_by_QMK | Logo2 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm_ThermalVias | U4 |
| 1 | RoHS_Logo | Logotypes:RoHs | Logo1 |
| 1 | SN74LV1T34DBV | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | SPX3819M5-L-3-3/TR | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6 | U5 |
| 1 | TXM12M0004252LBCEO00T | Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm | Y1 |
| 1 | USB_C_Receptacle_USB2.0 | Keyboard Common:HRO_TYPE-C-31-M-12_double_sided_serial link | J2 |
| 1 | USB_C_Receptacle_USB2.0 | Keyboard Common:HRO_TYPE-C-31-M-12_double_sided | J1 |
| 1 | W25Q32JVUUIQ | Keyboard Common:USON-8_4x3mm_P0.8mm | U3 |
| 1 | YTSA010 | Keyboard Common:YTS-A002 Double-sided | RES1 |
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Questions
How big is the RefleXion Grid PCB?
It measures 133.4 × 102 mm and has 2 copper layers, 1.6 mm thick.
What parts does the RefleXion Grid use?
185 parts, built around the RP2040, SN74LV1T34DBV, W25Q32JVUUIQ and SPX3819M5-L-3-3/TR. 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 RefleXion Grid KiCad files?
From the TweetyDaBird/RefleXion-Grid repository on GitHub, at the commit this page was made from: the board is RefleXion Grid - PCB/RefleXion Grid.kicad_pcb and its schematic RefleXion Grid - PCB/RefleXion Grid.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the RefleXion Grid design in my own project?
Its repository states no licence, so its author keeps all rights: ask TweetyDaBird before reusing the design.