2 layers312.5 × 122.3 mm
4 layers310 × 123 mm
75% Keyboard
- Size
- 310 × 123 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 426
- Nets
- 325
- Pads
- 1,831
- Tracks, vias
- 3,617, 1,880
- Pours
- 13
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 6 Feb 2026
- Updated
- 27 Apr 2026
Overview
VLT is an open-source printed circuit board by Charading, from the Charading/VLT repository on GitHub. It is a 4-layer board of 310 × 123 mm with 426 parts on 325 nets, routed with 3,617 tracks and 1,880 vias.
It is built around the MPR121QR2, USB3300-EZK and W25Q128JVSIQ, with the W25Q32JVZPIQ, MSD-1-A and AP2112K-3.3 among its other parts. Its parts include 37 capacitors, 35 resistors, 7 ICs, 7 connectors and 5 diodes. It belongs with the STM32 boards of this library.
Main components
11
MPR121QR2
QFN-20(3x3)-40℃~+85℃ 1.71V~3.6V 12 29uA 2kV 3uA Capacitive Touch QFN-20(3x3) Touch Sensors ROHSNXP SemiconductorsTouch Sensors
USB3300-EZK
QFN-32-EP(5x5)-40℃~+85℃ 3V~3.6V 54.7mA 83uA Controller USB 2.0 QFN-32-EP(5x5) USB Converters ROHSMicrochip TechnologyUSB Converters
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
W25Q32JVZPIQ
WSON-8-EP(5x6)-40℃~+85℃ 100,000 cycles 10uA 133MHz 2.7V~3.6V 20 Years 32Mbit 3ms SPI WSON-8-EP(5x6) NOR FLASH ROHSWinbondNOR FLASH
MSD-1-A
SMD-40℃~+85℃ 2mm 30V Connector and Ejector MicroSD Card (TF Card) Push-Push With Locating Pins SMD SD Card / Memory Card Connector ROHSCUISD Card / Memory Card Connector
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
SK6812
SMD-4P,5.4x5mm-40℃~+85℃ 0.6mA 1.6mm 120° 160mcd~320mcd 1kHz 2000V 280mcd~515mcd 3.7V~5.5V 460nm~470nm 520nm~530nm 620nm~625nm 800Kbit/s 815mcd~1275mcd Built-in power-on reset circuit Semi-transparent lens SMD-4P,5.4x5mm RGB LEDs(Built-in IC) ROHSOPSCO OptoelectronicsRGB LEDs(Built-In IC)
CD74HC4067SM96
SSOP-24-208mil-55℃~+125℃ 15ns 16 16:1 2V~6V 5pF 70Ω 89MHz SSOP-24-208mil Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsBSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
1N4148WT
SOD-523-55℃~+150℃ 1.25V@150mA 100V 150mA 150mW 1uA@75V 2A 4ns Independent SOD-523 Switching Diodes ROHShongjiachengSwitching Diodes
Parts
426| Qty | Value | Footprint | References |
|---|---|---|---|
| 94 | SK6812 | PCM_marbastlib-various:LED_6028R | AMB1, AMB2, AMB3, AMB4, AMB5, AMB6, AMB7, AMB8, AMB9, AMB10, GLO1, GLO2, GLO3, LED1, LED10, LED11 +78 |
| 81 | 0.1u | Mars_Library:C_0402 | CL1, CL2, CL10, CL11, CL12, CL13, CL14, CL15, CL16, CL17, CL18, CL19, CL20, CL21, CL22, CL23 +65 |
| 70 | 49E | PCM_marbastlib-xp-he:SW_MX_HE_90deg_1u_4layer | HE1, HE2, HE10, HE11, HE12, HE13, HE14, HE15, HE16, HE17, HE18, HE19, HE20, HE21, HE22, HE23 +54 |
| 20 | MountingHole_3.1mm | Mars_Library:MountingHole_3.1mm | , , , , , , , , , , , , , , , +4 |
| 19 | 0.1uF | Mars_Library:C_0402 | CA1, CA2, CA3, CA4, CA5, CA6, CA7, CA8, CA9, CA10, CG1, CG2, CG3, MC1, MC2, MC3 +3 |
| 17 | 100nF | Mars_Library:C_0402 | C1, C2, C3, C6, C7, C8, C10, C11, C12, C17, C19, C22, C27, C31, C32, C33 +1 |
| 8 | 22R | Mars_Library:R_0402 | R6, R8, R30, R31, R32, R33, R34, R35 |
| 6 | 100R | Mars_Library:R_0402 | R16, R17, R18, R19, R20, R21 |
| 6 | CD74HC4067SM | Package_SO:SSOP-24_5.3x8.2mm_P0.65mm | M1, M2, M3, M4, M5, M6 |
| 4 | 100nF | Mars_Library:C_0603 | C15, C16, C28, C29 |
| 4 | 10K | Mars_Library:R_0603 | R26, R27, R28, R29 |
| 4 | 20pF | Mars_Library:C_0402 | C4, C5, C18, C21 |
| 4 | 47uF | Capacitor_Tantalum_SMD:CP_EIA-3216-12_Kemet-S | C23, C23, C24, C30 |
| 4 | WS2812_2020 | PCM_marbastlib-various:LED_WS2812_2020 | LED75L1, LED75L2, LED75R1, LED75R2 |
| 4 | WS2812_2020 | sk6805-1515:sk68015-1515 | RING1, RING2, RING3, RING4 |
| 3 | 100K | Mars_Library:R_0603 | R4, R5, R13 |
| 3 | 10K | Mars_Library:R_0402 | R1, R2, R14 |
| 3 | 49E | PCM_marbastlib-xp-he:SW_MX_HE_90deg_1.25u_4layer | HE72, HE73, HE74 |
| 3 | AO3401A | PCM_4ms_Package_SOT:SOT-23 | Q1, Q3, Q5 |
| 3 | Fiducial | Fiducial:Fiducial_0.5mm_Mask1mm | FID1, FID2, FID3 |
| 2 | 10uF | Mars_Library:C_0402 | C35, C36 |
| 2 | 10uF | Mars_Library:C_0603 | C13, C14 |
| 2 | 1uF | Mars_Library:C_0402 | C20, C34 |
| 2 | 2.2K | Mars_Library:R_0402 | R23, R24 |
| 2 | 4.7uF | Mars_Library:C_0402 | C25, C26 |
| 2 | 49E | PCM_marbastlib-xp-he:SW_MX_HE_90deg_2.25u_4layer | HE57, HE59 |
| 2 | 49E | PCM_marbastlib-xp-he:SW_MX_HE_90deg_1.5u_4layer | HE30, HE43 |
| 2 | 49E | PCM_marbastlib-xp-he:SW_MX_HE_90deg_1.75u_4layer | HE45, HE70 |
| 2 | 60R | Mars_Library:Ferrite_0402 | FB2, FB3 |
| 2 | BSS138 | PCM_4ms_Package_SOT:SOT-23 | Q2, Q4 |
| 1 | 0R | Mars_Library:R_0402 | R3 |
| 1 | 100 | Mars_Library:R_0603 | R11 |
| 1 | 10R | Mars_Library:R_0603 | R9 |
| 1 | 10k | Mars_Library:R_0603 | R12 |
| 1 | 12K | Mars_Library:R_0402 | R10 |
| 1 | 1K | Mars_Library:R_0402 | R25 |
| 1 | 1M | Mars_Library:R_0603 | R7 |
| 1 | 1N4148WT | Diode_SMD:D_SOD-523 | D1 |
| 1 | 24MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 25MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y2 |
| 1 | 330 | Mars_Library:R_0603 | R15 |
| 1 | 49E | PCM_marbastlib-xp-he:SW_MX_HE_90deg_2.00u_4layer | HE28 |
| 1 | 49E | PCM_marbastlib-xp-he:SW_MX_HE_90deg_6.25u_4layer | HE75 |
| 1 | 600R | Mars_Library:Ferrite_0805 | FB1 |
| 1 | 75K | Mars_Library:R_0603 | R22 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | BOOT | Mars_Library:TestPoint_Pad_D1.0mm_Minimal | TP4 |
| 1 | BOOT | B3U-1000P:SW_B3U-1000P | S1 |
| 1 | Back | PCM_marbastlib-mx:STAB_MX_2u | S28 |
| 1 | CTP | Mars_Library:XUNPU_FPC-05F-6PH20_1x6-1MP_P0.5mm | J5 |
| 1 | DEBUG | Connector_JST:JST_SH_SM06B-SRSS-TB_1x06-1MP_P1.00mm_Horizontal | J7 |
| 1 | DEBUG | Mars_Library:SWD_Debug_PinHeader_1x05_P2.54mm | J2 |
| 1 | DNP (10K) | Mars_Library:R_0603 | TH1 |
| 1 | Enter | PCM_marbastlib-mx:STAB_MX_2.25u | S57 |
| 1 | GND | Mars_Library:TestPoint_Pad_D1.0mm_Minimal | TP5 |
| 1 | LED_EXP | Connector_JST:JST_GH_SM03B-GHS-TB_1x03-1MP_P1.25mm_Horizontal | J4 |
| 1 | LShift | PCM_marbastlib-mx:STAB_MX_2.25u | S59 |
| 1 | MOMMY | Connector_JST:JST_GH_SM05B-GHS-TB_1x05-1MP_P1.25mm_Horizontal | JST1 |
| 1 | MPR121QR2 | Package_DFN_QFN:UQFN-20_3x3mm_P0.4mm | U4 |
| 1 | MPR_ELE | Mars_Library:XUNPU_FPC-05F-12PH20_1x12-1MP_P0.5mm | J3 |
| 1 | MSD-1-A | MSD-1-A:MSD1A | SD1 |
| 1 | Motor_DC | Mars_Library:Coin_Motor_ERM_10mm | ERM1 |
| 1 | NRST | Mars_Library:TestPoint_Pad_D1.0mm_Minimal | TP3 |
| 1 | RX | Mars_Library:TestPoint_Pad_D1.0mm_Minimal | TP2 |
| 1 | RotaryEncoder_Switch_MP | PCM_4ms_Encoder:RotaryEncoder_Alps_EC11E_Vertical_H20mm_CircularMountingHoles | ENC1 |
| 1 | STM32H723VGTx | Package_QFP:LQFP-100_14x14mm_P0.5mm | U3 |
| 1 | Space | PCM_marbastlib-mx:STAB_MX_6.25u | S75 |
| 1 | TFT | Mars_Library:XUNPU_FPC-05F-8PH20_1x8-1MP_P0.5mm | J1 |
| 1 | TX | Mars_Library:TestPoint_Pad_D1.0mm_Minimal | TP1 |
| 1 | UART | Connector_JST:JST_SH_SM02B-SRSS-TB_1x02-1MP_P1.00mm_Horizontal | J6 |
| 1 | USB3300-EZK | Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm | U5 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U2 |
| 1 | W25Q32JVZP | Package_SON:WSON-8-1EP_6x5mm_P1.27mm_EP3.4x4.3mm | U6 |
| 1 | ~ | Mars_Library:XUNPU_FPC-05F-12PH20_1x12-1MP_P0.5mm | U7 |
The 424 most common of 426 parts.
Questions
How big is the VLT PCB?
It measures 310 × 123 mm and has 4 copper layers, 1.6 mm thick.
What parts does the VLT use?
426 parts, built around the MPR121QR2, USB3300-EZK, W25Q128JVSIQ and W25Q32JVZPIQ. 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 VLT KiCad files?
From the Charading/VLT repository on GitHub, at the commit this page was made from: the board is VLT.kicad_pcb and its schematic VLT.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the VLT design in my own project?
Its repository states no licence, so its author keeps all rights: ask Charading before reusing the design.
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