4 layers41.4 × 27.9 mm
Imu geolocator
gabrielpgagne/imu-geolocator-hw
An experimental project about trying to use an IMU as a geolocalization device.
34 partsGPL-3.0
4 layers65 × 30 mm
Composite vr
alanbog/Composite-VR-PCBController board for CRT-based VR headset
- Size
- 65 × 30 mm
- Copper layers
- 4
- Thickness
- 1.59 mm
- Parts
- 208
- Nets
- 277
- Pads
- 883
- Tracks, vias
- 1,651, 283
- Pours
- 1,161
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 29 Jun 2026
- Updated
- 29 Jun 2026
Overview
Composite vr is an open-source printed circuit board by alanbog, from the alanbog/Composite-VR-PCB repository on GitHub, published under the CERN-OHL-P-2.0 licence. It is a 4-layer board of 65 × 30 mm with 208 parts on 277 nets, routed with 1,651 tracks and 283 vias.
It is built around the RP2040, NC7SZ125P5X and TLV62568PDDCR, with the AK09918C, USB2422/MJ and TXS0102DCU among its other parts. Its parts include 102 resistors, 70 capacitors, 16 ICs, 6 connectors and 3 diodes. It belongs with the RP2040 and FPGA and CPLD boards of this library.
Main components
8
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
NC7SZ125P5X
SC-70-5-40℃~+85℃ 1 1 1.65V~5.5V 2.1ns@5V,50pF 20uA 32mA 32mA 7SZ Tri-State Unidirectional SC-70-5 Buffers, Drivers, Receivers, Transceivers ROHSonsemiBuffers, Drivers, Receivers, Transceivers
TLV62568PDDCR
SOT-23-THIN-6-40℃~+125℃@(TJ) 1 1.5MHz 1A 2.5V~5.5V 35uA 600mV~5.5V Adjustable Buck Buck Built-in Yes SOT-23-THIN-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
AK09918C
WLCSP-4(0.8x0.8)-30℃~+85℃ 1.1mA 1.65V~1.95V 16bit I2C ±4.912mT ±4.912mT WLCSP-4(0.8x0.8) 3D Magnetic Sensors ROHSAsahi Kasei Microdevices3D Magnetic Sensors
USB2422/MJ
QFN-24-EP(4x4)2 3.3V Hub USB 2.0 QFN-24-EP(4x4) USB HUB Controllers ROHSMicrochip TechnologyUSB Converters
TXS0102DCU
TSSOP82-Bit Bidirectionnal Voltage-Level Translator for Open-Drain and Push-Pull ApplicationsTexas InstrumentsUncategorised
MPU-6050
QFN-24-EP(4x4)-40℃~+85℃ 16bit 1KB 2.375V~3.46V 5uA Accelerometer Gyroscope I2C X,Y,Z X,Y,Z ±16g ±2000dps QFN-24-EP(4x4) Accelerometers ROHSTDK InvenSenseAccelerometers
TPS2561DRC
VSON-10-EP(3x3)-40℃~+125℃ 2 2.5V~6.5V 2.8A 44mΩ Active High High Side Switch Overcurrent Protection(OCP)、Over Temperature Protection VSON-10-EP(3x3) Power Distribution Switches ROHSTexas InstrumentsPower Distribution Switches
README
README.mdComposite-VR-PCB
This repository contains the hardware design of a controller board for CRT-based VR headset. The circuit contains an AMD Spartan 7 FPGA which splits the incoming HDMI video into separate luma only (black-and-white) NTSC composite video signals for the left and right eye. It also contains an RP2040 microcontroller which serves two purposes:
- Act as a JTAG programmer for the FPGA using xvc-pico
- Transmit 3-DOF tracking data back to a PC using the on-board IMU (based on Relativty).
The board also contains a USB hub and a USB C port intended to be connected to a Vive Tracker. When a Vive tracker is connected and SteamVR settings are configured to use the Vive Tracker to override the default tracking, the onboard IMU tracking will not be used, and the RP2040 will only serve to let SteamVR know that the headset is connected.
The board is the same dimensions and has the same mounting hole placement as a Raspberry Pi Zero.
Parts
208| Qty | Value | Footprint | References |
|---|---|---|---|
| 27 | 100n | PCM_JLCPCB:C_0402 | C1, C2, C10, C11, C14, C15, C16, C17, C19, C21, C24, C25, C27, C29, C30, C34 +11 |
| 18 | 15K | PCM_JLCPCB:R_0402 | R42, R45, R46, R47, R48, R50, R53, R59, R63, R75, R79, R82, R84, R85, R86, R87 +2 |
| 14 | 7.5K | PCM_JLCPCB:R_0402 | R38, R39, R40, R41, R51, R58, R62, R72, R81, R83, R89, R90, R91, R92 |
| 12 | 470n | PCM_JLCPCB:C_0402 | C46, C47, C48, C50, C54, C55, C57, C60, C62, C63, C64, C66 |
| 11 | 4.7K | PCM_JLCPCB:R_0402 | R43, R44, R49, R54, R55, R67, R68, R69, R70, R77, R96 |
| 10 | 0 | PCM_JLCPCB:R_0402 | R1, R5, R15, R23, R26, R27, R64, R66, R76, R80 |
| 10 | 4u7 | PCM_JLCPCB:C_0402 | C12, C18, C26, C36, C39, C43, C44, C49, C51, C52 |
| 8 | 100K | PCM_JLCPCB:R_0402 | R17, R33, R35, R36, R37, R100, R101, R102 |
| 8 | 49.9 | PCM_JLCPCB:R_0402 | R3, R7, R9, R13, R14, R16, R24, R25 |
| 5 | 2.2K | PCM_JLCPCB:R_0402 | R2, R4, R19, R20, R22 |
| 5 | 47u | PCM_JLCPCB:C_0805 | C38, C53, C61, C65, C68 |
| 4 | 10u | PCM_JLCPCB:C_0603 | C4, C13, C20, C67 |
| 4 | 15p | PCM_JLCPCB:C_0402 | C3, C5, C28, C33 |
| 4 | 1u | PCM_JLCPCB:C_0402 | C22, C23, C31, C32 |
| 4 | 22K | PCM_JLCPCB:R_0402 | R11, R31, R32, R94 |
| 4 | 75 | PCM_JLCPCB:R_0402 | R52, R56, R57, R65 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.7mm_M2.5_DIN965_Pad | H1, H2, H3, H4 |
| 3 | 100u | PCM_JLCPCB:C_1206 | C37, C45, C69 |
| 3 | 1K | PCM_JLCPCB:R_0402 | R8, R12, R21 |
| 3 | 200K | PCM_JLCPCB:R_0402 | R18, R74, R93 |
| 3 | 2u2 | Inductor_SMD:L_Taiyo-Yuden_MD-3030 | L1, L2, L3 |
| 3 | Red LED | LED_SMD:LED_0603_1608Metric | D1, D2, D3 |
| 3 | TLV62568PDDCR | Library:SOT-23-6-small_courtyard | U5, U9, U10 |
| 2 | 10K | PCM_JLCPCB:R_0402 | R6, R78 |
| 2 | 18K | PCM_JLCPCB:R_0402 | R61, R73 |
| 2 | 22 | PCM_JLCPCB:R_0402 | R29, R30 |
| 2 | 33K | PCM_JLCPCB:R_0402 | R10, R34 |
| 2 | 5.1K | PCM_JLCPCB:R_0402 | R28, R98 |
| 2 | 8.2K | PCM_JLCPCB:R_0402 | R60, R71 |
| 2 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1, J2 |
| 2 | IS25LP016D | Package_SO:SO-8_3.9x4.9mm_P1.27mm | U2, U6 |
| 2 | OPA358 | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U13, U15 |
| 2 | TXS0102DCU | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U14, U16 |
| 2 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_Molex_105450-0101 | J3, J5 |
| 1 | 12K | PCM_JLCPCB:R_0402 | R99 |
| 1 | 12MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y2 |
| 1 | 2.2n | PCM_JLCPCB:C_0402 | C6 |
| 1 | 24MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y3 |
| 1 | 330 | PCM_JLCPCB:R_0402 | R95 |
| 1 | 50MHz | Oscillator:Oscillator_SMD_SiT_PQFN-4Pin_3.2x2.5mm | Y1 |
| 1 | AK09918C | Package_BGA:WLP-4_0.83x0.83mm_P0.4mm | U1 |
| 1 | Conn_02x07_Odd_Even | Connector_PinHeader_2.00mm:PinHeader_2x07_P2.00mm_Vertical_SMD | J6 |
| 1 | HDMI_A | Connector_Video:HDMI_A_Molex_208658-1001_Horizontal | J4 |
| 1 | MPU-6050 | Sensor_Motion:InvenSense_QFN-24_4x4mm_P0.5mm | U4 |
| 1 | NC7SZ125P5X | Package_TO_SOT_SMD:SOT-353_SC-70-5 | U7 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U8 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_TS-1088-xR025 | SW1 |
| 1 | TPS2561 | Package_SON:VSON-10-1EP_3x3mm_P0.5mm_EP1.65x2.4mm_ThermalVias | U11 |
| 1 | USB2422 | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.5x2.5mm | U12 |
| 1 | xc7s15ftgb196 | Package_BGA:Xilinx_FTGB196 | U3 |
Questions
How big is the Composite vr PCB?
It measures 65 × 30 mm and has 4 copper layers, 1.59 mm thick.
What parts does the Composite vr use?
208 parts, built around the RP2040, NC7SZ125P5X, TLV62568PDDCR and AK09918C. 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 Composite vr KiCad files?
From the alanbog/Composite-VR-PCB repository on GitHub, at the commit this page was made from: the board is KiCad Files/composite_vr.kicad_pcb and its schematic KiCad Files/composite_vr.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Composite vr design in my own project?
Its repository publishes it under the CERN-OHL-P-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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