
Transmitter
will127534/CSI-2-FourLane-HDMI-Extender
A simple MIPI CSI-2 extender with 4-lane support through HDMI cable

GPIO FMC card, Schematics and PCB
Pi hat is an open-source printed circuit board by ApotheoTech, from the ApotheoTech/APT-V01-FMC repository on GitHub. It is a 6-layer board of 89.4 × 69 mm with 132 parts on 224 nets, routed with 1,639 tracks and 355 vias.
It is built around the USB3310C-CP, TPSM82902SISR and TXS0108ERGYR, with the SI52131-A11AGM, APT1608SGC and SSQ-106-02-G-D-RA among its other parts. Its parts include 52 resistors, 45 capacitors, 12 ICs, 5 connectors and 3 diodes.
CopyRight 2023 ApotheoTech

The GPIO board is made mostly for enabling GPIO access to any FMC card connector. It has a Raspberry Pi hat compliant connector, and two PMODs that can be used by PMODs that require two adjacent connectors.
It also has an M.2 Key E connector with a ULPI USB 2.0 interface and 1 PCIe TX and RX connection to support Wifi and Bluetooth.
Navigate up to the repository under example designs (TBD link).
Mostly Debugging and providing Wifi accesses to PetaLinux builds
| Qty | Value | Footprint | References |
|---|---|---|---|
| 32 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C10, C11, C12, C17, C18, C19, C20, C21, C22, C23, C25, C26, C27, C28, C29, C30 +16 |
| 24 | 4.7K | Resistor_SMD:R_0402_1005Metric | R1, R13, R15, R16, R19, R20, R21, R22, R23, R24, R25, R33, R37, R38, R39, R44 +8 |
| 9 | 0 | Resistor_SMD:R_0402_1005Metric | R2, R4, R5, R7, R8, R9, R10, R17, R18 |
| 7 | DNP | Resistor_SMD:R_0402_1005Metric | R3, R11, R12, R14, R36, R50, R54 |
| 7 | TXS0108ERGYR | apotheotech_lib:TI_VQFN_RGY0020A | U3, U5, U6, U7, U8, U9, U10 |
| 5 | 10K | Resistor_SMD:R_0402_1005Metric | R26, R29, R30, R31, R32 |
| 5 | TestPoint | apotheotech_lib:TestPoint | TP1, TP2, TP3, TP4, TP5 |
| 4 | 10uF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C14, C16 |
| 2 | 14pF | Capacitor_SMD:C_0402_1005Metric | C5, C9 |
| 2 | 1uF | Capacitor_SMD:C_0402_1005Metric | C13, C15 |
| 2 | 220 | Resistor_SMD:R_0402_1005Metric | R27, R28 |
| 2 | 22uF | Capacitor_SMD:C_0805_2012Metric | C43, C44 |
| 2 | APT1608SGC | LED_SMD:LED_0603_1608Metric | D2, D3 |
| 2 | Mounting Hole FMC | apotheotech_lib:MountingHole_2.7mm_M2.5_Pad_2.9mm | H1, H2 |
| 2 | SSQ-106-02-G-D-RA | apotheotech_lib:PMOD | J4, J5 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R41 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 1nF | Capacitor_SMD:C_0402_1005Metric | C45 |
| 1 | 2199119-4 | apotheotech_lib:2199119-4 | J2 |
| 1 | 25MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 40.2k | Resistor_SMD:R_0402_1005Metric | R40 |
| 1 | 76.8k | Resistor_SMD:R_0402_1005Metric | R43 |
| 1 | 8.06k | Resistor_SMD:R_0402_1005Metric | R34 |
| 1 | 9774015151R | apotheotech_lib:9774015151R | H3 |
| 1 | ASP-134604-01 | apotheotech_lib:ASP13460401 | J1 |
| 1 | C_2u2_0402 | Capacitor_SMD:C_0402_1005Metric | C24 |
| 1 | DCK0006A_N | apotheotech_lib:SN74AXC1T45DCKR | U1 |
| 1 | ECS-2016MV-240-BN-TR3 | apotheotech_lib:ECS-2016MV | Y2 |
| 1 | GRN LED | apotheotech_lib:D_0402_1005Metric | D1 |
| 1 | R_10k_0402 | Resistor_SMD:R_0402_1005Metric | R35 |
| 1 | SOP65P640X120-8N | apotheotech_lib:M24C64-DRDW8TP_K | IC1 |
| 1 | SYM_ESD_Small | apotheotech_lib:ApotheoTech_Sym | SYM1 |
| 1 | SYM_ESD_Small | Symbol:CE-Logo_8.5x6mm_SilkScreen | SYM4 |
| 1 | SYM_ESD_Small | Symbol:WEEE-Logo_4.2x6mm_SilkScreen | SYM2 |
| 1 | SYM_ESD_Small | Symbol:ESD-Logo_6.6x6mm_SilkScreen | SYM3 |
| 1 | SYM_ESD_Small | apotheotech_lib:UKCA_Logo_8_5mm | SYM5 |
| 1 | Si52131-A11A | apotheotech_lib:Si52131_QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U2 |
| 1 | TPSM82902SISR | apotheotech_lib:TPSM82902SISR | U11 |
| 1 | TSW-120-23-G-D | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical | J3 |
| 1 | USB3310C-CP | apotheotech_lib:Microchip_QFN24_4X4 | U4 |

will127534/CSI-2-FourLane-HDMI-Extender
A simple MIPI CSI-2 extender with 4-lane support through HDMI cable

mikemederos/STM32_PCB
STM32F103C8-based PCB used to calculate 3-phase AC impedance to aid in detection of high-impedance faults.



The-OpenROAD-Project-Attic/SA-PCB
Annealing-based PCB placement tool

tsar-boomba/dap-proto-board-full
The culmination of all of my learning during the Spring '26 semester. All the way from making a simple dev board for the TAD5212 DAC, to making a RP2350 board, and now this. Everything combined on one 6-layer board.

aeremin/firefly_zephyr
Firmware (Zephyr RTOS / nRF Connect SDK, with Pigweed libraries), custom boards and KiCad hardware projects for a few small nRF52-based devices.

It measures 89.4 × 69 mm and has 6 copper layers, 1.6 mm thick.
132 parts, built around the USB3310C-CP, TPSM82902SISR, TXS0108ERGYR and SI52131-A11AGM. 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.
From the ApotheoTech/APT-V01-FMC repository on GitHub, at the commit this page was made from: the board is pi_hat.kicad_pcb and its schematic FMC_Conn.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask ApotheoTech before reusing the design.