
AT2XT
cr1901/AT2XT
[Moved to Codeberg] AT to XT Keyboard Protocol Converter firmware + schematic

STM32L431RCT6 prototype board is an open-source printed circuit board by koson, from the koson/STM32L431RCT6_prototype_board repository on GitHub. It is a 4-layer board of 51.6 × 20.3 mm with 31 parts on 58 nets, routed with 304 tracks and 56 vias.
It is built around the SY8089A1AAC, 0603YC104KAT2A and 1210X226M100CT, with the CKCS3015-2.2UH/M, MCR03EZPJ224 and WR06X4992FTL among its other parts. Its parts include 12 capacitors, 7 resistors, 2 ICs, 2 diodes and 2 connectors. It belongs with the STM32 boards of this library.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100nF | Library:C_0603_1608Metric | C3, C4, C5, C6, C7, C8, C10 |
| 3 | 22uF | Library:C_0603_1608Metric | C9, C11, C12 |
| 2 | 10k | Library:R_0603_1608Metric | R2, R3 |
| 2 | 12pF | Library:C_0603_1608Metric | C1, C2 |
| 2 | 330 | Library:R_0603_1608Metric | R6, R7 |
| 2 | RED | Library:LED_0603_1608Metric | LED1, LED2 |
| 1 | 2.2uH/1.5A | Library:L_Neosid_SMS-ME3015 | L1 |
| 1 | 220k | Library:R_0603_1608Metric | R4 |
| 1 | 22R | Library:R_Array_Convex_4x0603 | RN1 |
| 1 | 47R | Library:R_0603_1608Metric | R1 |
| 1 | 49.9k | Library:R_0603_1608Metric | R5 |
| 1 | 8MHz | Library:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | BLM18PG300SN1D | Library:L_0603_1608Metric | FB1 |
| 1 | Conn_02x20_Counter_Clockwise | Library:Socket_DIP-40_15.24mm_Conn | J2 |
| 1 | Fuse | Fuse:Fuse_1812_4532Metric | F1 |
| 1 | RESET | Library:DTSM-6 | S1 |
| 1 | STM32L431CCTx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SWD | Library:PinHeader_2x03_P2.54mm_Vertical_SMD | J1 |
| 1 | SY8089 | Library:SOT-23-5 | U2 |

cr1901/AT2XT
[Moved to Codeberg] AT to XT Keyboard Protocol Converter firmware + schematic

adamvirovecz/sensor-board-voc-temp
VOC, Humidity and Temperature Sensor Board


HW-Lab-Hardware-Design-Agency/WebScreen-PCB
WebScreen PCB designs, BOM and other manufacturing files.

Cadburies/SisuAssistant
Sailing yacht Sisu: Home Assistant + ESPHome Marine Board (alternator regulation, tanks) + MQTT kernel, Signal K/Grafana/InfluxDB on a NAS, and Sisu Nav chart & weather-routing cockpit.

Acidicts/HighSpeedUSBHub
I looked at an old USB 2.0 hub I made and though what if I could make a faster one? So I did(whether it works or not is another story).


thermseekr/esp-relay-8ch
ESP32 based board with 8x 24 VDC inputs and 8x 10A relay outputs.
It measures 51.6 × 20.3 mm and has 4 copper layers, 1.6 mm thick.
31 parts, built around the SY8089A1AAC, 0603YC104KAT2A, 1210X226M100CT and CKCS3015-2.2UH/M. 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 koson/STM32L431RCT6_prototype_board repository on GitHub, at the commit this page was made from: the board is STM32L431RCT6_prototype_board.kicad_pcb and its schematic STM32L431RCT6_prototype_board.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 koson before reusing the design.