4 layers35.5 × 74.5 mm
Room environment monitor
kevinlutzer/room-environment-monitor
An IOT device built of the raspberry pi
57 parts
2 layers45.1 × 43.2 mm
Star Notifier
aayanrahman/Star-NotifierStar-shaped USB-C ESP32-C3 board that lights up when Claude or Cursor is done
- Size
- 45.1 × 43.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 40
- Nets
- 37
- Pads
- 172
- Tracks, vias
- 471, 95
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 25 Oct 2026
- Updated
- 27 Oct 2026
Overview
Star Notifier is an open-source printed circuit board by aayanrahman, from the aayanrahman/Star-Notifier repository on GitHub. It is a 2-layer board of 45.1 × 43.2 mm with 40 parts on 37 nets, routed with 471 tracks and 95 vias.
It is built around the 74AHCT1G125SE, ESP32-C3-WROOM-02-H4 and AP2112K-3.3, with the USBLC6-2SC6 and WS2812B-2020 among its other parts. Its parts include 15 capacitors, 10 diodes, 7 resistors, 4 ICs and 2 switches. It belongs with the ESP32 and RISC-V boards of this library.
Main components
5
74AHCT1G125SE
SOT-353-40℃~+125℃ 1 1 4.5V~5.5V 4.7ns@5V,50pF 40uA 74AHCT 8mA 8mA Schmitt trigger Tri-State Unidirectional SOT-353 Buffers, Drivers, Receivers, Transceivers ROHSDiodes IncorporatedBuffers, Drivers, Receivers, Transceivers
ESP32-C3-WROOM-02-H4
SMD,20x18mm-105dBm -40℃~+105℃ 2.4GHz 20.5dBm 345mA 3V~3.6V 82mA Bluetooth5.0 ESP32-C3 On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,20x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
AP2112K-3.3
SOT253.3V 600mA CMOS Low Dropout Linear Regulator with EnableDiodes IncorporatedUncategorised
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
WS2812B-2020
SMD,2.2x2mm0.6mA 0.84mm 120us 160mcd 200mcd 2kHz 2mm 2mm 300ns 470.4nm 515.6nm 520mcd 5V 622.5nm 800Kbit/s Built-in power-on reset circuit、Built-in power-on reset circuit、Integrated intelligent reverse connection protection function Top-mount SMD,2.2x2mm RGB LEDs(Built-in IC) ROHSWorldsemiRGB LEDs(Built-In IC)
README
README.mdStar Notifier
A small star-shaped USB-C board that lights up when Claude Code or Cursor finishes a task.
- ESP32-C3-WROOM-02 with native USB serial
- 10× WS2812B-2020 LEDs, driven through a 74AHCT1G125 level shifter
- USB-C power (5.1k CC pull-downs, 500 mA polyfuse, USBLC6 ESD), AP2112K 3.3 V regulator
- 0603 passives, 2 layers
Status: schematic done (ERC clean). PCB, firmware and the hook are next.
Made in KiCad 10.
Parts
40| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 100n | Capacitor_SMD:C_0603_1608Metric | C3, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15 |
| 10 | WS2812B-2020 | LED_SMD:LED_WS2812B-2020_PLCC4_2.0x2.0mm | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 |
| 4 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R4, R5, R6 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 33 | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 500mA | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 74AHCT1G125 | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | BOOT | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW2 |
| 1 | ESP32-C3-WROOM-02 | RF_Module:ESP32-C3-WROOM-02 | U3 |
| 1 | HRO TYPE-C-31-M-12 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | RESET | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
Questions
How big is the Star Notifier PCB?
It measures 45.1 × 43.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Star Notifier use?
40 parts, built around the 74AHCT1G125SE, ESP32-C3-WROOM-02-H4, AP2112K-3.3 and USBLC6-2SC6. 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 Star Notifier KiCad files?
From the aayanrahman/Star-Notifier repository on GitHub, at the commit this page was made from: the board is Star-Notifier.kicad_pcb and its schematic Star-Notifier.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Star Notifier design in my own project?
Its repository states no licence, so its author keeps all rights: ask aayanrahman before reusing the design.
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