2 layers99.6 × 43.3 mm
2 layers95 × 95 mm
Betterstarbie
coolcoder96/r-botA little desk companion that reminds you of things on your calendar, makes you move around, and more!
- Size
- 95 × 95 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 23
- Nets
- 40
- Pads
- 105
- Tracks, vias
- 201, 20
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 11 Oct 2026
- Updated
- 24 Oct 2026
Overview
Betterstarbie is an open-source printed circuit board by coolcoder96, from the coolcoder96/r-bot repository on GitHub. It is a 2-layer board of 95 × 95 mm with 23 parts on 40 nets, routed with 201 tracks and 20 vias.
It is built around the 74AHCT1G125SE and WS2812B-2020. Its parts include 7 connectors, 6 capacitors, 5 diodes, 2 ICs and 2 switches. It belongs with the ESP32 boards of this library.
Main components
2
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
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.mdr-bot
The little companion that does some cool things.
This project is a WORK IN PROGRESS! I'm still updating code and case designs.
The Reason I buit this
I wanted to make some sort of device that would help me to keep myself on top of my busy life. I wanted it to be able to remind me of things on my calender and to-do list. I also wanted to put in a few games when I need a break (instead of scrolling lol), this includes using the presence sensor to get me to get up and move around my room.
Parts
The r-bot is made up of:
| Part | Link |
|---|---|
| Seedstudio Xiao ESP32S3 | https://www.aliexpress.com/item/1005005637495945.html |
| HLK-LD2450 | https://www.aliexpress.com/item/4000049991220.html |
| 1.5 Inch 128x128 OLED | https://www.aliexpress.com/item/4000049991220.html |
| 5 WS2812B Leds | https://www.aliexpress.com/item/4001345875756.html |
| ENS160+AHT21 Air Quality And Temperature And Humidity Sensor | https://www.aliexpress.com/item/1005005637495945.html |
Thanks for taking a look!
Other Pics
Original plan:
Upcoming case:
PCB and Schematic pics:
(Autotracer really saved me with this one)
Parts
23| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 100nF | Capacitor_SMD:C_0603_1608Metric | C0, C1, C2, C3, C4, C5 |
| 5 | WS2812B-2020 | LED_SMD:LED_WS2812B-2020_PLCC4_2.0x2.0mm | D1, D2, D3, D4, D5 |
| 2 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J4, J5 |
| 2 | Conn_01x02_Socket | Connector_PinSocket_2.54mm:PinSocket_1x02_P2.54mm_Vertical | J2, J3 |
| 2 | SW_Push | Button_Switch_Keyboard:SW_Cherry_MX_1.00u_PCB | SW1, SW2 |
| 1 | 330Ω | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 74AHCT1G125 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | ENS160+AHT21 | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | J6 |
| 1 | HLK-LD2450 2x4 2.00mm | Connector_PinSocket_2.00mm:PinSocket_2x04_P2.00mm_Vertical | J7 |
| 1 | OLED_SH1107_1.5in | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J1 |
| 1 | XIAO-ESP32-S3-SMD | Seed Studio Library for Kicad:XIAO-ESP32-S3-DIP | U2 |
Questions
How big is the Betterstarbie PCB?
It measures 95 × 95 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Betterstarbie use?
23 parts, built around the 74AHCT1G125SE and WS2812B-2020. 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 Betterstarbie KiCad files?
From the coolcoder96/r-bot repository on GitHub, at the commit this page was made from: the board is pcb/betterstarbie.kicad_pcb and its schematic schematic/betterstarbie.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Betterstarbie design in my own project?
Its repository states no licence, so its author keeps all rights: ask coolcoder96 before reusing the design.
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