2 layers74.5 × 49 mm
EEG
wangq22/ADS1299-BioAmp
ADS1299 BioAmp is an 8-channel biopotential acquisition board designed for research and development of EEG, EMG, ECG, and other low-amplitude bioelectrical signals.
76 parts2
2 layers
Duck pcb
vindognz/QuackOverflowA wirelessly-charged LED rubber duck for debugging. Custom PCB with RGB LEDs and rechargeable battery fits inside a Kmart duck. Charges on a 3D-printed "DEBUGGING IN PROGRESS" stand.
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 16
- Nets
- 32
- Pads
- 105
- Tracks, vias
- 151, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Oct 2025
- Updated
- 29 Oct 2025
Overview
Duck pcb is an open-source printed circuit board by vindognz, from the vindognz/QuackOverflow repository on GitHub. It is a 2-layer board with 16 parts on 32 nets, routed with 151 tracks and 0 vias.
It is built around the ESP32-C3-WROOM-02-H4, TP4056-42-ESOP8 and WS2812B. Its parts include 5 diodes, 4 resistors, 2 capacitors, 2 ICs and 2 connectors. It belongs with the ESP32 and RISC-V boards of this library.
Main components
3
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
TP4056-42-ESOP8
ESOP-8-40℃~+85℃ 1 1A 2uA 4.2V 4V~8V Charging IC Lithium Battery Support ESOP-8 Battery Management ROHSTOPPOWERBattery Management
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
README
README.mdQuackOverflow
A wirelessly-charged LED rubber duck for debugging. Custom PCB with RGB LEDs and rechargeable battery fits inside a Kmart duck. Charges on a 3D-printed "DEBUGGING IN PROGRESS" stand. Because explaining your code to a glowing duck is more fun than regular rubber duck debugging.
Features
- 5x RGB LEDs
- Wireless Qi charging
- Auto-sleep when on charging pad
- Low battery warning (red flash)
- Custom PCB fits inside $2 Kmart duck
Hardware
- ESP32-C3 microcontroller
- WS2812B RGB LEDs
- LiPo battery with Qi charging
- Custom PCB
- 3D printed charging base
The Story
Rubber duck debugging is a real technique where programmers explain their code line-by-line to an inanimate object (traditionally a rubber duck) to help spot bugs. I was gifted this duck as a coding companion for my birthday. I always imagined it glowing for those 2am debugging sessions. This project aims to make that dream a reality.
Parts
16| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | WS2812B | LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D1, D2, D3, D4, D5 |
| 2 | 100nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2 |
| 2 | 5.1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3, R4 |
| 1 | 10kΩ | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1 |
| 1 | 330Ω | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2 |
| 1 | Battery_Cell | Connector_PinHeader_1.00mm:PinHeader_1x02_P1.00mm_Vertical | BT1 |
| 1 | ESP32-C3-WROOM-02 | Espressif:ESP32-C3-WROOM-02 | U3 |
| 1 | Qi_Reciever | Connector_PinHeader_1.00mm:PinHeader_1x02_P1.00mm_Vertical | J1 |
| 1 | TP4056-42-ESOP8 | Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm_ThermalVias | U2 |
| 1 | USB_C_Receptacle_USB2.0_14P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J2 |
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Questions
What parts does the Duck pcb use?
16 parts, built around the ESP32-C3-WROOM-02-H4, TP4056-42-ESOP8 and WS2812B. 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 Duck pcb KiCad files?
From the vindognz/QuackOverflow repository on GitHub, at the commit this page was made from: the board is kicad/duck-pcb/duck_pcb.kicad_pcb and its schematic kicad/base-pcb/base-pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Duck pcb design in my own project?
Its repository states no licence, so its author keeps all rights: ask vindognz before reusing the design.