2 layers
Hacky holidays
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
42 parts915
2 layers5 × 99.7 mm
Hacky holidays
grimsteel/pixel-clockClock shaped pcb with neopixels + buzzer
- Size
- 5 × 99.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 50
- Pads
- 153
- Tracks, vias
- 383, 27
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241129)
- Created
- 28 Dec 2024
- Updated
- 28 Oct 2026
Overview
Hacky holidays is an open-source printed circuit board by grimsteel, from the grimsteel/pixel-clock repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 5 × 99.7 mm with 45 parts on 50 nets, routed with 383 tracks and 27 vias.
It is built around the CH552G, DW01A and TP4057, with the WS2812B, AO3400A and 1N5819WS among its other parts. Its parts include 11 diodes, 10 resistors, 7 capacitors, 4 switches and 3 ICs. It belongs with the lEDs and displays boards and the 8051 (CH55x, STC, AT89) boards of this library.
Main components
9
CH552G
SOP-1616KB 24MHz 3.3V~5V 51 Family 8bit FLASH SOP-16 Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)
DW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery ManagementTP4057
SOT-23-6-40℃~+85℃ 1 25uA 4.24V 4V~6.5V Charging IC Lithium Battery Not supported SOT-23-6 Battery Management ROHSTECH PUBLICBattery Management
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky DiodesAO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
P6SMB6.8CA
SMB10.5V 1mA 5.8V 57.1A 6.45V 600W@10/1000us Bidirectional IEC 61000-4-2、IEC 61000-4-4 TVS SMB ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
UC09-0B16F00P11
SMDUSB ConnectorsBXCONN
README
README.mdThe Pixel Clock
A clock-shaped PCB with 8 Neopixels and a buzzer. Built on a CH552 MCU. Powered by two rechargeable LIR2032s.
Although this cannot actually be used as a clock, it can be used to play songs, with the neopixels flashing in sync.
Firmware using ch554_sdcc is in the firmware directory.
Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | WS2812B | lcsc-imports:LED-SMD_4P-L1.6-W1.5_XL-1615RGBC-WS2812B | D1, D2, D4, D5, D7, D8 |
| 4 | 100 nF | Capacitor_SMD:C_0603_1608Metric | C2, C4, C5, C7 |
| 2 | 10 uF | Capacitor_SMD:C_0603_1608Metric | C1, C6 |
| 2 | 1K | Resistor_SMD:R_0402_1005Metric | R2, R11 |
| 2 | 5.1K | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q2, Q3 |
| 2 | Battery_Cell | Battery:BatteryHolder_MYOUNG_BS-07-A1BJ001_CR2032 | BT3, BT9 |
| 2 | SW_Push | Button_Switch_THT:SW_PUSH-12mm | SW2, SW3 |
| 1 | 1 uF | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | 100 | Resistor_SMD:R_1206_3216Metric | R10 |
| 1 | 100K | Resistor_SMD:R_0402_1005Metric | R8 |
| 1 | 10K | Resistor_SMD:R_0805_2012Metric | R9 |
| 1 | 1N5819WS | Diode_SMD:D_SOD-323 | D6 |
| 1 | 220 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 27K | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 330 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_12x9.5RM7.6 | BZ6 |
| 1 | CH552G | Package_SO:STC_SOP-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | D10 | lcsc-imports:LED-SMD_4P-L1.6-W1.5_XL-1615RGBC-WS2812B | D10 |
| 1 | D11 | lcsc-imports:LED-SMD_4P-L1.6-W1.5_XL-1615RGBC-WS2812B | D11 |
| 1 | DW01A | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | LED | LED_SMD:LED_0805_2012Metric | D9 |
| 1 | P6SMB6.8CA | Diode_SMD:D_SMB | D3 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_XKB_TS-1187A | SW1 |
| 1 | SW_SPDT | lcsc-imports:SW-TH_K3-1260D-L1 | SW4 |
| 1 | TP4057 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | UC09-0B16F00P11 | lcsc-imports:USB-C_UC09-0B16F00P11 | USB1 |
| 1 | https://github.com/grimsteel/pixel-clock | custom-footprints:qrcode | QR***** |
The 44 most common of 45 parts.
Questions
How big is the Hacky holidays PCB?
It measures 5 × 99.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Hacky holidays use?
45 parts, built around the CH552G, DW01A, TP4057 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 Hacky holidays KiCad files?
From the grimsteel/pixel-clock repository on GitHub, at the commit this page was made from: the board is hacky-holidays.kicad_pcb and its schematic hacky-holidays.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Hacky holidays design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
Similar boards
- 4 layers140 × 100 mm
Dc usv
TobleMiner/DC-UPS
A small DC UPS, designed to keep small appliances like consumer network equipment running during power outages
351 parts223CERN-OHL-P-2.0 - 4 layers190 × 110 mm
- 2 layers107 × 64 mm
- 4 layers69.5 × 62.6 mm
Sensors Module
Queens-Rocket-Engineering-Team/Avionics-23-26
QRET Avionics hardware, firmware, and documentation for 2023 to 2025.
197 parts4 - 2 layers141.6 × 70 mm
- 4 layers100 × 77.4 mm
- 2 layers
