4 layers100 × 100 mm
2 layers55 × 50 mm
Eggtimer
antonstigemyrhill/eggtimereggtimer for pcb design
- Size
- 55 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 54
- Nets
- 55
- Pads
- 180
- Tracks, vias
- 301, 34
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 8 Jun 2026
- Updated
- 18 Jun 2026
Overview
Eggtimer is an open-source printed circuit board by antonstigemyrhill, from the antonstigemyrhill/eggtimer repository on GitHub. It is a 2-layer board of 55 × 50 mm with 54 parts on 55 nets, routed with 301 tracks and 34 vias.
It is built around the USBLC6-2SC6 and 74HC595. Its parts include 18 resistors, 10 capacitors, 10 diodes, 2 ICs and 1 connector. It belongs with the STM32 boards of this library.
Main components
2
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)
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
README
README.mdeggtimer
eggtimer for pcb design
Parts
54| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 680 | Resistor_SMD:R_0402_1005Metric | R4, R5, R6, R7, R11, R12, R13, R14, R15, R16, R17, R18 |
| 8 | LED yellow | LED_SMD:LED_0805_2012Metric | D1, D2, D3, D4, D5, D6, D7, D8 |
| 4 | 100n | Capacitor_SMD:C_0402_1005Metric | C4, C5, C8, C9 |
| 4 | 1u | Capacitor_SMD:C_0603_1608Metric | C1, C2, C6, C7 |
| 4 | 5k1 | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R10 |
| 4 | M_H | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R8, R9 |
| 2 | 4u7 | Capacitor_SMD:C_0805_2012Metric | C3, C10 |
| 1 | 74HC595 | custom:74HC595D,118 SOIC-16 Shift Registers | 74HC595 |
| 1 | Battery_Cell | custom:screw_terminal_2 | Battery_Cell1 |
| 1 | Buzzer | custom:HND-2319 Buzzer | Buzzer1 |
| 1 | LED G | LED_SMD:LED_0805_2012Metric | D10 |
| 1 | LED r | LED_SMD:LED_0805_2012Metric | D9 |
| 1 | LOGO | LOGO | egg |
| 1 | MCP73831-2-MC | Package_DFN_QFN:DFN-8-1EP_3x2mm_P0.5mm_EP1.7x1.4mm | U2 |
| 1 | Rotary_Encoder | custom:PEC12R-4220F-N0024 encoder | Rotary_Encoder1 |
| 1 | STM32F042F6Px | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | STM32F042F6P6 |
| 1 | SW_Push | custom:TK-6580DS-1 push button | Button |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | nrst-swclk-gnd-swdio-3v3 | Connector_Harwin:Harwin_LTek-Male_05_P2.00mm_Vertical | nrst-swclk-gnd-swdio-3v3 |
| 1 | ~ | Package_TO_SOT_SMD:SOT-89-3 | HT7533-1 |
Questions
How big is the Eggtimer PCB?
It measures 55 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Eggtimer use?
54 parts, built around the USBLC6-2SC6 and 74HC595. 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 Eggtimer KiCad files?
From the antonstigemyrhill/eggtimer repository on GitHub, at the commit this page was made from: the board is KiCAD/eggtimer.kicad_pcb and its schematic KiCAD/eggtimer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Eggtimer design in my own project?
Its repository states no licence, so its author keeps all rights: ask antonstigemyrhill before reusing the design.
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