2 layers100 × 90 mm
2 layers63 × 13 mm
- Size
- 63 × 13 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 26
- Nets
- 37
- Pads
- 98
- Tracks, vias
- 316, 75
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 5 Jul 2023
- Updated
- 27 Oct 2026
Overview
Clk is an open-source printed circuit board by McbeEringi, from the McbeEringi/pcb-stuff repository on GitHub, published under the MIT licence. It is a 2-layer board of 63 × 13 mm with 26 parts on 37 nets, routed with 316 tracks and 75 vias.
It is built around the ATTINY402-SSN, 74HC595 and LTC-4627JG. Its parts include 12 resistors, 4 ICs, 3 capacitors, 2 connectors and 2 switches. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATTINY402-SSN
SOIC-8-40℃~+105℃ 1.8V~5.5V 10bit 128Byte 20MHz 256Byte 4KB 6 8 Bit AVR Built-in FLASH SOIC-8 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
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
LTC-4627JG
DIP-16DIP-16 LED Segment Displays ROHSLite-OnLED Segment Displays
Parts
26| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 1k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R7, R8 |
| 2 | 74HC595 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U2, U3 |
| 2 | R_I2C | Resistor_SMD:R_0603_1608Metric | R11, R12 |
| 2 | SW_Push | Library:alps-skrg | SW1, SW2 |
| 1 | Library:PCB.MCBEERINGI.DEV_small | ||
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C3 |
| 1 | ATtiny402-SS | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | Buzzer | Buzzer_Beeper:Buzzer_TDK_PS1240P02BT_D12.2mm_H6.5mm | BZ1 |
| 1 | C_RCLK | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | C_SER | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2 |
| 1 | LOGO | LOGO | G*** |
| 1 | LTC-4627JG | Display_7Segment:LTC-4627Jx | U1 |
| 1 | R_RCLK | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | R_SER | Resistor_SMD:R_0603_1608Metric | R10 |
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Questions
How big is the Clk PCB?
It measures 63 × 13 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Clk use?
26 parts, built around the ATTINY402-SSN, 74HC595 and LTC-4627JG. 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 Clk KiCad files?
From the McbeEringi/pcb-stuff repository on GitHub, at the commit this page was made from: the board is proj/light/7seg/clk/clk.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Clk design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).