2 layers100 × 100 mm
2 layers90 × 80 mm
Unix clock improved
derenrich/unix-clockkicad project for a LED unix clock board
- Size
- 90 × 80 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 100
- Pads
- 233
- Tracks, vias
- 329, 15
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 10 May 2025
- Updated
- 10 May 2025
Overview
Unix clock improved is an open-source printed circuit board by derenrich, from the derenrich/unix-clock repository on GitHub. It is a 2-layer board of 90 × 80 mm with 25 parts on 100 nets, routed with 329 tracks and 15 vias.
It is built around the IS31FL3236A-QFLS2-TR, DS3231MZ/V+ and BK-912-TR. Its parts include 6 connectors, 4 capacitors, 3 resistors, 3 ICs and 1 diode. It belongs with the lEDs and displays boards and the RP2040 boards of this library.
Main components
3
IS31FL3236A-QFLS2-TR
QFN-44-EP(5x5)-40℃~+85℃ 2.7V~5.5V 38mA 400kHz 9mA I²C PWM dimming、Internal reset function QFN-44-EP(5x5) Digital Tube Drivers ROHSISSIDigital Tube Drivers
DS3231MZ/V+
SOIC-8-40℃~+85℃ 2.3V~5.5V Built-in I2C Temperature compensation、Backup power management and battery charging、Alarm function、Locking and tamper-proof、Periodic interrupt output SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
BK-912-TR
-- Button And Strip Battery Connector ROHSMPDButton And Strip Battery Connector
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | Conn_01x16_Pin | Connector_PinHeader_2.54mm:PinHeader_1x16_P2.54mm_Vertical | J1, J2, J3, J4 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.5mm_Pad | H1, H2, H3, H4 |
| 3 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C4 |
| 2 | 4.7k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 1 | 1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 2.5k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3 |
| 1 | BK-912-TR | Personal:BK-912-TR_MPD | B1 |
| 1 | DS3231MZ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | IS31FL3236A-QFLS2-TR | Package_DFN_QFN:QFN40P500X500X80-45N | U3 |
| 1 | LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1 |
| 1 | LOGO | Personal:de-logo-small | G*** |
| 1 | Pico | Personal:RPi_Pico_SMD_TH | U1 |
| 1 | RESET | Button_Switch_THT:SW_TH_Tactile_Omron_B3F-10xx | SW1 |
| 1 | RGB | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J6 |
| 1 | UART | Connector_JST:JST_SH_BM03B-SRSS-TB_1x03-1MP_P1.00mm_Vertical | J5 |
The 24 most common of 25 parts.
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Questions
How big is the Unix clock improved PCB?
It measures 90 × 80 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Unix clock improved use?
25 parts, built around the IS31FL3236A-QFLS2-TR, DS3231MZ/V+ and BK-912-TR. 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 Unix clock improved KiCad files?
From the derenrich/unix-clock repository on GitHub, at the commit this page was made from: the board is unix-clock-improved/unix-clock-improved.kicad_pcb and its schematic unix-clock-improved/unix-clock-improved.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Unix clock improved design in my own project?
Its repository states no licence, so its author keeps all rights: ask derenrich before reusing the design.