2 layers139.7 × 48.3 mm
SuperClockMatrix
silicagel777/SuperClock
A DIY desk clock with retro-style dot matrix display
106 partsMIT
2 layers139.7 × 48.3 mm
SuperClockController
silicagel777/SuperClockA DIY desk clock with retro-style dot matrix display
- Size
- 139.7 × 48.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 82
- Nets
- 74
- Pads
- 318
- Tracks, vias
- 495, 97
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Apr 2025
- Updated
- 20 May 2026
Overview
SuperClockController is an open-source printed circuit board by silicagel777, from the silicagel777/SuperClock repository on GitHub, published under the MIT licence. It is a 2-layer board of 139.7 × 48.3 mm with 82 parts on 74 nets, routed with 495 tracks and 97 vias.
It is built around the ATMEGA32A-AU, DS1307ZN and DS3231SN#T&R, with the 2N7002K, 1N5819WS and CR2032 among its other parts. Its parts include 31 resistors, 18 transistors, 11 capacitors, 6 connectors and 3 ICs. It belongs with the lEDs and displays and retro computing and games boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
7
ATMEGA32A-AU
TQFP-44(10x10)-40℃~+85℃ 10bit 16MHz 1KB 2.7V~5.5V 2KB 32 32KB 8 Bit AVR Built-in FLASH TQFP-44(10x10) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
DS1307ZN
DIP-8L-40℃~+85℃ 300nA 4.5V~5.5V External I2C DIP-8L Real Time Clocks ROHSHGSEMIReal Time Clocks
DS3231SN#T&R
SOIC-16-300mil-40℃~+85℃ 0.84uA 2.3V~5.5V 200uA Built-in I2C Temperature compensation、Programmable clock output、Alarm function Yes SOIC-16-300mil Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
2N7002K
SOT-23-55℃~+150℃ 1 N-channel 1.2Ω@10V、1.4Ω@5V 1.6V 2.9pF 300pC@4.5V 30pF 380mA 4.2pF 540mW 60V SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETs
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky Diodes
CR2032
-- Unclassified goods ROHSMaxellUncategorised
GL5516
插件,P=3mm-30℃~+70℃ 0.5 150V 30ms 30ms 500kΩ 540nm 5kΩ~10kΩ 插件,P=3mm Photoresistors ROHS森霸Photoresistors
README
README.mdLED Matrix Super Clock
A DIY desk clock with retro-style dot matrix display
Features
- A retro-style dot matrix display:
- 17x6 5mm LED matrix
- Different LED colors for main area, status bar and number separator
- No flickering, ghosting or uneven brightness
- High refresh rate of 460Hz
- 8-bit global brightness and 3-bit per-pixel brightness
- Global brightness is automatically (and smoothly) adjusted by ambient conditions, just like on your phone!
- Accurate timekeeping:
- Temperature-compensated crystal clock (DS3231SN chip)
- Backup power to keep the clock ticking (CR2032 battery)
- Displays minute, hour, day, weekday, month, year and even ambient temperature
- Green status bar tracks seconds (incremented every 4s)
- Five alarms with melody
- Intuitive (kinda) user interface with three buttons
- Cool acrylic glass frame
- Powered by any USB brick through a Type-B cable
- Finally, a reason to pick up that old printer cable from your drawer!
- Built around ATmega32 microcontroller, with firmware written in C++
- Uses every I/O pin on ATmega32, no wasted potential!
- No AI and no internet connection! (yup, that's a feature nowadays...)
- Totally open-source!
Documentation
- Hardware docs
- Includes schematics, design files, parts list and even assembly tips
- Frame docs
- Describes the acrylic glass frame
- Software docs
- How to flash firmware or set up development tools if you want to modify it
- LED matrix notes
- Notes on how the LED matrix works
- User manual
- What do these buttons do?!
TODO list
- Write this readme
- Make first public release
- Animated minute/hour transitions
- Reorganize font system
- More levels for highest and lowest brightness?
- Use C++ namespaces?
- Abstractions for pins and timers?
- Snake mode? :D
Parts
82| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 2N7002K | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18 +2 |
| 17 | ~ | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8, R10, R11, R12, R13, R14, R15, R16, R17 +1 |
| 8 | 0.1uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C5, C6, C7, C8, C9, C10, C11 |
| 7 | 220 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R18, R19, R20, R21, R22, R24, R25 |
| 5 | MountingHole_Pad | @Project:MountingHole_3.2mm_M3_SmallPad | H1, H2, H3, H4, H5 |
| 3 | 4.7K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R27, R28, R29 |
| 3 | SW_Push | Button_Switch_THT:SW_Tactile_SPST_Angled_PTS645Vx39-2LFS | SW1, SW2, SW3 |
| 2 | 10K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R26, R31 |
| 2 | 12pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C3 |
| 1 | 100uF | Capacitor_Tantalum_SMD:CP_EIA-7343-31_Kemet-D_Pad2.25x2.55mm_HandSolder | C1 |
| 1 | 16MHz | Crystal:Crystal_HC49-U_Vertical | Y1 |
| 1 | 1N5819WS | Diode_SMD:D_SOD-323_HandSoldering | D1 |
| 1 | 3.3K | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R23 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_MicroCrystal_MS1V-T1K | Y2 |
| 1 | ATmega ISP | Connector_IDC:IDC-Header_2x05_P2.54mm_Horizontal | J6 |
| 1 | ATmega32A-A | Package_QFP:TQFP-44_10x10mm_P0.8mm | U1 |
| 1 | CR2032 | @Project:Battery_CR2032 | BT1 |
| 1 | DS1307ZN | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 1 | DS3231SN | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U2 |
| 1 | GL5516 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | R30 |
| 1 | Led Anodes | @Project:PinSocket_1x17_P2.54mm_Vertical | J2 |
| 1 | Led Cathodes | @Project:PinSocket_1x49_P2.54mm_Vertical | J1 |
| 1 | Passive Buzzer 42R | @Project:Buzzer_12x8.5 | BZ1 |
| 1 | USB_A | Connector_USB:USB_B_TE_5787834_Vertical | J5 |
| 1 | Yellow LED 0 | Connector_PinSocket_2.54mm:PinSocket_1x01_P2.54mm_Vertical | J3 |
| 1 | Yellow LED 1 | Connector_PinSocket_2.54mm:PinSocket_1x01_P2.54mm_Vertical | J4 |
Questions
How big is the SuperClockController PCB?
It measures 139.7 × 48.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the SuperClockController use?
82 parts, built around the ATMEGA32A-AU, DS1307ZN, DS3231SN#T&R and 2N7002K. 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 SuperClockController KiCad files?
From the silicagel777/SuperClock repository on GitHub, at the commit this page was made from: the board is hw/controller/SuperClockController.kicad_pcb and its schematic hw/controller/SuperClockController.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the SuperClockController 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).
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