2 layers88.2 × 32.2 mm
2 layers100 × 100 mm
RoundClock
cawapy/RoundClockKiCad schematics and PCB for building a VFD clock
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 359
- Nets
- 139
- Pads
- 678
- Tracks, vias
- 883, 85
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 15 Apr 2018
- Updated
- 2 Nov 2018
Overview
RoundClock is an open-source printed circuit board by cawapy, from the cawapy/RoundClock repository on GitHub. It is a 2-layer board of 100 × 100 mm with 359 parts on 139 nets, routed with 883 tracks and 85 vias.
It is built around the ATMEGA328P-AU, PT6315-LQ and CH340G, with the DS3231MZ/V+, SN74LVC1G04DBV and CR2032 among its other parts. Its parts include 23 capacitors, 22 resistors, 10 ICs, 8 diodes and 5 connectors. It belongs with the lEDs and displays boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
6
ATMEGA328P-AU
TQFP-32(7x7)-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
PT6315-LQ
LQFP-44(10x10)LQFP-44(10x10) VFD Drivers ROHSPTCVFD Drivers
CH340G
SOP-16-40℃~+85℃ 2Mbps 3.3V、5V USB 2.0 USB to UART SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
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
SN74LVC1G04DBV
SOT-23-5-40℃~+125℃ 1 1 1.65V~5.5V 1.7V~2V 10uA 2.4V 3.7ns@5V,50pF 32mA 32mA 400mV 700mV~800mV 74LVC 电源关断保护 SOT-23-5 Inverters ROHSTexas InstrumentsInverters
CR2032
-- Unclassified goods ROHSMaxellUncategorised
README
readme.mdRound Clock
Work in progress. Not yet ready. Do not produce PCB according to this project! This will not work.
This is a KiCad project for building a clock using these two VFD displays:
-
Radio controlled clock
-
Clock face time display
-
Additional 8x text display, allowing to show
- Date
- Temperature
-
5 buttons
-
5V operation
-
The VFDs are driven by 2 PT6315
-
The clock is controlled by an Atmega328P
-
Time signal will be received from DCF-77 by the Pollin DCF-1 receiver
-
There is a USB-to-serial port using CH340G
- For an Arduino-like programming interface
- For optional control of the clock via PC
-
Battery backed clock
-
FRAM for saving settings
Parts
359| Qty | Value | Footprint | References |
|---|---|---|---|
| 254 | 0.3 | Own:via-0.3-0.6 | via, via, via, via, via, via, via, via, via, via, via, via, via, via, via, via +238 |
| 16 | Measurement_Points:Measurement_Point_Square-SMD-Pad_Big | , , , , , , , , , , , , , , , | |
| 12 | 100n | Capacitors_SMD:C_0805_HandSoldering | C401, C402, C701, C702, C901, C902, C903, C1002, C1003, C1101, C1201, C1202 |
| 5 | 100K | Resistors_SMD:R_0805_HandSoldering | R201, R202, R203, R403, R703 |
| 5 | 10K | Resistors_SMD:R_0805_HandSoldering | R301, R404, R704, R901, R903 |
| 5 | 1N4148 | Diodes_SMD:D_SOD-123 | D301, D302, D303, D304, D305 |
| 5 | SW_Push | Buttons_Switches_THT:SW_Tactile_SKHH_Angled | SW301, SW302, SW303, SW304, SW305 |
| 4 | Mounting_Holes:MountingHole_3.2mm_M3 | , , , | |
| 4 | 100 | Resistors_SMD:R_0805_HandSoldering | R501, R502, R801, R802 |
| 4 | 22p | Capacitors_SMD:C_0805_HandSoldering | C904, C905, C1104, C1105 |
| 4 | 47u/50V | Capacitors_SMD:CP_Elec_8x6.7 | C501, C502, C801, C802 |
| 2 | Symbols:Symbol_Barrel_Polarity | , | |
| 2 | Mounting_Holes:MountingHole_3mm | , | |
| 2 | 220K/300K | Resistors_SMD:R_0805_HandSoldering | R402, R702 |
| 2 | 4K7 | Resistors_SMD:R_0805_HandSoldering | R904, R905 |
| 2 | 50K | Resistors_SMD:R_0805_HandSoldering | R401, R701 |
| 2 | PT6315 | Housings_QFP:LQFP-44_10x10mm_Pitch0.8mm | U401, U701 |
| 1 | 10n | Capacitors_SMD:C_0805_HandSoldering | C1103 |
| 1 | 10u | Capacitors_SMD:C_0805_HandSoldering | C1102 |
| 1 | 12M | Crystals:Crystal_SMD_3225-4pin_3.2x2.5mm_HandSoldering | Y1101 |
| 1 | 16M | Crystals:Crystal_SMD_3225-4pin_3.2x2.5mm_HandSoldering | Y901 |
| 1 | 20070-1A04 | Own:VFD-2F-1NP-24-1NP-2F@2.0mm | VFD601 |
| 1 | 3K | Resistors_SMD:R_0805_HandSoldering | R1001 |
| 1 | 4n7 | Capacitors_SMD:C_0805_HandSoldering | C1106 |
| 1 | 5K6 | Resistors_SMD:R_0805_HandSoldering | R1002 |
| 1 | ATMEGA328P-AU | Housings_QFP:TQFP-32_7x7mm_Pitch0.8mm | U901 |
| 1 | BOE-VFD48-1202FN | Own:VFD-3F-2NP-28-2NP-3F@1.5mm | VFD301 |
| 1 | CH340G | Housings_SSOP:SOP-16_4.4x10.4mm_Pitch1.27mm | U1103 |
| 1 | CR2032 | Own:Battery-Holder-2032 | XBT1001 |
| 1 | DC-DC-Converter | Own:DC-DC-Dual-Out | U201 |
| 1 | DCF1 | Own:DCF1 | U1004 |
| 1 | DS3231MZ | Housings_SOIC:SOIC-8_3.9x4.9mm_Pitch1.27mm | U1002 |
| 1 | FM24C04A | Housings_SOIC:SOIC-8_3.9x4.9mm_Pitch1.27mm | U1003 |
| 1 | I2C | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | J902 |
| 1 | ISP | Pin_Headers:Pin_Header_Straight_2x03_Pitch2.54mm | J904 |
| 1 | Jack-DC | Connectors:BARREL_JACK | J101 |
| 1 | LOGO | Own:USB-Logo | G*** |
| 1 | SI9986/7 | Housings_SOIC:SOIC-8_3.9x4.9mm_Pitch1.27mm | U1202 |
| 1 | SN74LVC1G04 | TO_SOT_Packages_SMD:SOT-23-5 | U1201 |
| 1 | UART | Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm | J1101 |
| 1 | USB_OTG | Connectors:USB_Mini-B | J1102 |
| 1 | Z13V | Diodes_SMD:D_MELF_Handsoldering | D203 |
| 1 | Z5V | Diodes_SMD:D_MELF_Handsoldering | D201 |
| 1 | Z8V | Diodes_SMD:D_MELF_Handsoldering | D202 |
The 357 most common of 359 parts.
Questions
How big is the RoundClock PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the RoundClock use?
359 parts, built around the ATMEGA328P-AU, PT6315-LQ, CH340G and DS3231MZ/V+. 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 RoundClock KiCad files?
From the cawapy/RoundClock repository on GitHub, at the commit this page was made from: the board is RoundClock.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the RoundClock design in my own project?
Its repository states no licence, so its author keeps all rights: ask cawapy before reusing the design.
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