4 layers
Clock module v2.0
MitchellStride/Hummingbird-RP2040-Clock-Module
RP2040 RTC Module, highly compatible with JLCPCB's basic SMT components.
121 parts2
2 layers100 × 50 mm
RP2040 RTC Module, highly compatible with JLCPCB's basic SMT components.
- Size
- 100 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 124
- Nets
- 92
- Pads
- 408
- Tracks, vias
- 1,268, 279
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 19 Apr 2023
- Updated
- 23 Dec 2025
Overview
Clock pcb is an open-source printed circuit board by MitchellStride, from the MitchellStride/Hummingbird-RP2040-Clock-Module repository on GitHub. It is a 2-layer board of 100 × 50 mm with 124 parts on 92 nets, routed with 1,268 tracks and 279 vias.
It is built around the RP2040, DS1307Z+ and RT9080-33GJ5, with the SRV05-4, TS-1187A-B-A-B and AO3401A among its other parts. Its parts include 33 capacitors, 30 resistors, 7 connectors, 6 diodes and 5 ICs. It belongs with the lEDs and displays boards and the RP2040 boards of this library.
Main components
12
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
DS1307Z+
SO-80℃~+70℃ 10nA 300nA 4.5V~5.5V Backup power management and battery charging、InsideSRAM/NVRAM、Programmable clock output External I2C SO-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
RT9080-33GJ5
TSOT-23-5-40℃~+125℃@(Tj) 1 2uA 3.3V 360mV@(600mA) 42uVrms 5.5V 600mA 75dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive TSOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSRichtek TechVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SRV05-4
SOT-23-6L-55℃~+150℃ 15V 1pF 4A 5V 5uA 6V 80W ESD Four channels IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
TS-1187A-B-A-B
SMD-4P,5.1x5.1mm-30℃~+85℃ 1.5mm 1.6N 100,000 cycles 12V 5.1mm 5.1mm 50mA Gold No Round Button SPST Surface Mount,Vertical Without Bracket SMD-4P,5.1x5.1mm Tactile Switches ROHSXKB ConnectionTactile Switches
AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsAO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
CMT-8504-100-SMT-TR
SMD,8.5x8.5mm-40℃~+85℃ 100dB 150mA 1V~6V 4kHz 4mm 5V 8.5mm 8.5mm Electromagnetic Passive (Externally Driven) Surface Mount SMD,8.5x8.5mm Buzzers ROHSCUIBuzzers
CR2032
-- Unclassified goods ROHSMaxellUncategorised
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
SSSS811101
SMD-40℃~+85℃ 10,000 cycles 300mA 4.1mm 5V Rectangular Columnar SMD(SMT) Tab SPDT Surface Mount, Right Angle SMD Slide Switches ROHSALPSALPINESlide Switches
WS2812B-2020
SMD,2.2x2mm0.6mA 0.84mm 120us 160mcd 200mcd 2kHz 2mm 2mm 300ns 470.4nm 515.6nm 520mcd 5V 622.5nm 800Kbit/s Built-in power-on reset circuit、Built-in power-on reset circuit、Integrated intelligent reverse connection protection function Top-mount SMD,2.2x2mm RGB LEDs(Built-in IC) ROHSWorldsemiRGB LEDs(Built-In IC)
README
README.md🐦 Hummingbird RP2040 Clock Module ⏰
The Hummingbird RP2040 Clock Module is designed for crafting artisan clocks by pairing it with different clock faces. Its modular design allows this project to be shared across various display technologies.
The test OLED above shows time, my age, and my time to death countdown based on my life expectancy.
🔧 Features
- Raspberry Pi RP2040 microcontroller with dual-core ARM Cortex-M0+
- Highly compatible with JLCPCB's basic SMT components and 2L stackup for cost
- Powered via USB-C with ESD and reverse polarity protection
- DS1307Z+ RTC with CR2032 coin cell backup
- Single-sided design for a compact, flush mount
- Photocell/LDR support for automatic display dimming
- Additional features: piezoelectric buzzer, RGB LED, power switch, and optional OLED
- FFC expansion for modular clock face integration
📦 Status
The PCBA has arrived, and is working, it needed one bodge. FW is done.
💡 Clock Ideas
Clocks I plan to build using this module:
Click to expand
- Life Clock: A countdown to estimated time of death using seven-segment displays
- Nixie Clock: A personal take on the classic Nixie tube clock, featuring IN-12 tubes
- 0402 Year Calendar Inspired by the Yetch THE EVERY DAY GOAL CALENDAR
📝 Notes
Click to expand
- I had a few issues with the v1 hardware design since I completed it in roughly two days. Might do a v2.
- From 2024 (schematic design) to 2025 (layout), JLC PCB assembly changed many basic components and increased extended reel fees from $1 → $3, significantly affecting small-run costs.
- The cost per assembled PCB is approximately $8–10 USD, excluding setup fees. A total order of 2 PCBAs + 3 PCBs came to ~$57 + ~$17 shipping. After discounts, the total spent was ~$70 USD, plus $10–20 for extra parts from LCSC or Digikey. The largest expense was reel fees ($30).
See: -> ./images/cost2.png
🖼️ Image Appendix
Parts
124| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 0.1u | Capacitor_SMD:C_0402_1005Metric | C3, C4, C5, C6, C7, C9, C10, C11, C14, C15, C19, C23, C25, C32 |
| 11 | 1u | Capacitor_SMD:C_0402_1005Metric | C2, C8, C18, C20, C21, C24, C26, C27, C29, C30, C33 |
| 9 | 10k | Resistor_SMD:R_0402_1005Metric | R4, R9, R20, R23, R25, R26, R27, R28, R29 |
| 7 | 1k | Resistor_SMD:R_0402_1005Metric | R1, R11, R15, R18, R19, R24, R30 |
| 4 | Mounting_Hole | MountingHole:MountingHole_2.7mm_M2.5 | H4, H5, H6, H7 |
| 4 | TS-1187A-B-A-B | stride_footprints:SW_SPST_TL3342_RT | SW2, SW3, SW4, SW5 |
| 3 | 4.7k | Resistor_SMD:R_0402_1005Metric | R13, R14, R21 |
| 3 | 4.7u | Capacitor_SMD:C_0402_1005Metric | C16, C17, C31 |
| 3 | 5V | Connector_JST:JST_SH_SM02B-SRSS-TB_1x02-1MP_P1.00mm_Horizontal | J4, J5, J6 |
| 3 | LOGO | silk:comb | G***, G***, G*** |
| 3 | Tooling_Hole_JLC | stride_footprints:JLC_Tooling_Hole | H1, H2, H3 |
| 2 | 0 | stride_footprints:R_0402_1005Metric_3pad | R16, R17 |
| 2 | 100k | Resistor_SMD:R_0402_1005Metric | R8, R10 |
| 2 | 10p | Capacitor_SMD:C_0402_1005Metric | C12, C13 |
| 2 | 10u | Capacitor_SMD:C_0402_1005Metric | C1, C22 |
| 2 | 22 | Resistor_SMD:R_0402_1005Metric | R6, R7 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | Fiducial | Fiducial:Fiducial_1mm_Mask2mm | FID1, FID2 |
| 2 | LED_G | LED_SMD:LED_0805_2012Metric | D3, D4 |
| 1 | 12V 3A | Fuse:Fuse_1206_3216Metric | F1 |
| 1 | 2.2k | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 2.2u | Capacitor_SMD:C_0402_1005Metric | C28 |
| 1 | 2N7002 | Package_TO_SOT_SMD:SOT-23 | Q4 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 330k | Resistor_SMD:R_0402_1005Metric | R31 |
| 1 | 3V3 | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
| 1 | 5.6V | Diode_SMD:D_MiniMELF | D2 |
| 1 | 51 | Resistor_SMD:R_0402_1005Metric | R22 |
| 1 | 5V | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q3 |
| 1 | CMT-8504-100-SMT-TR | Buzzer_Beeper:MagneticBuzzer_CUI_CMT-8504-100-SMT | BZ1 |
| 1 | CR2032 | stride_footprints:Q&J_CR2032-BS-6-1 | BT1 |
| 1 | DS1307Z+ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U5 |
| 1 | FFC 24 | Connector_FFC-FPC:Hirose_FH12-24S-0.5SH_1x24-1MP_P0.50mm_Horizontal | J3 |
| 1 | G*** | kibuzzard-68226193 | kibuzzard-68226193 |
| 1 | G*** | kibuzzard-682261BD | kibuzzard-682261BD |
| 1 | G*** | kibuzzard-682261F1 | kibuzzard-682261F1 |
| 1 | G*** | kibuzzard-682261D0 | kibuzzard-682261D0 |
| 1 | G*** | kibuzzard-68226263 | kibuzzard-68226263 |
| 1 | G*** | kibuzzard-68226165 | kibuzzard-68226165 |
| 1 | G*** | kibuzzard-682261A9 | kibuzzard-682261A9 |
| 1 | G*** | kibuzzard-682261E0 | kibuzzard-682261E0 |
| 1 | GND CLIP | stride_footprints:ronghe_RH-5016_C5199799 | TP4 |
| 1 | LED_Y | LED_SMD:LED_0805_2012Metric | D1 |
| 1 | LOGO | silk:hummingbird | G*** |
| 1 | LOGO | silk:flower | G*** |
| 1 | LOGO | silk:subtitle | G*** |
| 1 | LOGO | silk:title | G*** |
| 1 | OLED | stride_footprints:OLED-128O064D_edit_reverse_v2 | J7 |
| 1 | PROG | Connector:Tag-Connect_TC2030-IDC-NL_2x03_P1.27mm_Vertical | J2 |
| 1 | RP2040 | stride_footprints:QFN-56_EP_7x7_Pitch0.4mm | U1 |
| 1 | RST | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | RT9080-33GJ5 | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | SS14 | Diode_SMD:D_SMA | D6 |
| 1 | SSSS811101 | stride_footprints:SSSS811101 | SW1 |
| 1 | USB_C_Receptacle_USB2.0 | ftp:USB-C-16p | J1 |
| 1 | VBUS | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | W25Q64JV | Package_SON:WSON-8-1EP_4x4mm_P0.8mm_EP2.2x3mm | U4 |
| 1 | WS2812B-2020 | stride_footprints:WS2812B-2020 | D5 |
| 1 | XYDBPCNANF-12MHZ | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
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Questions
How big is the Clock pcb PCB?
It measures 100 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Clock pcb use?
124 parts, built around the RP2040, DS1307Z+, RT9080-33GJ5 and SRV05-4. 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 Clock pcb KiCad files?
From the MitchellStride/Hummingbird-RP2040-Clock-Module repository on GitHub, at the commit this page was made from: the board is pcb/v2/archive/clock_pcb.kicad_pcb and its schematic pcb/v1/2.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Clock pcb design in my own project?
Its repository states no licence, so its author keeps all rights: ask MitchellStride before reusing the design.