4 layers140 × 54 mm
Picoclock
locked/picoclock
This repo is an attempt at building a Pico based alarm clock. It was created for my kids and features:
146 parts
2 layers175.8 × 64 mm
Picoclock
locked/picoclockThis repo is an attempt at building a Pico based alarm clock. It was created for my kids and features:
- Size
- 175.8 × 64 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 73
- Nets
- 106
- Pads
- 376
- Tracks, vias
- 470, 50
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 9 Jun 2024
- Updated
- 15 Aug 2026
Overview
Picoclock is an open-source printed circuit board by locked, from the locked/picoclock repository on GitHub. It is a 2-layer board of 175.8 × 64 mm with 73 parts on 106 nets, routed with 470 tracks and 50 vias.
It is built around the PAM8403DR, PCF8563T/5 and PCM5100PW. Its parts include 17 capacitors, 16 resistors, 14 connectors, 7 ICs and 6 switches. It belongs with the RP2040 boards of this library.
Main components
3
PAM8403DR
SOIC-16-40℃~+85℃ -59dB 0.15% 2 Single-Ended Inputs 2-Channel 2.8V~5.5V 3Wx2@4Ω 80dB 87% 8mA Class D Filterless architecture SOIC-16 Audio Amplifiers ROHSDiodes IncorporatedAudio Amplifiers
PCF8563T/5
SO-8-40℃~+85℃ 0.25uA 1V~5.5V Battery low-voltage detection、Programmable clock output、Alarm function、Countdown timer I2C Yes SO-8 Real Time Clocks ROHSNXP SemiconductorsReal Time Clocks
PCM5100PW
TSSOP-20-25℃~+85℃ 2 3.3V~3.6V Digital filtering、Power-down mode I2S TSSOP-20 ADCs/DACs - Special Purpose ROHSTexas InstrumentsADCs/DACs - Special Purpose
README
README.mdRP2040 based Alarm Clock
Presentation
This repo is an attempt at building a Pico based alarm clock. It was created for my kids and features:
- date/time (obviously)
- alarm (plays wav file on sdcard)
- weather (current and forecast)
- epaper screen
- 3d printable case
The configuration is done remotely, and the clock synchronize from time to time (it can be forced too). The time is also fetched from a remote server.
Repository Architecture
- 3d: contains printable models for the case, buttons
- fw: the firmware, based on a lightweight "rtos"
- pcb: the PCBs:
- the main PCB receiving the RP2040 board
- the front PCB with the backlight leds
- api: remote api basic php script
Pictures
Build
mkdir build
cd build
cmake -DCMAKE_BUILD_TYPE=Debug ..
makeParts
73| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 10K | Resistor_SMD:R_0603_1608Metric | R1, R3, R8, R9, R10, R11, R12, R13, R16 |
| 6 | SW_Push | Button_Switch_SMD:SW_SPST_PTS645 | SW1, SW2, SW3, SW4, SW5, SW6 |
| 5 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C3, C4, C5, C9, C12 |
| 4 | 470 | Resistor_SMD:R_0603_1608Metric | R2, R4, R14, R15 |
| 4 | MountingHole | MountingHole:MountingHole_3mm_Pad | H1, H2, H3, H4 |
| 4 | screen_adapter1 | MountingHole:MountingHole_3mm | H5, H6, H7, H8 |
| 4 | xx | Connector_PinSocket_2.54mm:PinSocket_1x08_P2.54mm_Vertical | J3, J4, J7, J8 |
| 3 | 1uF | Capacitor_SMD:C_0603_1608Metric | C13, C14, C15 |
| 2 | 100nF | Capacitor_SMD:C_0603_1608Metric | C2, C17 |
| 2 | 2.2nF | Capacitor_SMD:C_0603_1608Metric | C10, C11 |
| 2 | 2.2uF | Capacitor_SMD:C_0402_1005Metric | C7, C8 |
| 2 | 5.1K | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | AUDIO | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2, J13 |
| 2 | SJB | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1, JP2 |
| 1 | 1.5K | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C6 |
| 1 | 1A 20V Schottky | Diode_SMD:D_SOD-123F | D1 |
| 1 | 22pF | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | 3V Cell | cell:MPD_BC501SM-TR | BT1 |
| 1 | 470uF | Capacitor_SMD:C_0603_1608Metric | C16 |
| 1 | Alt Power | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J11 |
| 1 | Crystal | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | MCP23009-SO | Package_SO:SSOP-20_5.3x7.2mm_P0.65mm | U6 |
| 1 | MCP4652T | Package_SO:MSOP-10_3x3mm_P0.5mm | U7 |
| 1 | MCP9808_MSOP | Package_SO:MSOP-8_3x3mm_P0.65mm | U3 |
| 1 | Micro_SD_Card_Det1 | Connector_Card:microSD_HC_Hirose_DM3AT-SF-PEJM5 | J5 |
| 1 | PAM8403D | Package_SO:SOP-16_3.9x9.9mm_P1.27mm | U5 |
| 1 | PCF8563T | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | PCM5100 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U4 |
| 1 | PWM | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J12 |
| 1 | Pico | clock:RPi_Pico_SMD_TH | U2 |
| 1 | SUPPORT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J14 |
| 1 | UART | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | USB | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J10 |
| 1 | USB_C_Receptacle | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J6 |
| 1 | screen_adapter_connector | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J9 |
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Questions
How big is the Picoclock PCB?
It measures 175.8 × 64 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Picoclock use?
73 parts, built around the PAM8403DR, PCF8563T/5 and PCM5100PW. 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 Picoclock KiCad files?
From the locked/picoclock repository on GitHub, at the commit this page was made from: the board is pcb/rev2/picoclock.kicad_pcb and its schematic pcb-mini/CYW43439/4L/CYW43439.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Picoclock design in my own project?
Its repository states no licence, so its author keeps all rights: ask locked before reusing the design.