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 layers31.7 × 29.2 mm
Epaper driver
locked/picoclockThis repo is an attempt at building a Pico based alarm clock. It was created for my kids and features:
- Size
- 31.7 × 29.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 35
- Pads
- 102
- Tracks, vias
- 148, 23
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 9 Jun 2024
- Updated
- 15 Aug 2026
Overview
Epaper driver is an open-source printed circuit board by locked, from the locked/picoclock repository on GitHub. It is a 2-layer board of 31.7 × 29.2 mm with 34 parts on 35 nets, routed with 148 tracks and 23 vias.
It is built around the MBR0530, AO3401A and BSS138, with the S8050 among its other parts. Its parts include 11 capacitors, 7 resistors, 6 connectors, 3 diodes and 3 transistors. It belongs with the lEDs and displays boards of this library.
Main components
4
MBR0530
SOD-1231 Independent 30V 5.5A 500mA 550mV@500mA 80uA@30V SOD-123 Schottky Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Schottky Diodes
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 SemiconductorMOSFETsBSS138
SOT-23-55℃~+150℃ 1 N-channel 1.1Ω@10V、1.2Ω@4.5V 1.2V 1.7nC@10V 17.5pF 340mA 350mW 50V 6.5pF N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETsS8050
SOT-23-55℃~+150℃ 1 NPN 100MHz 100nA 120 25V 300mW 500mA 5V 600mV NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
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
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1uF/25V | Capacitor_SMD:C_0603_1608Metric | C1, C4, C5, C6, C7, C8 |
| 3 | MBR0530 | Diode_SMD:D_SOD-123 | D1, D2, D3 |
| 3 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H1, H2 |
| 2 | 10K | Resistor_SMD:R_0603_1608Metric | R1, R5 |
| 2 | 1uF/10V | Capacitor_SMD:C_0603_1608Metric | C2, C3 |
| 2 | 4.7uF | Capacitor_SMD:C_0603_1608Metric | C9, C10 |
| 2 | Conn_01x03_Pin | Connector_PinHeader_1.00mm:PinHeader_1x03_P1.00mm_Vertical | J3, J4 |
| 1 | 0.47 | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 100K | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 104 | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 10uH | Inductor_SMD:L_TDK_NLV32_3.2x2.5mm | L1 |
| 1 | 27 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 3 | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 47K | Resistor_SMD:R_0603_1608Metric | R7 |
| 1 | AO3401A | Package_TO_SOT_SMD:SOT-23-3 | Q2 |
| 1 | BSS138 | Package_TO_SOT_SMD:SOT-23-3 | Q1 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J5 |
| 1 | Conn_01x24 | Connector_FFC-FPC:Hirose_FH12-24S-0.5SH_1x24-1MP_P0.50mm_Horizontal | J2 |
| 1 | Main Conn | Connector_PinHeader_2.54mm:PinHeader_1x09_P2.54mm_Vertical | J1 |
| 1 | S8050 | Package_TO_SOT_SMD:SOT-23-3 | Q3 |
| 1 | SUPPORT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J8 |
Questions
How big is the Epaper driver PCB?
It measures 31.7 × 29.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Epaper driver use?
34 parts, built around the MBR0530, AO3401A, BSS138 and S8050. 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 Epaper driver KiCad files?
From the locked/picoclock repository on GitHub, at the commit this page was made from: the board is pcb/epaper-driver/epaper-driver.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 Epaper driver design in my own project?
Its repository states no licence, so its author keeps all rights: ask locked before reusing the design.
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