

Worldclockv1
Electronics Projects
- Size
- 193.8 × 120 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 120
- Nets
- 70
- Pads
- 338
- Tracks, vias
- 641, 126
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Apr 2024
- Updated
- 14 May 2026
Overview
Worldclockv1 is an open-source printed circuit board by orri93, from the orri93/electronics repository on GitHub, published under the MIT licence. It is a 2-layer board of 193.8 × 120 mm with 120 parts on 70 nets, routed with 641 tracks and 126 vias.
It is built around the ESP32-WROOM-32UE-N4, LM386 and L7805, with the DS3232MZ+, BSS138 and IRLML6402 among its other parts. Its parts include 26 resistors, 18 capacitors, 10 connectors, 7 ICs and 7 transistors. It belongs with the ESP32 boards of this library.
Main components
6ESP32-WROOM-32UE-N4
SMD,19.2x18mm-40℃~+85℃ -88dBm 112mA 19.5dBm 2.4GHz 239mA 3V~3.6V Bluetooth4.2 ESP32-D0WD-V3、ESP32-D0WDR2-V3 UART、SDIO、SPI、I2C、GPIO、ADC、I2S、DAC、Ethernet、TWAI SMD,19.2x18mm WiFi Modules ROHSEspressif SystemsWiFi ModulesLM386
SOP-80.2% 0℃~+70℃ 4V~12V 4mA 50dB 700mWx1@8Ω Analog voltage gain SOP-8 Audio Amplifiers ROHSGcoreAudio Power OpAmpsL7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsDS3232MZ+
SO-8-40℃~+85℃ 100nA 125uA 2.3V~4.5V Built-in I2C Temperature compensation、Backup power management and battery charging、InsideSRAM/NVRAM、Alarm function、Periodic interrupt output Yes SO-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time ClocksBSS138
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 ROHShongjiachengMOSFETsIRLML6402
SOT-23-55℃~+150℃ 1 P-Channel 1.3W 110pF 12nC 145pF 20V 3.7A 400mV 633pF 65mΩ@4.5V P-Channel SOT-23 MOSFETs ROHSGuangdong HottechMOSFETs
README
README.mdelectronics
A personal collection of electronics projects, experiments, and reusable design assets.
This repository includes circuit designs (mostly KiCad), component libraries, simulation files, prototypes, firmware/code, and supporting documentation. It is organized as a working archive where each project can include one or more of the following:
- Hardware design files (schematics and PCB layouts)
- Build/manufacturing outputs (for example gerbers)
- Notes, references, and datasheets
- Source code or firmware when the project includes programmable parts
Folder Structure
Top-level folders are grouped by purpose. Common locations include:
circuits/: Main project folders for KiCad designs (schematics/PCBs).doc/: Documentation, references, datasheets, books, project notes, and how-to material.src/: Source code and firmware-related project code when applicable.3d/: 3D models (for example STEP files) used for PCB/mechanical integration.symbols/: KiCad symbol libraries.footprints/: KiCad footprint libraries.gerber/: Generated manufacturing outputs for selected projects.spices/: SPICE/LTspice simulation files.prototype/: Early-stage prototypes and exploratory files.projects/: Additional project work that may not fit the maincircuits/layout.media/: Images and other media assets.pcb/: Standalone PCB-related utilities or adapter boards.tools/: Tooling and utility resources.repares/: Repair-related project material.tmp/: Temporary files.
Project Organization Notes
Project contents are not always in a single folder. Depending on the project stage and history:
- KiCad circuit files are often located under
circuits/<project-name>/. - Documentation can be stored separately under
doc/. - Code or firmware is sometimes placed under
src/.
This split keeps hardware design, documentation, and software concerns organized while still allowing each project to evolve over time.
Parts
120| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | 10k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R5, R6, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R24, R25, R26 +3 |
| 10 | ID_WP | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3, JP4, JP5, JP6, JP7, JP8, JP9, JP10 |
| 6 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6 |
| 4 | 22 uF | Capacitor_SMD:CP_Elec_4x5.4 | C5, C6, C7, C8 |
| 4 | GND | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP25, TP26, TP27, TP28 |
| 4 | MountingHole_3.2mm_M3 | MountingHole:MountingHole_3.2mm_M3 | Hole1, Hole2, Hole3, Hole4 |
| 3 | 10 uF | Capacitor_SMD:CP_Elec_4x5.4 | C9, C10, C11 |
| 3 | 100 nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C3, C18 |
| 3 | L7805 | Package_TO_SOT_SMD:TO-263-3_TabPin2 | U4, U5, U6 |
| 2 | 100nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C13, C15 |
| 2 | 470 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3, R4 |
| 1 | 1 uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 1 | 1 uF | Capacitor_SMD:CP_Elec_4x5.4 | C4 |
| 1 | 10 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1 |
| 1 | 1000uF | Capacitor_SMD:CP_Elec_10x10.5 | C16 |
| 1 | 100k | Potentiometer_THT:Potentiometer_Runtron_RM-065_Vertical | RV2 |
| 1 | 100k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R23 |
| 1 | 100k | Potentiometer_THT:Potentiometer_Alps_RK163_Single_Horizontal | RV1 |
| 1 | 100uF | Capacitor_SMD:CP_Elec_6.3x7.7 | C17 |
| 1 | 10nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C12 |
| 1 | 1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R20 |
| 1 | 1uF | Capacitor_SMD:CP_Elec_4x5.4 | C14 |
| 1 | 4R7 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R22 |
| 1 | 4k7 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R21 |
| 1 | Alt | Button_Switch_THT:SW_PUSH_6mm | SW4 |
| 1 | Audio | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP10 |
| 1 | BOOT | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J10 |
| 1 | BOOT | Button_Switch_THT:SW_PUSH_6mm | SW2 |
| 1 | Battery_Cell | Battery:BatteryHolder_Keystone_3000_1x12mm | BT1 |
| 1 | DAC1 | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP7 |
| 1 | DS3232M | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | Display 1 A | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | Display 1 B | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J7 |
| 1 | Display 2 A | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J5 |
| 1 | Display 2 B | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J8 |
| 1 | Display 3 A | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J6 |
| 1 | Display 3 B | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J9 |
| 1 | EN | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP2 |
| 1 | EN | Button_Switch_THT:SW_PUSH_6mm | SW1 |
| 1 | EN GND | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP1 |
| 1 | ESP32-WROOM-32UE | RF_Module:ESP32-WROOM-32UE | U1 |
| 1 | I 3.3V A | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP17 |
| 1 | I 3.3V B | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP21 |
| 1 | I 5V #1 A | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP18 |
| 1 | I 5V #1 B | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP22 |
| 1 | I 5V #2 A | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP19 |
| 1 | I 5V #2 B | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP23 |
| 1 | I 5V #3 A | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP20 |
| 1 | I 5V #3 B | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP24 |
| 1 | I A | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP15 |
| 1 | I B | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP16 |
| 1 | IRLML6402 | Package_TO_SOT_SMD:SOT-23 | Q7 |
| 1 | LD1117S33TR_SOT223 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U3 |
| 1 | LED_Dual_AKA | LED_THT:LED_D3.0mm-3 | D1 |
| 1 | LM386 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U7 |
| 1 | Polyfuse | Fuse:Fuse_1812_4532Metric_Pad1.30x3.40mm_HandSolder | F1 |
| 1 | Power | Connector_BarrelJack:BarrelJack_Horizontal | J3 |
| 1 | RTC INT | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP14 |
| 1 | RTC RST | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP13 |
| 1 | RTC SCL | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP11 |
| 1 | RTC SDA | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP12 |
| 1 | Rotary Encoder Module | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J1 |
| 1 | RotaryEncoder_Switch | Rotary_Encoder:RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW3 |
| 1 | Speaker | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type055_RT01502HDWU_1x02_P5.00mm_Horizontal | LS1 |
| 1 | TZ1 CLK | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP3 |
| 1 | TZ1 DIO | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP4 |
| 1 | TZ2 CLK | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP5 |
| 1 | TZ2 DIO | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP6 |
| 1 | TZ3 CLK | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP8 |
| 1 | TZ3 DIO | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm | TP9 |
| 1 | UART | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J2 |
Questions
How big is the Worldclockv1 PCB?
It measures 193.8 × 120 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Worldclockv1 use?
120 parts, built around the ESP32-WROOM-32UE-N4, LM386, L7805 and DS3232MZ+. 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 Worldclockv1 KiCad files?
From the orri93/electronics repository on GitHub, at the commit this page was made from: the board is circuits/worldclockv1/worldclockv1.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Worldclockv1 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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