4 layers88.8 × 18 mm
4 layers76.8 × 26.3 mm
Ntp clock
sburgic/ntp-clockNTP Clock with ESP32 and 7-segment display
- Size
- 76.8 × 26.3 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 29
- Nets
- 28
- Pads
- 148
- Tracks, vias
- 168, 273
- Pours
- 21
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 17 Jan 2026
- Updated
- 17 Jan 2026
Overview
Ntp clock is an open-source printed circuit board by sburgic, from the sburgic/ntp-clock repository on GitHub. It is a 4-layer board of 76.8 × 26.3 mm with 29 parts on 28 nets, routed with 168 tracks and 273 vias.
It is built around the ESP32-C3-MINI-1-N4, TLV75733PDBVR-MS and CMI-1295-0585T, with the GL5516, IRLML0030 and USB4520-03-1-A among its other parts. Its parts include 10 resistors, 9 capacitors, 3 connectors, 1 IC and 1 transistor. It belongs with the lEDs and displays boards and the ESP32 and RISC-V boards of this library.
Main components
6
ESP32-C3-MINI-1-N4
SMD,16.6x13.2mm-40℃~+85℃ -98dBm 20.5dBm 350mA 3V~3.6V 84mA Integrated temperature sensor、Integrated antenna、Built-in watchdog On-board PCB Antenna SPI、UART、I2C、I2S、USB Transceiver SMD,16.6x13.2mm WiFi Modules ROHSEspressif SystemsRF Modules
TLV75733PDBVR-MS
SOT-23-5SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIUncategorised
CMI-1295-0585T
-- Buzzers ROHSCUIBuzzers
GL5516
插件,P=3mm-30℃~+70℃ 0.5 150V 30ms 30ms 500kΩ 540nm 5kΩ~10kΩ 插件,P=3mm Photoresistors ROHS森霸Photoresistors
IRLML0030
SOT-23-55℃~+150℃ 1 N-channel 2.3V 2.6nC 27mΩ@10V 30V 382pF 39pF 5.3A SOT-23 MOSFETs ROHSGuangdong HottechMOSFETsUSB4520-03-1-A
SMD-25℃~+85℃ 1 12P 48V 5A Black Female Surface Mount, Right Angle Type-C USB 2.0 SMD USB Connectors ROHSGlobal Connector Technology (GCT)USB Connectors
Parts
29| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R4, R5, R6, R8, R10 |
| 3 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C4, C7 |
| 3 | 10uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C6 |
| 2 | 12pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C5, C8 |
| 2 | 5K1 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | Jumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C9 |
| 1 | 220R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7 |
| 1 | 32.768 KHz | Crystal:Crystal_SMD_Abracon_ABM3-2Pin_5.0x3.2mm | XTAL1 |
| 1 | AUX | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J4 |
| 1 | CMI-1295-0585T | ssb-active-buzzer:TH CMI-1295-0585T | BZ1 |
| 1 | ESP32-C3-MINI-1-N4 | ssb-module-wireless:SMD ESP32-C3-MINI-1-N4 | MOD1 |
| 1 | GL5516 | ssb-passive-resistor:TH LDR GL5516 | R9 |
| 1 | INPUT | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J2 |
| 1 | IRLML0030 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | TLV75733PDBVR | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U1 |
| 1 | USB4520-03-1-A | ssb-mechanical-connector:SMD USB4520-03-1-A | J1 |
Questions
How big is the Ntp clock PCB?
It measures 76.8 × 26.3 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Ntp clock use?
29 parts, built around the ESP32-C3-MINI-1-N4, TLV75733PDBVR-MS, CMI-1295-0585T and GL5516. 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 Ntp clock KiCad files?
From the sburgic/ntp-clock repository on GitHub, at the commit this page was made from: the board is pcb/main-board/main-board.kicad_pcb and its schematic pcb/display-board/display-board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ntp clock design in my own project?
Its repository states no licence, so its author keeps all rights: ask sburgic before reusing the design.
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