NosClock
About the NosClock PCB
NosClock is an open source ESP32 PCB design by hulakov, published on GitHub. It is a 2-layer board measuring 144 × 60 mm, with 103 components from 46 distinct parts.
Its main chip is the ESP32-C3-MINI-1, from the ESP32 family. Other key parts include the DS3231MZ, AP7361-33ER-13, MP2307DN-LF-Z, UC3843_SOIC8 and CD4504. By type, the board carries 37 capacitors, 25 resistors, 17 diodes, 10 ICs, 4 connectors and 2 inductors.
It belongs with the iot & wireless, displays & leds and power & battery designs in this gallery.
From the project
NosClock is a smart 6-digit Nixie tube clock. It combines vintage IN-12 Nixie tubes with modern electronics: an ESP32-C3 microcontroller, flicker-free high-voltage drivers, a battery-backed real-time clock, and addressable RGB backlighting. It runs on ESPHome, so you can control
NosClock is a smart 6-digit Nixie tube clock. It combines vintage IN-12 Nixie tubes with modern electronics: an ESP32-C3 microcontroller, flicker-free high-voltage drivers, a battery-backed real-time clock, and addressable RGB backlighting. It runs on ESPHome, so you can control it from Home Assistant and use it in automations (air raid alerts, high CO2 warnings, night mode).
Main components on the NosClock
NosClock bill of materials (BOM)
103 components, 46 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-C3-MINI-1 | ESP32-C3-MINI-1 | U101 |
| 1 | DS3231MZ | SOIC-8_3.9x4.9mm_P1.27mm | U103 |
| 1 | AP7361-33ER-13 | SOT-223-3_TabPin2 | U201 |
| 1 | MP2307DN-LF-Z | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm_ThermalVias | U202 |
| 1 | UC3843_SOIC8 | SOIC-8_3.9x4.9mm_P1.27mm | U301 |
| 1 | CD4504 | TSSOP-16_4.4x5mm_P0.65mm | U401 |
| 1 | SN74LV1T34DBV | SOT-23-5 | U402 |
| 2 | HV5222PG-G HV5222PJ | PLCC-44_SMD-Socket | U501, U601 |
| 1 | AW9523B | QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U701 |
| 1 | FQD12N20L | TO-252-2 | Q301 |
| 1 | USB_C_RECEPTACLE_USB2.0_16P USB_C_Receptacle_USB2.0_16P | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J101 |
| 1 | CONN_01X02 Conn_01x02 | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J102 |
| 1 | CONN_01X04 Conn_01x04 | Molex_PicoBlade_53047-0410_1x04_P1.25mm_Vertical | J103 |
| 1 | 12V IN | JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | J104 |
| 1 | Battery_Cell | BAT_CH291-1220LF | BT101 |
| 6 | IN-12B | nixies-us-IN-12 | NX501, NX502, NX503, NX601, NX602, NX603 |
| 1 | ES1J | D_SMA | D301 |
| 12 | SK6812MINI_ALI | LED_SK6812MINI_PLCC4_3.5x3.5mm_P1.75mm | D501, D502, D503, D504, D505, D506, D601, D602 +4 |
| 4 | LED_RAGB | LED_D5.0mm-4_RGB_Wide_Pins | D701, D702, D703, D704 |
| 1 | 10uH 4A | L_6.3x6.3_H3 | L201 |
Show 26 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 100UH 100uH | L_Chilisin_BMRF00101040 | L301 |
| 23 | 100NF 100nF | C_0603_1608Metric | C101, C103, C202, C203, C209, C301, C401, C402 +15 |
| 1 | 1UF 1uF | C_0805_2012Metric | C102 |
| 1 | 10NF 10nF | C_0603_1608Metric | C201 |
| 4 | 10UF 10uF | C_0805_2012Metric | C204, C205, C206, C702 |
| 2 | 22UF 22uF | C_0805_2012Metric | C207, C208 |
| 1 | 3.9NF 3.9nF | C_0603_1608Metric | C210 |
| 1 | 100PF 100pF | C_0603_1608Metric | C302 |
| 1 | 4.7uF 400V | CP_Radial_D10.0mm_P5.00mm | C303 |
| 1 | 220uF 35V | CP_Radial_D6.3mm_P2.50mm | C304 |
| 2 | 1NF 1nF | C_0603_1608Metric | C305, C306 |
| 2 | 10K | R_0603_1608Metric | R101, R307 |
| 3 | 4.7K | R_0603_1608Metric | R102, R103, R701 |
| 2 | 5.1K | R_0603_1608Metric | R104, R105 |
| 1 | 100K | R_0603_1608Metric | R201 |
| 1 | 30K | R_0603_1608Metric | R202 |
| 1 | 6.8K | R_0603_1608Metric | R203 |
| 1 | 7.5K | R_0603_1608Metric | R204 |
| 1 | 150K | R_0603_1608Metric | R301 |
| 1 | 10R | R_0603_1608Metric | R302 |
| 1 | 680K | R_1206_3216Metric | R303 |
| 1 | 1K | R_0603_1608Metric | R304 |
| 1 | 47K | R_0603_1608Metric | R305 |
| 2 | 0.25R | R_2512_6332Metric | R306, R308 |
| 1 | 330R | R_0603_1608Metric | R401 |
| 6 | 20K | R_1206_3216Metric | R501, R502, R503, R601, R602, R603 |
NosClock design files
The KiCad project lives in the hulakov/NosClock repository on GitHub; these links point at the commit this page was built from.
NosClock: common questions
What microcontroller does the NosClock use?
The NosClock is built around the ESP32-C3-MINI-1, from the ESP32 family.
How big is the NosClock PCB?
The NosClock measures 144 × 60 mm, has 2 copper layers and is 1.600198 mm thick.
How many components are on the NosClock?
103 components, from 46 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the NosClock design files?
From the hulakov/NosClock repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the NosClock design in my own project?
The repository has no license, so all rights stay with hulakov. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the NosClock without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.
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