Nixie tube clock
About the Nixie tube clock PCB
Nixie tube clock is an open source RP2040/RP2350 PCB design by mbelanger0, published on GitHub. It is a 2-layer board measuring 157.5 × 72 mm, with 133 components from 65 distinct parts.
Its main chip is the SC1509-A4, from the RP2040/RP2350 family. Other key parts include the TPS61041DBVR, UCC3803DTR, CD40109BPW, W25Q32JV and MCP1702T-3302E/CB. By type, the board carries 49 capacitors, 45 resistors, 12 diodes, 10 ICs, 5 inductors and 2 transistors.
It belongs with the displays & leds designs in this gallery.
From the project
A nixie tube clock as a final PCB design project for ENGR3430: Eclectronics at Olin College of Engineering
Main components on the Nixie tube clock
Nixie tube clock bill of materials (BOM)
133 components, 65 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPS61041DBVR | SOT95P280X145-5N | IC1 |
| 1 | UCC3803DTR | SOIC127P600X175-8N | IC2 |
| 2 | CD40109BPW | TSSOP-16_4.4x5mm_P0.65mm | U1, U5 |
| 1 | W25Q32JV | WSON-8-1EP_6x5mm_P1.27mm_EP3.4x4.3mm | U2 |
| 1 | SC1509-A4 RP2350A | RP2350A_QFN-60_EP_7.75x7.75_Pitch0.4mm | U3 |
| 1 | MCP1702T-3302E/CB MCP1702T-3302E_CB | SOT-23-3 | U4 |
| 2 | HV5122PG-G | QFP44_10x10MC_MCH | U6, U7 |
| 1 | DS3231M+TRL DS3231M | SOIC-16W_7.5x10.3mm_P1.27mm | U8 |
| 1 | MMBTA42-TP MMBT42 | SOT-23 | Q1 |
| 1 | FDS2672CT-ND FDS2672CT | SOIC-8_3.9x4.9mm_P1.27mm | Q2 |
| 1 | IQXO-791 | IQXO-791 | X1 |
| 1 | USB4105-GF-A | USB4105-GF-A | J5 |
| 1 | 3034 Battery_Cell | BatteryHolder_Keystone_3034_1x20mm | BT1 |
| 6 | IN-14 | nixies-us-IN-14 | N1, N2, N3, N4, N5, N6 |
| 1 | SW_SPST | PinHeader_1x02_P2.54mm_Vertical | SW1 |
| 1 | BAT54HT1G BAT54 | D_SOD-323_HandSoldering | D1 |
| 1 | ES1D | D_SMA_Handsoldering | D2 |
| 1 | XZCM2MOK54WA-1VF LED | LED_0805_2012Metric | D3 |
| 1 | IN-S85TATRGB | IN-S85TATRGB | D4 |
| 1 | LTST-C170TGKT PWR | LED_0805_2012Metric | D5 |
Show 45 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MBR0530 | D_SOD-123 | D6 |
| 6 | 16347 WS2812B | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D7, D8, D9, D10, D11, D12 |
| 2 | MH2029-600Y 60ohm 100Mhz | L_0805_2012Metric | L1, L3 |
| 1 | 7447709330 33uH | WE-PD_1210 | L2 |
| 1 | AOTA-B201610S3R3-101-T 3.3µH | AOTA-B201610S3R3-101-T | L4 |
| 1 | 74479889310 10uH | L_1008_2520Metric | L5 |
| 1 | C3216X5R1C476M160AB 47uF 16v | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 3 | EMK325ABJ107MM-P 100uF 16v | C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C2, C7, C8 |
| 1 | C0603C104K4RACTU 0.1uF 16v | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3 |
| 1 | 885012207029 220pF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4 |
| 1 | CC0805JRNPO9BN431 430pF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 1 | C0603C104K4RACTU 0.1uF 16v | C_0603_1608Metric | C6 |
| 1 | C0805C102J5GACTU 1nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9 |
| 1 | C0603C561JAGAC7867 560pF 250v | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C10 |
| 1 | GRM21A5C2E101JW01D 100pF 250v | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C11 |
| 2 | GRM55DR72E105KW01L 1uF 250v | C_2220_5750Metric_Pad1.97x5.40mm_HandSolder | C12, C13 |
| 3 | CGA4J3X7T2E104M125AE 0.1uF 250v | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C14, C15, C16 |
| 22 | CL10B104JB8NNNC 0.1µF | C_0603_1608Metric | C17, C20, C21, C22, C23, C24, C25, C26 +14 |
| 5 | GRM188Z71C475KE21D 4.7µF | C_0603_1608Metric | C18, C19, C27, C28, C30 |
| 2 | GRM188R61E106KA73D 10µF | C_0603_1608Metric | C32, C33 |
| 1 | CL10B105KA8NNNC 1uF | C_0603_1608Metric | C34 |
| 1 | CL21A226MQQNNNE 22uF | C_0805_2012Metric | C35 |
| 1 | C0603C220J5GACTU 22pF | C_0603_1608Metric | C36 |
| 1 | CL31A106KAHNNNE 10uF | C_1206_3216Metric | C37 |
| 5 | RC0603FR-071KL 1K | R_0603_1608Metric | R1, R21, R23, R24, R25 |
| 2 | CRCW0805100KFKEA 100k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2, R4 |
| 1 | CRCW08052K00FKEA 2k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | CRCW080560K4FKEA 60.4k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | N.U. | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | RC0603JR-070RL 0 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7 |
| 1 | CRCW08054K12FKEA 4.12k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 1 | RC0603JR-070RL 0 | R_0603_1608Metric | R9 |
| 1 | ERJ-P06J102V 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10 |
| 1 | ERJ-6DSFR10V 0.1 1/2W | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R11 |
| 1 | CRCW0805634KFKEA 634k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12 |
| 1 | RC1206FR-077K68L 7.68k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R13 |
| 5 | ERJ-3EKF5101V 5.1K | R_0603_1608Metric | R14, R15, R16, R17, R22 |
| 2 | RC0603FR-0727RL 27Ω | R_0603_1608Metric | R18, R19 |
| 1 | RC0603FR-0733RL 33Ω | R_0603_1608Metric | R20 |
| 2 | RC0603FR-074K7L 4.7k | R_0603_1608Metric | R26, R27 |
| 6 | RMCF2512JT24K0 24k | R_2512_6332Metric | R28, R29, R30, R31, R32, R34 |
| 1 | RN73H2ATTD8763F10 875k | R_0805_2012Metric | R33 |
| 2 | RC0805FR-07100KL 100k | R_0603_1608Metric | R35, R36 |
| 6 | PR01000102402JR500 DNP | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R37, R38, R39, R40, R41, R42 |
| 3 | RC0805FR-07100KL 10k | R_0603_1608Metric | R43, R44, R45 |
Nixie tube clock design files
The KiCad project lives in the mbelanger0/nixie-tube-clock repository on GitHub; these links point at the commit this page was built from.
Nixie tube clock: common questions
What microcontroller does the Nixie tube clock use?
The Nixie tube clock is built around the SC1509-A4, from the RP2040/RP2350 family.
How big is the Nixie tube clock PCB?
The Nixie tube clock measures 157.5 × 72 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Nixie tube clock?
133 components, from 65 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 Nixie tube clock design files?
From the mbelanger0/nixie-tube-clock 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 Nixie tube clock design in my own project?
The repository has no license, so all rights stay with mbelanger0. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Nixie tube clock without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.
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