2 layers70 × 39 mm
Microcontroller
Hardware7253/OperationUrd
A nixie tube clock inspired by the divergence meter from Steins;Gate.
42 parts1MIT
2 layers213 × 54 mm
Nixie board
Hardware7253/OperationUrd1A nixie tube clock inspired by the divergence meter from Steins;Gate.
- Size
- 213 × 54 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 99
- Nets
- 98
- Pads
- 359
- Tracks, vias
- 886, 47
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 5 Apr 2024
- Updated
- 28 Jan 2025
Overview
Nixie board is an open-source printed circuit board by Hardware7253, from the Hardware7253/OperationUrd repository on GitHub, published under the MIT licence. It is a 2-layer board of 213 × 54 mm with 99 parts on 98 nets, routed with 886 tracks and 47 vias.
It is built around the 74HC595, MMBTA42 and MMBTA92. Its parts include 56 resistors, 27 transistors, 3 ICs and 1 connector. It belongs with the lEDs and displays boards of this library.
Main components
3
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
MMBTA42
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mV 300V 350mW 500mA 50MHz 5V NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)MMBTA92
SOT-23-55℃~+150℃ 1 PNP 100nA 200mV 300V 350mW 500mA 50MHz 5V 60 PNP SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
README
README.mdOperation Urd
A nixie tube clock inspired by the divergence meter from Steins;Gate.
Designed in KiCad and Onshape, programmed in Rust.
Parts
99| Qty | Value | Footprint | References |
|---|---|---|---|
| 20 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R10, R13, R14, R15, R19, R20, R28, R32, R36, R40, R44, R48 +4 |
| 19 | 412k | Resistor_SMD:R_1206_3216Metric | R5, R11, R12, R16, R17, R18, R21, R23, R24, R26, R30, R34, R38, R42, R46, R50 +3 |
| 19 | MMBTA42 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5, Q6, Q10, Q11, Q13, Q15, Q17, Q19, Q21, Q23, Q25, Q27 +3 |
| 16 | 10k | Resistor_SMD:R_1206_3216Metric | R25, R27, R29, R31, R33, R35, R37, R39, R41, R43, R45, R47, R49, R51, R53, R55 |
| 8 | MMBTA92 | Package_TO_SOT_SMD:SOT-23 | Q12, Q14, Q16, Q18, Q20, Q22, Q24, Q26 |
| 8 | ~ | Custom:IN12 | N1, N2, N3, N4, N5, N6, N7, N8 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 74HC595 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U1, U2, U3 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R22 |
| 1 | Conn_01x10_Pin | Connector_IDC:IDC-Header_2x05_P2.54mm_Vertical | J1 |
Questions
How big is the Nixie board PCB?
It measures 213 × 54 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Nixie board use?
99 parts, built around the 74HC595, MMBTA42 and MMBTA92. 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 Nixie board KiCad files?
From the Hardware7253/OperationUrd repository on GitHub, at the commit this page was made from: the board is cad/PCBs/nixie_board/nixie_board.kicad_pcb and its schematic cad/PCBs/mechanical_switch_breakout/mechanical_switch_breakout.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Nixie board 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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