4 layers90 × 50 mm
4 layers242.8 × 190 mm
Contactless power meter driving 2 nixie tubes to show current or power through the sensor.
- Size
- 242.8 × 190 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 74
- Nets
- 99
- Pads
- 265
- Tracks, vias
- 1,032, 187
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Oct 2025
- Updated
- 26 Jan 2026
Overview
NixiePM is an open-source printed circuit board by MechatronikMonkey, from the MechatronikMonkey/NixiePowerMeter repository on GitHub. It is a 4-layer board of 242.8 × 190 mm with 74 parts on 99 nets, routed with 1,032 tracks and 187 vias.
It is built around the IRM-03-5, KAQY214ATLD and 74HC595D,118, with the 2EZ91D5, 0603B472K500NT and 450BXW47MEFR16X25 among its other parts. Its parts include 27 ICs, 25 resistors, 8 capacitors and 3 diodes. It belongs with the sensors and measurement boards and the ESP32 boards of this library.
Main components
6
IRM-03-5
DIP-51 3W 5V 600mA 72% 85VAC~305VAC AC-DC Short Circuit Protection、Overvoltage protection DIP-5 Power Module/Power Supply ROHSMWAC-DC Power Modules
KAQY214ATLD
SMD-4P-40℃~+85℃ 1.2V 100us 130mA 20Ω 300us 400V 50mA 550mW 5kV AC,DC One set normally open: 2A (SPST - normally open) SMD-4P Solid State Relays (MOS Output) ROHSCosmoSolid State Relays (MOS Output)
74HC595D,118
SOIC-16-40℃~+125℃ 1 100MHz 19ns@4.5V,50pF 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOIC-16 Shift Registers ROHSNexperiaShift Registers
2EZ91D5
DO-41Zener DiodesLGE
0603B472K500NT
06034.7nF 50V X7R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT
450BXW47MEFR16X25
插件,D16xL25mm-40℃~+105℃ 1.25A@100kHz 12000hrs@105℃ 16mm 25mm 450V 47uF 7.5mm ±20% 插件,D16xL25mm Aluminum Electrolytic Capacitors - Leaded ROHSRubyconAluminum Electrolytic Capacitors - Leaded
README
electronics/README.mdWB50 KiCad Projektstruktur
Dieses Verzeichnis enthält das komplette KiCad-Projekt inkl. lokaler Bibliotheken, Teilschaltpläne, PCB-Hilfsdateien und Fertigungs-/Montageordner.
Struktur
- libraries/
- symbols/: Projekt‑Symbolbibliothek
wb50_symbols.kicad_sym - footprints/: Projekt‑Footprints in
wb50_footprints.pretty/ - 3dmodels/: 3D‑Modelle (optional)
- symbols/: Projekt‑Symbolbibliothek
- schematics/: Teilschaltpläne, die später als Hierarchieblätter in
wb50.kicad_scheingebunden werden - pcb/: DXF‑Hilfsdateien (Board‑Outline, Keepouts, Front/Rear‑Panel‑Guides)
- fabrication/: Gerber/Bohrdaten, Fab‑Notizen, Stückliste und Pick&Place
- simulation/spice/: SPICE‑Testbench und Model‑Hinweise
Erste Schritte (Front‑/Rear‑Panel zuerst)
- Symbole & Footprints erstellen/zuweisen
- Externe Bedienelemente (Potenziometer, Schalter, Klinken, Netz‑/Standby‑Schalter, LED) als Symbole in
wb50_symbols.kicad_sympflegen. - Passende Footprints in
wb50_footprints.pretty/ablegen oder Standardbibliotheken verwenden.
- Externe Bedienelemente (Potenziometer, Schalter, Klinken, Netz‑/Standby‑Schalter, LED) als Symbole in
- Teilschaltpläne befüllen
- In
schematics/liegen Platzhalter für Preamp, Voicing‑Relays, Tone‑Stack, FX‑Loop, Masters, PI, Power‑Amp, NFB‑Shaping, Power‑Supply, Control‑Power. - Externe Bedienelemente zunächst sauber im Schaltplan anlegen (mit eindeutigen Referenzen und Netz‑Namen).
- In
- PCB‑Vormontage der Front/Rear‑Elemente
- Im PCB‑Editor die Footprints der externen Bedienelemente zuerst entsprechend der Front/Rear‑Panel‑Mechanik platzieren.
- DXF‑Hilfsgeometrie in
pcb/importieren (Panel‑Bohrungen/Abstände), um Positionen zu verifizieren.
- Verdrahtung/Netze nachziehen
- Danach restliche Baugruppen platzieren, sensible Netze kurz halten (Grids, CF→Tonestack), sternförmige Masseführung beachten.
Tipp: In der sym-lib-table und fp-lib-table sind die lokalen Bibliotheken bereits auf ${KIPRJMOD} referenziert.
Parts
74| Qty | Value | Footprint | References |
|---|---|---|---|
| 20 | 0603WAF2000T5E | footprints:R0603 | R1, R2, R3, R4, R5, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20 +4 |
| 20 | KAQY214ATLD | footprints:SMD-4_L4.6-W6.4-P2.54-LS10.0-BR | U10, U11, U12, U13, U14, U15, U16, U17, U18, U19, U20, U21, U22, U23, U24, U25 +4 |
| 7 | MountHole | MountingHole:MountingHole_3.2mm_M3 | MH1, MH2, MH3, MH4, MH5, MH6, MH7 |
| 4 | 100nF 50V X7R | footprints:C0805 | C2, C3, C4, C5 |
| 3 | 74HC595D,118 | footprints:SOIC-16_L9.9-W3.9-P1.27-LS6.0-BL | U5, U6, U7 |
| 2 | 0603WAF1002T5E | footprints:R0603 | R22, R23 |
| 2 | 2EZ91D5 | footprints:DO-41_BD2.4-L4.7-P8.70-D0.8-RD | D3, D4 |
| 2 | AC ~ 230V | TestPoint:TestPoint_THTPad_D3.0mm_Drill1.5mm | AC1, AC2 |
| 2 | IN-8 | footprints:IN-8_NIXIE | NX1, NX2 |
| 1 | 0603B472K500NT | footprints:C0603 | C8 |
| 1 | 0603WAF1201T5E | footprints:R0603 | R24 |
| 1 | 0603WAF3301T5E | footprints:R0603 | R25 |
| 1 | 16A 20mm 500V 5mm Plugin Fuse | footprints:FUSE-TH_L22.5-W10.8-P22.50_0031.8201.G | U2 |
| 1 | 33uF 500V 5R5-ESR | footprints:CAP-TH_BD12.5-P5.00-D0.6-FD | C6 |
| 1 | 450BXW47MEFR16X25 | footprints:CAP-TH_BD16.0-P7.50-D1.2-FD | C7 |
| 1 | CFR03SJ0153AA0_15k | footprints:RES-TH_BD6.0-L17.5-P21.50-D0.8 | R21 |
| 1 | CL10A475KO8NNNC | footprints:C0603 | C1 |
| 1 | ESP32-ZERO | footprints:COMM-SMD_ESP32-ZERO | U3 |
| 1 | IRM-03-5 | footprints:PWRM-TH_IRM-03-5-DIP5 | U1 |
| 1 | MB26S_C475740 | footprints:MBS_L4.7-W4.0-P2.50-LS7.0-BL | D1 |
| 1 | QNHC3 | footprints:HALL-SENSOR_5P-P2.54-H13.5 | U4 |
Questions
How big is the NixiePM PCB?
It measures 242.8 × 190 mm and has 4 copper layers, 1.6 mm thick.
What parts does the NixiePM use?
74 parts, built around the IRM-03-5, KAQY214ATLD, 74HC595D,118 and 2EZ91D5. 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 NixiePM KiCad files?
From the MechatronikMonkey/NixiePowerMeter repository on GitHub, at the commit this page was made from: the board is electronics/NixiePM.kicad_pcb and its schematic electronics/NixiePM.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the NixiePM design in my own project?
Its repository states no licence, so its author keeps all rights: ask MechatronikMonkey before reusing the design.
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