A small collection of browser-based utilities
Inclinometer tool with visual radar orientation. Pitch with triangle sign selector, tilt, and track slope measurement.
Calculate and verify the UIC check digit for 7-digit rolling stock numbers (Výpočet kontrolní UIC číslice). Used in CZ, DE and others.
Full 12-digit European Vehicle Number calculator with type code and country code awareness. Supports tractive stock (UIC 438-3), coaches (438-1) and freight wagons (438-2).
Retrieve and render waveform images from older Fluke ScopeMeters via PostScript output over optical serial cables.
Live readout of the device orientation & motion APIs — tilt, compass heading, rotation rate and acceleration with a 3D visualizer. Best on a phone.
Bidirectional calculator for RTD (IEC 60751), NTC (β / Steinhart–Hart with datasheet fitter), KTY silicon PTC, thermocouples K–B (ITS-90) and diode junctions. Temperature ↔ Ω / mV.
Load a Sprint Layout .lay6 file for an interactive board view with a linked BOM — highlight parts, trace and name electrical nets, measure distances, read off the drill table, mark what is already placed, and export CSV, PNG or SVG. Runs entirely in the browser.
Plot Touchstone .s1p / .s2p sweeps from a NanoVNA — return loss, SWR, impedance, phase, |S21|, group delay and a Smith chart, with snapping markers, band overlays, limit lines, zoom/pan and CSV/PNG export. Drag files in, load bundled samples, or drive the VNA over Web Serial with live continuous sweeps and guided calibration.
Every DMI symbol, sound and system status message from ERA_ERTMS_015560 v4.0.0 (CCS TSI Appendix A) — searchable and filterable by colour, with EN/CZ text, cross-linked related symbols, reverse lookup by DMI area, and a quiz mode.
See how antenna type and gain reshape the radiation pattern — isotropic, short and ½λ dipoles, ¼λ monopole, phased pairs, collinear arrays and Yagi-Uda. E- and H-plane polars plus a 3D lobe, with directivity, beamwidth, front/back and side-lobe readouts; plots are absolute dBi, so higher gain visibly pushes the lobe outward.
Turn caliper readings into a thread designation — Ø over the crests, pitch or a span over N crests, optional depth — matched against metric, UNC/UNF/UNEF, BSW/BSF, G and NPT pipe, PG, trapezoidal, GL and GPI bottle necks and RF connector threads, external or internal, with a warning whenever two threads are caliper twins.
Fill in air-conditioning test protocols for train HVAC units on a phone, in the depot, offline — per-unit checks, clamp-meter readings with live calculated values and expected ranges, per-step instructions, EN/CZ, and a Czech PDF export. Installable; everything stays in the browser on your own device.