Sorin Marghitoiu, KO6ETZ
Software Engineer · Consultant · Ham Radio · Indie Developer
I build radio control software, audio visualizers, and hardware projects, then put them all here. Over 20 years as a software engineer, including 17 years managing USC’s CiSoft lab and 7 as a Chevron consultant.
Just Released
Project page →
Voronoi DD 2.0: now in 3D
Interactive Voronoi and power diagrams now work in space. Points and 3D segments (wells, vessels, fibers) carve a box, a sphere, a gem, a vase, a bone or a chess pawn into exact polyhedral cells that you can slice, explode, animate and measure, right in the browser.
- Eleven shapes, from capsules and cones to a vase and a chess pawn
- Section planes with exact cut faces and a live 2D cross-section
- Explode, peel, print build-up and live re-tessellating animations, recorded to video
- Volume, sphericity and contact areas per cell, plus OBJ, VTK and printable STL export
- Sixteen 3D datasets: crystals, embryos, reservoirs, galaxies, vases and more
Apps & Software
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ShackLink Suite
Control your ham radios from anywhere. Server with Morse/RTTY/PSK31/SSTV decoders, plus desktop, mobile, web, and Home Assistant clients.
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Stereo Spectrum Analyzer
40+ audio-reactive visualizations, built-in music player, 30,000+ internet radio stations, and a shader sandbox.
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Intimate Connection
Private mood-sharing for couples. AES-256-GCM encrypted, local WiFi only. No servers, no accounts, no data harvesting.
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RAMSA Meter Bridge
A 390-LED meter bridge from Panasonic’s 1998 RAMSA WR-DA7 console, brought back to life as a spectrum analyzer for whatever the PC is playing.
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RF Bench Analyser
A spectrum analyser front panel for the whole bench: a Rohde & Schwarz CMU200, a tinySA, an oscilloscope, a NanoVNA and a rack of SDRs behind one window, with measurement windows, a network analyser and a transmitter and receiver test bench.
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ShackLink Knob
A ShackLink client you hold in one hand: a real tuning knob and a round touch screen with live spectrum, waterfall, 48 shared memories, and station audio in your headphones.
Read more →Petroleum Software
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Decline Analysis
Fits exponential, harmonic and hyperbolic decline curves to irregular well production histories, driving scipy differential evolution from a VB.NET front end.
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Voronoi DD
Weighted and line-segment Voronoi diagrams for drainage areas and, since 2.0, drainage volumes in 3D: one tested core on the desktop and in the browser.
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Interwell Connectivity
Quantifies which injector feeds which producer across a waterflood, using an FIR capacitance model behind an eight-project multi-tier .NET platform.
See portfolio →What I’m Working On
Last updated: October 2026
- Shipped Voronoi DD 2.0: 3D Voronoi and power cells with slicing, exploded views, volume analytics and mesh export, on the desktop and in the browser.
- Shipped Stereo Spectrum Analyzer v2: 40+ visualizations, built-in player, internet radio, SKSL shader sandbox, network media browsing.
- Shipped Spectra Media Player: Mobile version for Android & iOS with 37+ visualizations, 62 shader presets, and molecule structures from PubChem.
- Active ShackLink SSTV decoder: Adding support for Robot, Martin, Scottie, PD, Wraase, and Pasokon modes.
- Ongoing ShackLink Suite: Ongoing development of the remote radio-control ecosystem: server, decoders, SDR features, and desktop, mobile, web, and Home Assistant clients.
- Ongoing Lumea Vidă translation: Translating my father’s philosophical treatise “The Void World” from Romanian to English. ~9% complete.