Hello, and welcome
I am Lucian-Ioan Papadopol, an Italian electronics enthusiast, technical educator, software developer and licensed amateur radio operator. MADEXP is my personal space for sharing practical experiments, original circuits, software, technical notes and the occasional unusual machine rescued from another era.
I have always enjoyed the point where theory meets the workbench: a circuit becomes a functioning instrument, a few lines of code become a useful tool, or a measurement raises a better question than the one that started the experiment. This website brings those experiences together and makes them available to readers who share the same curiosity.
What you will find here
Analog electronics & high voltage
Embedded systems & instrumentation
Amateur radio & RF systems
Programming & signal processing
Retrocomputing
My professional background
I trained in electrotechnics and industrial automation at the E. Mattei Technical Institute in Urbino. My professional career began in practical installation and maintenance work, progressing through telecommunications systems, data cabling, network equipment and field coordination.
2007–2023 · Technical and industrial work
Installation and maintenance of electrical, telecommunications and data-network infrastructure, including several years as a team leader.
2023–2024 · Technical education
Teaching assignments at IPSIA G. Benelli in Pesaro and radiotechnics courses with the ARI amateur-radio association in Pesaro.
Since 2024 · Secondary-school teacher
Teaching technical subjects, laboratory activities, robotics and systems at ISISS P. Gobetti in Morciano di Romagna.
My daily work combines hands-on engineering with programming and education. My practical skills include C/C++, C# and Java, Unix/Linux systems, electronic assembly and SMD soldering, laboratory instrumentation, Siemens S7 PLCs and industrial robotics.
Selected MADEXP projects
A few examples of the hardware and software work documented on this website.
Scientific instrumentation
Cubino + Eu152
A compact gamma-spectroscopy ecosystem joining scintillation-detector hardware, audio-based acquisition and analysis software.
Radio engineering
SequencerQT
A programmable PTT sequencer and configuration software for coordinating components in a radio station.
Retrocomputing
MU90 MPO Bridge
A hardware and software bridge connecting Elektronika MK-90 memory modules to a modern Linux computer.
Publications & technical writing
Writing has long been an important part of my projects. I have contributed articles to specialist Italian electronics and amateur-radio publications, including RadioRivista, and have shared technical preprints about experimental electronic design. Titles of Italian-language magazine articles are retained in their original form to make them easy to identify in printed indexes.
RadioRivista · 2011–2014
Archive index entries under the callsign IZ6NNH.
- 2011 · December
Costruiamo una saldatrice a punti
Building a spot welder · RadioRivista (ARI), credited to IZ6NNH - 2012 · April
Niente scherzi: radioassistenza anche per il Carnevale di Fano
Amateur-radio support for the Fano Carnival · RadioRivista (ARI), credited to IZ6NNH - 2013 · May
Costruiamoci un tasto verticale
Building a straight Morse key · RadioRivista (ARI), credited to IZ6NNH - 2014 · January
Quando l’alta tensione per tutti è a costo zero!
An experimental approach to high-voltage generation · RadioRivista (ARI), credited to IZ6NNH - 2014 · March
Generatore DDS e vobulatore con AD9850
DDS signal generation and frequency sweeping · RadioRivista (ARI), credited to IZ6NNH - 2014 · May
Mike MD-200 si IC-7000
A technical note about the MD-200 microphone and IC-7000 transceiver · RadioRivista (ARI), credited to IZ6NNH
Additional RadioRivista references · 2021–2024
References from my working bibliography; issue details are being checked against the original copies.
- 2021 · Issue 3 · pp. 78–81
Un microfono da palmo speciale per il Kenwood TS-850
RadioRivista (ARI) · Reference from the author’s bibliography - 2022 · Issue 10 · pp. 62–66
Interfaccia audio-CAT flessibile per modi digitali e FT8 con isolamento galvanico
RadioRivista (ARI) · Reference from the author’s bibliography - 2024 · Issue 5 · pp. 44–49
Sistema di inseguimento ed elevazione d’antenna per EME a 144 MHz con rotore Yaesu G-5500
RadioRivista (ARI) · Reference from the author’s bibliography
Research & technical preprints
Publicly available technical manuscripts describing original experiments and designs.
- 2022 · Technical preprint
Design and application of a CMOS logic family for didactical purposes made with discrete SMD MOSFETs
ResearchGate · DOI: 10.13140/RG.2.2.30056.79367 - 2025 · Technical preprint
Experimental design of a low power, high efficiency, very small footprint and low cost SiPM bias generator including pulse buffer/amplifier and basic temperature compensation
ResearchGate · DOI: 10.13140/RG.2.2.23345.90721
I am also reconstructing the complete bibliographic list of contributions to CQ Elettronica. Additional titles, issue numbers and page references will be added as the original records are recovered.
Why I share this work
I believe that a good technical project should be understandable and reproducible. Schematics, measurement results, design decisions and working source code are often as interesting as the finished instrument.
MADEXP is an evolving collection of that work: successful experiments, ambitious prototypes, lessons learned and ideas worth returning to. I hope some of it helps others build, study or simply enjoy engineering.