Ljubomir Vračar – projects page 

Personal Information

  • Full Name: Prof. Dr. Ljubomir Vračar
  • Year and Place of Birth: 1973, Belgrade
  • Email: ljubomir.vracar@elfak.ni.ac.rs, ljubomir.vracar@gmail.com

Education

  • Ph.D. Studies: Ph.D. dissertation titled “Design and Implementation of Tactile and Self-Powered Microsystems”, Faculty of Electronic Engineering in Niš (defended on November 7, 2014).
  • M.Sc. Studies: Master’s thesis titled “Automatic Electrical Characterization of Thin MOS Gate Dielectrics”, field of study Microelectronics, Faculty of Electronic Engineering in Niš (defended on June 12, 2009).
  • B.Sc. Studies: Graduation thesis titled “Failure Analysis Methods for Microelectronic Components”, Faculty of Electronic Engineering in Niš (defended on October 18, 1999).
  • Primary and Secondary Education: Completed in Požarevac with academic honors (Vuk Karadžić Diploma recipient). Participant in regional and national competitions in computer science and electronics (two-time 1st place winner at the national competition in computer applications for data acquisition).

Career and Academic Titles

  • Full Professor: Academic field: Microelectronics and Microsystems (appointed April 27, 2026).
  • Senior Research Associate: Academic title (acquired January 30, 2026).
  • Associate Professor: Academic field: Microelectronics and Microsystems (appointed June 10, 2021).
  • Assistant Professor: Academic field: Microelectronics and Microsystems (appointed May 31, 2016).
  • Teaching Assistant: Faculty of Electronic Engineering in Niš (since March 1, 2002).
  • Research Assistant: Faculty of Electronic Engineering in Niš (1999–2002).

Research Areas

  • Smart City Technologies
  • Internet of Things (IoT)
  • Sensors and Microsensors
  • Autonomous Sensors
  • Energy Harvesting (Self-Powered Sensors)
  • Vibro-Diagnostics
  • Intellectual Property
  • 3D Printing

Registered National Patents

  • “Programmable Key Keyboard and Method for Assigning Identification Marks to Keys”, Lead Inventor: Ljubomir Vračar, registered in the Patent Register of the Intellectual Property Office under number 52967, November 28, 2013, RS52967B.
  • “Capacitive Pressure Sensor with Multilayer Dielectric”, Lead Inventor: Ljubomir Vračar, registered in the Patent Register of the Intellectual Property Office under number 52973, November 29, 2013, RS52973B.
  • “Push-button Switch Implemented in Printed Circuit Board Technology”, Lead Inventor: Ljubomir Vračar, registered in the Patent Register of the Intellectual Property Office under number 529974, November 29, 2013, RS52974B.
  • “Thermoelectric Self-Powered Device Based on Metal Printed Circuit Board Technology”, registered in the Patent Register of the Intellectual Property Office under number 55393, March 16, 2017, RS55393B1.

Published International Patent

  • “A NEW METHOD FOR CONSTRUCTION OF ROBUST SWITCHING DEVICES BASED ON THE PRINTED CIRCUIT BOARD TECHNOLOGY”, WO2012091594A2 (A3) • 2012-07-05 • VRACAR LJUBOMIR [RS], Earliest priority: 2010-12-28 • Earliest publication: 2011-10-31

Cooperation with Domestic and International Institutions

  • Petnica Science Center, Valjevo, Serbia, 2002–2007 (Head of the “Applied Physics and Electronics” seminar).
  • Weizmann Institute of Science, Dept. of Science Teaching, Tel Aviv, Israel, 2002 (Establishing international cooperation with Israel in the exchange and education of young talent).
  • DLR Institute for Planetary Research, Berlin, Germany, 2003 (Participation in the project “HEB Mixers: Design of Quasi-Optical Antennas”).
  • CERN – European Organization for Nuclear Research, Geneva, Switzerland, 2004.
  • Institute of Physics, Faculty of Natural Sciences and Mathematics, Skopje, North Macedonia, 2005 (Development of ultrathin dielectric films for nano-component applications).
  • Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria, 2007 (Development and characterization of ultrathin dielectric films for nano-component applications).
  • Participated as a team leader in the “Best Technological Innovation in Serbia” competition organized by the Ministry of Education, Science and Technological Development:
    • Lj. Vračar, D. Danković, S. Dević, D. Nešić, “Team PELTEH – Self-Powered Temperature Sensor”, 3rd place in the Innovative Ideas category, 2011.
    • Lj. Vračar, S. Dević, D. Nešić, “Team ARMADILLO – Industrial Push-button Switch in PCB Technology”, 2nd place in the Realized Innovations category, 2012.
  • Recipient of two Gold Plaques at the 5th Innovation Exhibition Ivanić-Grad, held May 17–18, 2018, in Croatia, for the “SmartLab Acquisition System” and the “Self-Powered Sensor System ‘CVET’ (Energy Harvesting WSN)”.

Teaching and Pedagogical Work

  • Since 2002, Dr. Ljubomir Vračar has been conducting problem-solving and laboratory classes for the following courses: Microelectronic Materials, Microelectronic Technologies, Failure Physics and Diagnostics, Electrical Engineering Materials, Physical Electronics, MEMS, Electronic Components, Sensors and Transducers, and Power Components.
  • Dr. Ljubomir Vračar is the author of the following instructional materials for undergraduate students at the Faculty of Electronic Engineering in Niš:
    • Lj. Vračar, M. Stojanović, J. Vračar, “Laboratory Practicum with Examples for Independent Work in the Course SENSORS AND TRANSDUCERS”, ISBN 978-86-6125-223-5.
    • Lj. Živković, B. Pešić, V. Paunović, A. Prijić, Lj. Vračar, Materials for Electronics, Exercises, Faculty of Electronic Engineering in Niš, 1998 – supplement 2002.
    • Lj. Živković, B. Pešić, V. Paunović, A. Prijić, Lj. Vračar, Materials for Electronics, Exams and Additional Problems, Faculty of Electronic Engineering in Niš, 1998 – supplement 2002.
    • Lj. Živković, B. Pešić, V. Paunović, A. Prijić, Lj. Vračar, Materials for Electronics, Laboratory Exercises, Faculty of Electronic Engineering in Niš, 1998 – supplement 2002.
  • Additionally, Dr. Ljubomir Vračar successfully designed and implemented sets of laboratory exercises for the courses Electronic Components, Sensors and Transducers, and Power Components.

Projects

  • “High-k stack capacitors for nanoscale Dynamic Random Access Memories (DRAMs)”, implemented in collaboration with the Department of Microelectronics at the Faculty of Electronic Engineering in Niš and the Institute of Solid State Physics of the Bulgarian Academy of Sciences in Sofia (2005–2007).
  • “Investigation of Interdependence in the Synthesis-Structure-Properties Triad for Functional Materials”, funded by the Ministry of Science and Environmental Protection of the Republic of Serbia (2006–2008).
  • “M2M System for Management and Supervision in Industrial Processes”, funded by the Ministry of Science and Technological Development of the Republic of Serbia (2008–2010).
  • “Development, Optimization, and Application of Self-Powered Sensor Technologies”, Project ID: TR32026, funded by the Ministry of Science and Technological Development of the Republic of Serbia.