Ljubomir.Vracar@elfak.ni.ac.rs
Ljubomir.Vracar@gmail.com
Ljubomir Vračar – projects page link
Publications- link

FIELD OF INTEREST:

  • Smart City Technologies
  • Iot – Internet of Things
  • Sensors and microsensors
  • Autonomous Sensors
  • Energy Harvesting
  • Education
  • Intellectual Property
  • 3D printing

PERSONAL INFORMATION
Dr. Ljubomir Vračar was born in 1973 in Belgrade, Serbia. He completed both primary and secondary education in Požarevac with excellent academic success and was awarded the prestigious ‘Vuk’s Diploma’. During his schooling, he actively participated in federal and national competitions in computer science and electronics, achieving first place two years in a row in the federal competition for the application of computers in data acquisition.
EDUCATION
• Bachelor’s Degree: Faculty of Electronic Engineering, University of Niš. Diploma thesis titled “Failure Analysis Methods of Microelectronic Components” defended on October 18, 1999.
• Postgraduate Studies: Enrolled in 1999 at the same faculty, specializing in Microelectronics.
• Master’s Degree: Thesis titled “Automatic Electrical Characterization of Thin Gate Dielectrics in MOS Components” defended on June 12, 2009.
• PhD: Dissertation titled “Design and Implementation of Tactile and Self-Powered Microsystems” defended on November 7, 2014.
ACADEMIC CAREER
Dr. Vračar began his academic career as a Research Associate at the Faculty of Electronic Engineering in Niš (1999–2002). On March 1, 2002, he was appointed Assistant Trainee. He was elected Assistant Professor on May 31, 2016, and Associate Professor in Microelectronics and Microsystems on June 10, 2021.
PATENTS
1. Keyboard of Programmable Keys and Method for Assigning Identification Tags to Keys – RS52967B
2. Capacitive Pressure Sensor with Multilayer Dielectric – RS52973B
3. Key Manufactured in Printed Circuit Board Technology – RS52974B
4. Thermoelectric Self-Powered Device Based on Metal PCB Technology – RS55393B1
5. A New Method for Construction of Robust Switching Devices Based on PCB Technology – WO2012091594A2 (A3)
COLLABORATIONS WITH NATIONAL AND INTERNATIONAL INSTITUTIONS
Dr. Vračar has participated in professional development and research projects at the following institutions:
– Petnica Science Center, Valjevo, Serbia (2002–2007)
– Weizmann Institute of Science, Tel Aviv, Israel (2002)
– DLR Institute of Planetary Research, Berlin, Germany (2003)
– CERN, Geneva, Switzerland (2004)
– Institute of Physics, Skopje, North Macedonia (2005)
– Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria (2007)
AWARDS AND RECOGNITIONS
– PELTEH Team – 3rd prize for innovative idea (2011)
– ARMADILLO Team – 2nd prize for realized innovation (2012)
– Gold Plaque – CVET – Self-Powered Sensing System at the 5th International Innovation Exhibition, Ivanić-Grad, Croatia (2018)
– Gold Plaque – SmartLab Acquisition System at the 5th International Innovation Exhibition, Ivanić-Grad, Croatia (2018)
TEACHING ACTIVITIES
Since 2002, Dr. Vračar has been involved in practical and lab exercises in various subjects. As of his appointment as Assistant Professor, he has taught undergraduate, master’s, and doctoral courses, including:
– Undergraduate: Materials for Microelectronics, Analog Microelectronics, Sensors and Transducers, PCB Design, 3D Printing Technologies
– Master’s: Autonomous Microsystems, Microsensors and Microsystems
– Doctoral: Sensors and Transducers, Microsensors
PUBLICATIONS AND LABORATORY DEVELOPMENT
Dr. Vračar has authored several teaching materials and designed laboratory exercises for courses such as Electronic Components, Sensors and Transducers, and Power Components.
RESEARCH PROJECTS
Dr. Vračar has participated in numerous national and international research projects focused on DRAM capacitors, functional material synthesis, industrial M2M systems, and self-powered sensor technology (Project TR32026). He also contributed to curriculum innovation projects at the University of Niš.
MENTORSHIP AND ACADEMIC CONTRIBUTIONS
He is the PhD mentor to Milan Stojanović on the dissertation “Development and Application of Autonomous Sensors in Smart City Structures.” He served on the committee for Dejan Milić’s PhD defense and mentored many master’s and undergraduate theses.
COMMUNITY AND SCIENTIFIC CONTRIBUTIONS
Dr. Vračar has served as a reviewer for journals and conferences, promoted science at educational events, given invited talks, and contributed to the visibility of the Faculty of Electronic Engineering through innovation awards and public engagement. He also maintains the Department of Microelectronics website.
SCIENTIFIC METRICS
Total citations: 199, h-index: 7 (Source: Scopus, May 21, 2025; Author ID: 35565348600).