Original article Investigation of electrical performances of textile conductive lines under different connector configurations and external influences Lazar Mili c , Dejan Movrin, Mitar Simi c, Varun Jeoti and Goran M. Stojanovi c Abstract As textile electronics has undergone a boom in the past few decades, especially the sensing aspect, methods of modular connectivity of these components with classical electrical components and printed circuit boards must be broadened. This study focuses on the aforementioned problem, as well as testing the electrical properties of conductive textile lines through a series of experiments. Fabrication of the conductive structure was done in two parts: embroidery of the conductive threads onto cloths, as well as designing and three-dimensional printing of connectors that will be used for bridging and making a stable connection with pin-based systems. A valid connection between the textile endings and pins has not yet been tested, and is the main focus of this paper, aside from testing outside influences on the designed textile structure. Afterwards, the developed prototype was tested through a realistic scenario that consisted of body temper- ature validations and the application of artificial sweat, as well as the quantification of the effects of washing on the electrical properties of the device. The outcome shows changes in the impedance modulus after washing. However, after application of artificial sweat, the nature of the parallel wire connections changes significantly, as the sweat acts as a resistive contact between the two wires. This examination can contribute to the field of wearable electronics through the proposed elements (conductive lines and connectors) of future electronic circuits in the concept of internet of bodies. Keywords Conductive threads, connectors, textile electronics, three-dimensional printing, fabrication, weaving With the emergence of textile electronics, or e-textiles, and their spread into day-to-day life and diagnostics, through the concepts of the Internet of Things (IoT) and Internet of Bodies, 1,2 major research has been directed into making sensors and other components as least noticeable as possible on e-textiles. 3 Much research in previous years has been focused on adapting different sensors to the human body through textile electronics. For example, extensive research and characterization was done for monitoring muscle contractions. 4 Moreover, cotton braiding inter- woven with conductive thread was used for perspira- tion monitoring by integrating it in an undershirt. 5 Aside from implementation in sensorics, energy har- vesting has been integrated as well. 6 As microelectronic components play a vital role in collecting significant data, crucial parts of each electronics system are inter- connecting conductive lines, which are used to bridge the gap between electronic components. 3 For signal propagation, depending on the frequency range, different types of conductive lines are used. When it comes to transmitting radio frequency (RF) waves, which are in the range of kHz to GHz, as well as microwaves, transmission lines are generally used. Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovica, Novi Sad, Serbia Corresponding author: Lazar Mili  c, Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovica 6, Novi Sad 21000, Serbia. Email: lmilic@uns.ac.rs Textile Research Journal 0(0) 1–14 ! The Author(s) 2022 Article reuse guidelines: sagepub.com/journals-permissions DOI: 10.1177/00405175221145553 journals.sagepub.com/home/trj