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Open AccessArticle

A Modified Impedance-Frequency Converter for Inexpensive Inductive and Resistive Sensor Applications

Warsaw University of Technology, Institute of Metrology and Biomedical Engineering, 02-525 Warsaw, Poland
Sensors 2019, 19(1), 121; https://doi.org/10.3390/s19010121
Received: 4 November 2018 / Revised: 19 December 2018 / Accepted: 25 December 2018 / Published: 2 January 2019
(This article belongs to the Section Physical Sensors)
In this paper an exceptionally simple transducer is presented that is developed for experimental and custom-made sensors with inductive or resistive impedance output. It is based on a venerable 555 Integrated Circuit in a modified astable configuration. Due to single supply 5 V operation, it is directly compatible with most modern microcontroller systems, such as the popular Arduino platform. Various exemplary sensor characteristics are presented, including displacement, force, magnetic field, temperature and light sensing applications. While the transducer is not designed for high accuracy, it allows for fast and inexpensive application of various experimental sensors, such as magnetoelastic or GMI (Giant Magneto Impedance) sensors. View Full-Text
Keywords: inductive sensor; resistive sensor; transducer; Arduino inductive sensor; resistive sensor; transducer; Arduino
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Nowicki, M. A Modified Impedance-Frequency Converter for Inexpensive Inductive and Resistive Sensor Applications. Sensors 2019, 19, 121.

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