Near Field Communications (NFC) technology is becoming a basic requirement by the users of smartphones mainly because of its use for wireless payment systems. This work tries to deepen into further uses for this technology by presenting a colour sensor embedded on a battery-free NFC tag. The tag is composed by an NFC IC, a microcontroller, and a colour sensor. Using NFC brings two main advantages, the first is the capability of using the magnetic field generated by the reader to supply the energy to the tag’s circuitry after rectifying it. The second is, in contrast with other RFID technologies, the use of a commercial smartphone as a reader. Thus, NFC makes possible the design of battery-less tags which can be read by a smartphone that can be used as a bridge to send the data to the cloud, turning NFC into a viable technology for certain applications in the Internet of Things (IoT) scenario. Two applications are presented to demonstrate the potentiality of this low-cost prototype, one to estimate the pH from a microfluidic paper-based colour determination, and the other to measure the ripeness of fruits.
Track
Sensors: Sensors, Sensor Networks, and Applications
Conference
1st Mosharaka International Conference on Emerging Applications of Electrical Engineering (MIC-ElectricApps 2020)
Congress
2020 Global Congress on Electrical Engineering (GC-ElecEng 2020), 4-6 September 2020, Valencia, Spain
Pages
--1
Topics
Design and Deployment of Sensor Systems Wireless Body Area Sensor Networks
ISSN
2227-331X
DOI
BibTeX
@inproceedings{1149ElecEng2020,
title={NFC Battery-Less Colour Sensor and its Applications},
author={Martí Boada, and Antonio Lazaro, and Ramón Villarino, and David Girbau},
booktitle={2020 Global Congress on Electrical Engineering (GC-ElecEng 2020)},
year={2020},
pages={--1},
doi={}},
organization={Mosharaka for Research and Studies}
}
