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<p>This paper presents a novel and cheap electronic version of wet and dry temperature hygrometer The instrument is centered around a 555 timer, operated in astable multivibrator mode. Two thermistors with negative temperature coefficients (NTC) serve as the two timing resistors of the multivibrator. These thermistors are used to sense the dry and wet temperatures. The durations of the ‘HIGH’ and ‘LOW’ levels of the multivibrator output are detected and these values are used to predict the relative humidity and ambient temperature by an appropriately trained Artificial Neural Network (ANN). The performance of the arrangement has been evaluated by numerical simulation studies using thermistor data from manufacturer’s table. Significantly good results have been obtained.</p>
</abstract>

This paper presents a novel and cheap electronic version of wet and dry temperature hygrometer The instrument is centered around a 555 timer, operated in astable multivibrator mode. Two thermistors with negative temperature coefficients (NTC) serve as the two timing resistors of the multivibrator. These thermistors are used to sense the dry and wet temperatures. The durations of the ‘HIGH’ and ‘LOW’ levels of the multivibrator output are detected and these values are used to predict the relative humidity and ambient temperature by an appropriately trained Artificial Neural Network (ANN). The performance of the arrangement has been evaluated by numerical simulation studies using thermistor data from manufacturer’s table. Significantly good results have been obtained.

Simulation Studies on a New Intelligent Scheme For Relative Humidity And Temperature Measurement Using Thermistors in 555 Timer Circuit

International Journal on Smart Sensing and Intelligent Systems

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

This paper presents a novel and cheap electronic version of wet and dry temperature hygrometer The instrument is centered around a 555 timer, operated in...

Simulation Studies on a New Intelligent Scheme For Relative Humidity And Temperature Measurement Using Thermistors in 555 Timer Circuit

Published Online: Dec 12, 2017

Page range: 217 - 229

DOI: https://doi.org/10.21307/ijssis-2017-389

Keywords
ANN Linearizer, 555 timer, Relative Humidity, Thermistor

© 2010 Debangshu Dey et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Simulation Studies on a New Intelligent Scheme For Relative Humidity And Temperature Measurement Using Thermistors in 555 Timer Circuit

Published Online: Dec 12, 2017

Page range: 217 - 229

DOI: https://doi.org/10.21307/ijssis-2017-389

KeywordsANN Linearizer, 555 timer, Relative Humidity, Thermistor

© 2010 Debangshu Dey et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
ANN Linearizer, 555 timer, Relative Humidity, Thermistor