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• A measurement method for capacitive sensors based on a versatile direct sensor-to-microcontroller interface circuit

  Publikacja

  • Z. Czaja

  - MEASUREMENT - Rok 2020

  In the paper, there is presented a new time-domain measurement method for determining the capacitance values of capacitive sensors, dedicated, among others, to capacitive relative humidity sensors. The method is based on a versatile direct sensor-to-microcontroller interface for microcontrollers with internal analog comparators (ACs) and with precision voltage reference sources, e.g. digital-to-analog converters (DACs). The reference...

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• A measurement method for lossy capacitive relative humidity sensors based on a direct sensor-to-microcontroller interface circuit

  Publikacja

  • Z. Czaja

  - MEASUREMENT - Rok 2021

  A new time-domain measurement method for determining the capacitance and resistance values of lossy relative humidity capacitive sensors is presented. The method is based on a direct sensor-to-microcontroller interface for microcontrollers with internal analog comparators and timers. The interface circuit consists only of four reference resistors (two reference resistors if a microcontroller includes a voltage reference source),...

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