Author - Claudia A. Angulo

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Claudia A. Angulo	Write for Electronic Design
Claudia A. Angulo is an electronics engineering student at the Instituto Tecnologico de Mexicali, Mexicali, B.C., Mexico. Email address: alethia55@hotmail.com
1 results found for Claudia A. Angulo, displaying items 1 - 1

March 17, 2005 [Ideas For Design]
Measure Relative Humidity With A PIC MCU
A relative humidity meter can be built using a sensor with a capacitive response and a PIC microcontroller (MCU), as shown in the figure. The capacitance range of the sensor, the HS1101 from Humirel (www.humirel.com), varies from 162 to 202 pF. Functioning as an oscillator, a TLC555 CMOS timer performs the conversion from capacitance to frequency. The timer's frequency equation is given by: F = 1.44/(RA +...