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temp/humidity sensor

Avatar Posted by C.P.Kamhoot at

Hi,

Did someone ever  try to make a temperature and humidity sensor using a PIC controler ?

Need a temp of 100 degF. / 38,2 degC  and humidity between 50 and 80% . It is for an Egg-incubator. By low humidity it has to add moisture, by high humidity it has to ventilate.

Humidity level depends on temperature, the best way is to use a memory table to check the correct levels.

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    Posted by Boss at

    Have a look at http://www.sensirion.com/en/01_humidity_sensors/00_humidity_sensors.htm

    My understanding is that these give out RH% for that actual air temperature.

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    Posted by pauljclarke at

    Hi,

    Agree with 'Boss' in looking at Sensirion.

    Would suggest questioning why use a PIC when there are so many Arduino projects and examples out there.

    I would answer your question by saying YES... people have done this, but question what are you really looking for?

    Paul

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    Posted by windraider at

    If you visit my site www.sustainabilitymeasurement.com you can download the free ThermoSoft Mk1 Software.  To use it you will need a Maxim USB to 1wire convertor and Two DS18B20 1 wire  temperature sensors. These sensors are accurate and matched.  To get Relative Humidity you could use 1 temperature sensor  as the Dry Reading and the other as the wet reading. The difference gives you Relative Humidity.

    ThermoSoft Mk1 lets you save thr two temeratures in a format which can be read by a spresdsheet program.

    RS I expect can supply you the componets better than me ------ I hope to adapt ThermoSoft Mk1 along the lines you may need so your feedback would be of interest and I would help where I could contribute--

     

    regards

     

    ANDY

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