Indiduino

An automation solution for astronomical observatories


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Cloud sensor

The Melexis MLX90614 chip.  Really it is not a cloud sensor. It is a Infra-red thermometer that can be uses for such propose. Measuring the sky temperature and comparing with ambient temperature is a good indicator of how cloudy is the sky.

 

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Humidity/Temperature sensors

The guys from http://tech.groups.yahoo.com/group/sgl_observatory_automation use Sensurion SFT11 conbine sensor to make dew heaters. See Sensirion page

http://www.sensirion.com/en/products/humidity-temperature/humidity-sensor-sht11/

Is available at http://www.adafruit.com/products/246

A good and cheaper alternative is DHT22 chip http://www.adafruit.com/products/385