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# FreeDSM (Free Dark Sky Meter)
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## This DIY photometer is part of the project [_Gaia4sustainability_](https://gaia4sustainability.eu/language/en/gaia-4-sustainability/)
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<img src="uploads/9c1fcbd76f11ced648335ca94c03ecd0/darksky.png" width="200">
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<img src="uploads/logos/darksky.png" width="200">
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The **FreeDSM** allows you to measure the quality of the sky background during your night observations. It is a photometric instrument that incorporates the Osram TSL2591 sensor, with two diodes: one will make a measurement in the infrared range and the other in the full spectrum. From the data proviced by those diodes, it calculates the mpsas measurements every minute (its range is 12-23 mpsas) but algo temperature and humidity (sensor AHT2x).
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| ... | ... | @@ -14,10 +14,10 @@ We hope you enjoy it as much as we have designing and programming it. We also th |
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## Description of the components and Do-It-Yourself process
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* [Main components](/lia2-publico/g4s/-/wikis/FreeDSM/Components)
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* [Assembly](/lia2-publico/g4s/-/wikis/FreeDSM/Assembly)
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* [Enclosure and fitting](/lia2-publico/g4s/-/wikis/FreeDSM/Enclosure)
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* [Initial firmware flashing](/lia2-publico/g4s/-/wikis/FreeDSM/Flashing)
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* [Device configuration](/lia2-publico/g4s/-/wikis/FreeDSM/Configuration)
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* [Main components](FreeDSM/Components)
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* [Assembly](FreeDSM/Assembly)
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* [Enclosure and fitting](FreeDSM/Enclosure)
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* [Initial firmware flashing](FreeDSM/Flashing)
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* [Device configuration](FreeDSM/Configuration)
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## Contact: info@gaia4sustainability.eu |
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