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Portable Luxmeter

This project is about making portable luxmeter. It can be used in schools, where children can measure different kinds of light sources.
1. measure intensity of light in lux.
2. calculate solar irradiation from lux to watts/m2 (factor 112)
3. charging battery using USB port
Total cost is around 13 $ without case. Luxmeter take 15 mA, so it will works long time on one Li-Ion battery.”

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