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Lux 是一種國際的照明度單位
我們可以從wikipedia得到更多的information http://en.wikipedia.org/wiki/Lux
這邊有一張簡單的表格,整理的在不同的環境之下,所量測出來的lux值
Illuminance | Example |
---|---|
10-5 lux | Light from Sirius, the brightest star in the night sky[2] |
10-4 lux | Total starlight, overcast sky[2] |
0.002 lux | Moonless clear night sky with airglow[2] |
0.01 lux | Quarter moon |
0.2 lux | Design minimum for emergency lighting (AS2293). |
0.27 lux | Full moon on a clear night[2][3] |
1 lux | Full moon overhead at tropical latitudes[4] |
3.4 lux | Dark limit of civil twilight under a clear sky[5] |
50 lux | Family living room[6] |
80 lux | Hallway/toilet[7] |
100 lux | Very dark overcast day[2] |
320 lux | Recommended office lighting (Australia)[8] |
400 lux | Sunrise or sunset on a clear day. Well-lit office area. |
500 lux | Lighting level for an office according to the European law UNI EN 12464. |
1,000 lux | Overcast day[2]; typical TV studio lighting |
10,000–25,000 lux | Full daylight (not direct sun)[2] |
32,000–130,000 lux | Direct sunlight |
為什麼會提到lux呢?
這關係到light sensor的感測度的問題
我們可以透過類比轉數位的到我們現在環境的
這裡有一篇關於light sensor的文章
簡述了light sensor的簡易的操作運用
http://www.electronics-project-design.com/lightsensor.html
這是透過I2C Bus的讀取,來得到Chip中目前的lux值
想要了解更透徹的話,最好是連I2C Bus的觀念一起讀
若想要DIY的話,更要去K specification
浩瀚的Specification海,等你來挑戰!
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