tutorials:learn:sensors:cds.html
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tutorials:learn:sensors:cds.html [2010/10/07 19:15] daigo |
tutorials:learn:sensors:cds.html [2016/01/28 18:05] (current) |
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| ***Size: **Round, 5mm (0.2") diameter. (Other photocells can get up to 12mm/0.4" diameter!) | ***Size: **Round, 5mm (0.2") diameter. (Other photocells can get up to 12mm/0.4" diameter!) | ||
| ***Price:** [[http://www.adafruit.com/index.php?main_page=product_info&cPath=35&products_id=161|$1.00 at the Adafruit shop]] | ***Price:** [[http://www.adafruit.com/index.php?main_page=product_info&cPath=35&products_id=161|$1.00 at the Adafruit shop]] | ||
| - | ***Resistance range: **200KΩ (dark) to 10KΩ (10 lux brightness) | + | ***Resistance range: **200K Ω (dark) to 10KΩ (10 lux brightness) |
| ***Sensitivity range:** CdS cells respond to light between 400nm (violet) and 600nm (orange) wavelengths, peaking at about 520nm (green). | ***Sensitivity range:** CdS cells respond to light between 400nm (violet) and 600nm (orange) wavelengths, peaking at about 520nm (green). | ||
| ***Power supply:** pretty much anything up to 100V, uses less than 1mA of current on average (depends on power supply voltage) | ***Power supply:** pretty much anything up to 100V, uses less than 1mA of current on average (depends on power supply voltage) | ||
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| |**300 - 500 lux**|Sunrise or sunset on a clear day. Well-lit office area.| | |**300 - 500 lux**|Sunrise or sunset on a clear day. Well-lit office area.| | ||
| |**1,000 lux**|Overcast day; typical TV studio lighting| | |**1,000 lux**|Overcast day; typical TV studio lighting| | ||
| - | |**10,000–25,000 lux**|Full daylight (not direct sun)| | + | |**10,000 - 25,000 lux**|Full daylight (not direct sun)| |
| - | |**32,000–130,000 lux**|Direct sunlight| | + | |**32,000 - 130,000 lux**|Direct sunlight| |
| ==== Testing your photocell ==== | ==== Testing your photocell ==== | ||
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