Photoresistors up close and personal
Honey, I shrunk the resistor
Changing light = changing resistance
0.2 lux = emergency lighting
300 lux = sunrise
1000 lux = overcast day.
~15000 lux = full daylight
How do they work?
All colors of the rainbow work?
Where you find ‘em
ladyada.net/learn/sensors/cds.html (graphs of R vs illuminance and spectral response)
www.societyofrobots.com/schematics_photoresistor.html (pictures of Cds cells)
Tutorvista.com (atomic energy levels)