4 2013-02-13 www.fritzing.org CdS photoresistor. This is a low cost way to detect light levels. Resistance decreases with more incoming light. SparkFun SKU: SEN-09088 PHOTOCELL PHOTOCELL-KIT PTH-KIT PHOTOCELL photocell-kit sparkfun Photoresistor pth-kit P$1

P$2