Photocells are sensors that allow you to detect light. They are small, inexpensive, low-power, easy to use and don't wear out. For that reason, they often appear in toys, gadgets and appliances. They are often referred to as CDS cells (they are made of Cadmium-Sulfide), light-dependent resistors (LDR), and photoresistors.
Adjustable sensitivity Analog Photocell Brick allows you to adjust the sensitivity of analogue Photocell to get a digital signal or set a trigger value.
It's all the same use with Analog Photocell Brick.The Freaduino Sensor Shield
is the perfect shield to connect this sensor to Arduino. Or Freaduino UNO
which we had pre-stray Octopus Brick interface.