Photocell
- What it does?
This is a light sensor that changes resistance in a circuit depending on how much light it is exposed to. The Photocell produces a resistance of 8-20 kΩ under normal light. The resistance can drop to near 0Ω by shining an LED near it.
- Ways to connect it to a Arduino?
The Photocell is basically a resistor so it can be connected through digital and analog pins.
- Fritzing schematic.
- Library required to run the photocell.
The photocell can be run using the Serial library using the AnalogRead function.
Serial is used for communication between the Arduino board and a computer or other devices. All Arduino boards have at least one serial port. It communicates on digital pins 0 and 1 as well as with the computer via USB. Thus, if you use these functions, you cannot also use pins 0 and 1 for digital input or output.
