This circuit is based on the ARDX 09 circuit from Oomlout. It shows how the Arduino can monitor light values using a Photo Resistor and adjust a LED in response.
Start by gathering your parts together:
- 1 x Arduino Uno
- 1 x Breadboard
- 1 x LED
- 1 x 560 Ohm Resistor (Green-Blue-Brown)
- 1 x Photo Resistor
- 1 x 10K Ohm Resistor (Brown-Black-Orange)