I get this video from youtube... This is how to make a simple light sensor...
The thing you need to make this sensor are :
- LDR ( Light Dependent Resistor )
- LED ( Light Emitting Diode )
- 1K Ohm Resistor (Or, A 330 Ohm Resistor )
- 9V Battery
- 9V Battery Clip
I hope this video can provide useful guidance to you all