Q2. First read the Photocell/Thermistor tutorial on the project web site. Then, modify the sketch given in that tutorial so that the sensor value read from a photocell are used an input to program a red LED such that covering the cell completely (thus, depriving it of any measurable light) turns the LED on, while flooding it with bright light makes LED turn off. This would be the idea behind an automatic light sensitive night lamp that now you can create and keep in your room. Q2. First read the Photocell/Thermistor tutorial on the project web site. Then, modify the sketch given in that tutorial so that the sensor value read from a photocell are used an input to program a red LED such that covering the cell completely (thus, depriving it of any measurable light) turns the LED on, while flooding it with bright light makes LED turn off. This would be the idea behind an automatic light sensitive night lamp that now you can create and keep in your room