Step Back - Specifications
- LDRs (photo resistors);
- an arduino board;
- laser pointers.
LEDs are parallelly connected. The ground wire is connected to the digital ground of the arduino board,
while each of the positive (+) wire is connected to the digital pins. There are 3 boxes, each with 9
LEDs embedded. Each box will have a cable that connects to an analog pin and all the 3 boxes should
be connected to 5 volts and grounded.