Step 1: Materials and tools
-NE555N IC chip
-two identical photoresistors (often called light dependent resistors or LDR) (I had to order these from mouser electronics)
-two identical motors
-battery case for 4 AAA batteries (or AAs. depends on how much weight your motors can take)
- printed circuit board
-bread board (for prototyping)
Materials for base:
-one piece of 1/8 inch plywood roughly 6" x 3"
-two other small pieces of scrap wood
-screws of various sizes.
-wheels (I used lego wheels)
-if you use lego wheels you will need a lego axle for two of the wheels.
-glue (gorilla glue is good if you have the patience otherwise hot glue will work.)
-hot glue gun
-drill (and bits)