Paso 1: partes
1 x Arduino (Uno es lo que usé) [http://www.adafruit.com/products/50]
4 x Breadboards [http://www.adafruit.com/products/64]
1 x Set de hombre/hombre Jumper cables [http://www.adafruit.com/products/758]
1 x Set de pinzas de cocodrilo [http://www.adafruit.com/products/321]
4 x IR Sensor TSOP38238 [http://www.adafruit.com/products/157]
4 x IR LEDs [http://www.adafruit.com/products/387]
Cinta (cualquier tipo de cinta es aceptable)