“Sense Your Back” T-shirt by Christine

I used the Lilypad, five LEDs and a buzzer as well as a proximity sensor to make this T-shirt which has the function that if somebody is coming closer from the back, the sensor will get that and make those LEDs light up one by one and the buzzer will make a sound when the distance is very close. This is sort of like to inform the wearer of the person or the object behind.