Description: The parktronic system is made to help drivers to park in reverse or for signal if there is something behind them. It only works when the car is on reverse. ItТs really useful because can warn you if there is object behind you. It prevents accidents. I made a parktronic system with the help of Arduino board. I used us-020 ultrasonic sensor, ld-bzpn-2312 for sound signal and 2 LEDs ( green and red ). I made and tested the system in laboratory and it works