No libraries will be used in this project. First define trig and echo pin of HC-SR04 in the program. In this project the trig pin is connected to GPIO9 and echo pin is connected to GPIO10 of Arduino ...

Fig. 1: Pin details of ATmega32 Fig. 2: Author’s prototype on the board Pinout of ATmega32 as used in Arduino board Thirty two digital pins (D0 to D31) Eight analogue-to-digital pins (A0 to A7); these ...