Project 2 - Measuring distance of an object using ultrasonic sensor (HC-SR04)

Preeti madam's Embedded system live batch 12

Overview of the Project:

In this project, the implementation of code for “Measuring distance of an object using ultrasonic distance sensor (HC-SR04)

Goals:

• Measuring the distance of an object using Ultrasonic Distance Sensor (HC-SR04)
• Usage of Input Capture Mode

Key Highlights of the Project:

• Measuring the distance travelled by the wave to the object and gets bounced back from the object to sensor.
• Measuring Pulse width using Input Capture Mode

Deliverables of this project:

• The distance travelled by a wave to the object for which we want to measure the distance using Ultrasonic Distance Sensor (HC-SR04).
• Measuring Pulse width using Input Capture Mode of Timer 1

Expected Outcomes:

The students will get the Knowledge on Ultrasonic sensor (HC-SR04) to measure the distance travelled by wave to the object, the hardware connection of Atmega328p and HC-SR04 and how to use input capture mode of Timer1

Screenshot of Simulation:

• LCD screen is connected to portd of microcontroller atmega328 and rs,en pin connected with PB6,PB7 respectively.
• Ultrasonic sensor trig pin, echo pin connected to PB1, PB0 respectively.
• We can observe the signals at trig pin and echo pin in the analyzer.
• Trig pin generates the waves and PB0(input capture flag) captures the difference in raising edge anf falling edge from echo pin using timer1 function in normal mode.
• Counted signal converted to cm and shared to LCD screen and displayed.