HC-SR04 Ultrasonic Distance Sensor and Buzzer Usage

In this application, we will make a parking sensor application using HC-SR04 Ultrasonic Distance Sensor and Buzzer.

A list of materials:

1-Arduino Uno

2-BreadBoard

3-1 Buzzers

4-1 x HC-SR04 Ultrasonic Distance Sensor

5-Jumper Cables

We need your supplies.

We connect the long leg of Buzzer, which we added to our breadboard, with the jumper cable to the digital pin 10 in our ardunio uno material. We connect the short leg of the buzzer to the GND (negative) terminal of the Ardunio Uno with a jumper cable. HC-SR04 Ultrasonic Distance Sensor has 4 legs. We connect the leg that says VCC to 5V with a cable. I connected the leg that says Trigger to digital pin 9, the leg that writes Echo to digital pin 8, and the leg that writes GND to the GND terminal. The circuit diagram is given below.

HC-SR04 Ultrasonic Distance Sensor and Buzzer Usage mblock and arduino

Code Part:

HC-SR04 Ultrasonic Distance Sensor and Buzzer Usage

In the Mblock program, we add the Arduino program starter code from the Robots menu. After adding the forever code from the control menu, we create a variable called Distance from the data menu to show us the distance inside. We add this code from the data menu. In the inner part of this code, we take the code that will read the values on the ultrasonic and trigger pin that we connect to the digital pins on the distance sensor and will take these values and put it into the distance variable. Thus, we assign the values measured by the sensor to the distance sensor. In order to print this value, we can see the value measured by the sensor on the screen by putting the distance variable into the code to write hello to the serial port. For this, of course, we need to choose the char mode, not the binary. Then we will compare with the code if it is. If the measured distance is less than 20, the buzzer will start to sound. We have connected the buzzer to digital pin number 10. This will be repeated every 0.1 second. After selecting Arduino Uno (or choose which board you are using) from the cards menu, select the Arduino mode from the Edit menu and press the Upload to Arduino button, send the codes we have written to our Arduino board and upload them. we will be. Thus, our program becomes ready to run.

To download the source code of the program CLICK HERE

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