Arduino – Ultrasonic Sensor with LEDs and buzzer

Basically we have an Ultrasonic sensor that measures the distance and the LED’s bar graph will light up according to our distance from the sensor and as we get closer the buzzer beeps in a different way. This circuit can work as a parking sensor! It’s easy and cheap.

Parts Required

• Arduino UNO – read Best Arduino Starter Kits
• 1x 74HC595 8 Bit Shift Register
• 1x Breadboard
• 8x LEDs (for example: 3x red, 3x yellow, 2x green)
• 9x 220 Ohm Resistors
• 1x Buzzer
• 1x Ultrasonic Sensor (for exemple: HC-SR04)
• Jumper Wires

You can use the preceding links or go directly to MakerAdvisor.com/tools to find all the parts for your projects at the best price!

Schematics

Upload the Code below

Watch the video demonstration