Introduction: The Distance of People

This is a simple modification to this great Instructables project:

Brief Introduction of The Original Project:

The device contains six LED bulbs in different colors, red, yellow and green. When an object approaches the LED, it lights up from green to yellow to red. There's also a speaker, and the closer the object gets, the higher the frequency of the speaker. When the led switches phase (switching from one color to another), the frequency of the speaker increases by one level.

Modifications include:

- A cardboard Case Surrounding

-The modification of distance and sound

The Board Purpose of Modification:

- The cardboard makes the device portable. This cardboard box has speakers on one side and all the LEDs on it. This design makes it easier to use.

- The distance range of the original project is too short for the normal distance between people, so I make it longer, it's more useful.

- I make the sound sounds more different, so people can know the distance more clear.


Arduino Leonardo (or Arduino Uno) x1

Cardboard box x1

Breadboard x1

HC-SRO4 Ultrasonic Sensor x1

Buzzer x1

Green LEDs x2

Yellow LEDs x2

Red LEDs x2

330-ohm Resistors x7

Power bank x1

USB cable x1

Ink x1

Writing Brush (or normal brush) x1

Tape x1

Utility Knife x1

A lot of jumper wires (Both Types: two ends with pins, one end with a pin and the other and without)

Step 1: Step 1: Materials Needed

The Materials needed for this project are:

(1x) Arduino Uno

(1x) Breadboard

(1x) HC-SRO4 Ultrasonic Sensor

(1x) Buzzer

(2x) Green LEDs

(2x) Yellow LEDs

(2x) Red LEDs

(7x) 330-ohm Resistors

A lot of jumper wires

Step 2: Step 2: Setup

This section is completely based on the original project. Information and illustration From

The photo above shows the setup of the project.

The jumper wires should be connected as follows:

Connect a jumper wire from the 5-volt pin on the Arduino to the bottom channel of the breadboard

Connect another jumper wire from a ground pin on the Arduino to the upper channel of the breadboard

Buzzer -> pin 3

(On Ultrasonic Sensor)

Echo -> pin 6

Trig -> pin 7

(In Order from Right to Left)

LED1 -> pin 8

LED2 -> pin 9

LED3 -> pin 10

LED4 -> pin 11

LED5 -> pin 12

LED6 -> pin 13

The jumper wires connected to the LEDs should be connected to the lead on the right, while the left lead of the LED should be connected to the ground channel via a 330-ohm resistor.

Step 3: Step 3: Assembly and Component Extension

Do the assembly.

Extend all components with the jump wires with two different ends as shown in the picture above.

Step 4: Step 4: Cut the Cardboard Box

Cut the box to the shape you want:

- Make sure there are holes for the Ultrasonic Sensor, the Buzzer and the LEDs.

Step 5: Step 5: Color the Cardboard Box

1. Color the surface of the written side with ink and the brush

2. Write the title on the side that is white (no color) with the writing brush

Step 6: Step 6: Assemble the Box

Assemble the box and place the components into the holes.

Step 7: Step 7: Code

Step 8: Step 8: Test

Finish !!!