Distant Necklace

Today, coronavirus becomes a major concern worldwide and it is important for people to take precautions in the daily routine. Besides maintain personal hygiene, we also need to keep an appropriate distance from other people in the public area such as the crowded transport system because infection in many cases is caused by bodily contact. Therefore, we've decided to launch our new device to prevent closed physical contacts called 'Distant Necklace'. It is a fashion and functional product that enable you to detect people who are trying to approach you in a very short distance. It will make a sound to notify someone is approaching and the stick attached to the device would swing to warn others to keep a distance from you.

1) Arduino UNO board

2) Ultrasonic sensor

3) BreadBoard

4) 9V battery and battery connector

5) DC male power jack

6) A buzzer-HYDZ

7) Servo

8) knitting wool

9) Paper

Code:

#define Tpin 11 #define Epin 10 //#define motor 7 #define buzz 8 #include Servo myServo; int pos = 0; int servoPin = 9; long timetaken; void setup() { pinMode(Tpin, OUTPUT); pinMode(Epin, INPUT); //pinMode(motor, OUTPUT); pinMode(buzz,OUTPUT); myServo.attach(servoPin); } void loop() { long x, dist; digitalWrite(Tpin, LOW); delayMicroseconds(20); digitalWrite(Tpin, HIGH); delayMicroseconds(10); digitalWrite(Tpin, LOW); timetaken = pulseIn(Epin, HIGH); dist = ((timetaken/2)*340)/10000; if (dist< 100) { //digitalWrite(motor,HIGH); digitalWrite(buzz,HIGH); myServo.write(90); } else { //digitalWrite(motor,LOW); digitalWrite(buzz,LOW); myServo.write(0); } delay(500);}

Reference: https://www.instructables.com/id/Glove-for-Blind/

Credits: Noah Yin, Lulu