Make Touchless ANY THING using ultrasonic sensor module

In this condition of COVid-19, we should avoid touching like Doorbell or anything so in this project to make anything Touchless/NON-contact

BeginnerFull instructions provided6,532

Make Touchless ANY THING using ultrasonic sensor module

Things used in this project

Hardware components

Arduino UNO

Ultrasonic Sensor - HC-SR04 (Generic)

Relay (generic)

Jumper wires (generic)

Breadboard (generic)

Hand tools and fabrication machines

Soldering iron (generic)

Hot glue gun (generic)

Story

How you can make anything Touchless/NON-contact:

just add the Component Or Thing you want to turn ON in series with the power supply Or Battery:

For Example:

Touchless Doorbell

Social distancing is one of the best methods to escape from COVID-19. I strongly recommend staying at home. But we can't avoid some emergency visits to some homes. When we arrived in front of a house, first we search the doorbell button/ calling bell button. And press the button. But in this special situation, this doorbell button can cause the virus to spread. When some infected person presses the button the virus holds on that button and when a non-infected person touches this button the virus spreads to that person. We can avoid this danger by using the touchless doorbell. The existing doorbell can convert to a touchless doorbell.

Hand Sanitizer

you can also use it in public sanitizers just add a 12v or 6v pump on its output and when you take your hand below the ultrasonic sensor the pumps starts and the sanitizer drops on to your hand then you sanitized your hand and protected from the COVID19.

now it's on you so you can make anything to get protected, show me your creativity and tag me on my twitter @ManiaCircuit

"Soguysifyoulike the project so don't forget to follow and like it" and subscribe my youtube channel

Full Video

Schematics;

I made it permanent on the perf board:

Code

CODE:

//this project is made by Circuit Mania  
//https://www.youtube.com/channel/UCJPKa558LvFFYOL3zfEmJ9g?view_as=subscriber
const int pingPin = 7;
//adjust this to set the min speed of wave gesture
const int waveBackWait = 5000;
//Range of detection from the sensor in cm
const int range = 7;
void setup() {
  pinMode(10, OUTPUT);
}
void loop() {
  long duration, cm;
  pinMode(pingPin, OUTPUT);
  digitalWrite(pingPin, LOW);
  delayMicroseconds(2);
  digitalWrite(pingPin, HIGH);
  delayMicroseconds(5);
  digitalWrite(pingPin, LOW);
pinMode(pingPin, INPUT);
  duration = pulseIn(pingPin, HIGH);
  
  cm = microsecondsToCentimeters(duration);
if(cm < range && cm > 1){
    for(int i=waveBackWait; i>0; i--){
      long new_duration, new_cm;
      pinMode(pingPin, OUTPUT);
      digitalWrite(pingPin, LOW);
      delayMicroseconds(2);
      digitalWrite(pingPin, HIGH);
      delayMicroseconds(5);
      digitalWrite(pingPin, LOW);
      pinMode(pingPin, INPUT);
      new_duration = pulseIn(pingPin, HIGH);
  
      new_cm = microsecondsToCentimeters(new_duration);
      if(new_cm < range && new_cm > 1){
        //ring the doorbell
        digitalWrite(10,HIGH);
        delay(500);
        digitalWrite(10,LOW);
      }
    }
  }
}
long microsecondsToCentimeters(long microseconds) {
  return microseconds / 29 / 2;
}

Make Touchless ANY THING using ultrasonic sensor module