Arnov Sharma
Published © CC BY-NC-SA

Yet Another Solenoid Valve Based SANITIZER DISPENSER

3D Printed and easy to Replicate "Fluid Dispenser for alcohol-based sanitizer".

BeginnerFull instructions provided10 hours3,437
Most Practical - US Based Project
2020 China-US Young Maker Competition

Things used in this project

Hardware components

solenoid valve
×1
ATtiny85
Microchip ATtiny85
×1
Proximity Sensor
Proximity Sensor
×1
Ultrasonic Sensor - HC-SR04
SparkFun Ultrasonic Sensor - HC-SR04
×1
UTSOURCE Electronic Parts
UTSOURCE Electronic Parts
×1
Arduino UNO
Arduino UNO
×1
JLCPCB Customized PCB
JLCPCB Customized PCB
×1
Arduino UNO
Arduino UNO
×1

Software apps and online services

Arduino IDE
Arduino IDE

Hand tools and fabrication machines

3D Printer (generic)
3D Printer (generic)

Story

Read more

Custom parts and enclosures

container lid

container

lid of lid

wall mount bracket

Schematics

SCH for PCB

Code

code for ultrasonic sensor

C/C++
int trigPin = 11; 
int echoPin = 10; 

int SOL = 13; //solenoid

void setup()
{  
pinMode(trigPin, OUTPUT); //Sensor
pinMode(echoPin, INPUT); //Sensor  
pinMode(SOL, OUTPUT);
Serial.begin(9600);
} 
void loop(){
  

long duration, distance;
 digitalWrite(trigPin, LOW);
 delayMicroseconds(2);
 digitalWrite(trigPin, HIGH);
 delayMicroseconds(5);
 digitalWrite(trigPin, LOW);
 duration = pulseIn(echoPin, HIGH);
 distance = (duration/2) / 29.1;
 Serial.print ("cm ");
 Serial.print (distance);



if (distance < 10)
{
  digitalWrite(SOL,HIGH);
}
else
  {
    //Serial.println("CLEAR");
    digitalWrite(SOL,LOW);

      }

  delay(200);
}

code for Proximity sensor

C/C++
int SOL = 0; 
int SENSOR = 1;

int isObstacle = 0;  

void setup() {
  pinMode(SOL, OUTPUT);
  pinMode(SENSOR, INPUT);

  //Serial.begin(9600);
  
}

void loop() {
  isObstacle = digitalRead(SENSOR);
  if (isObstacle == LOW)
  {
    //Serial.println("SOMETHING IS PASSING");
    digitalWrite(SOL,HIGH);

  }
  else
  {
    //Serial.println("CLEAR");
    digitalWrite(SOL,LOW);

      }

  delay(200);
  

}

Credits

Arnov Sharma

Arnov Sharma

308 projects • 306 followers
Just your average MAKER

Comments

Awards
Most Practical - US Based Project
2020 China-US Young Maker Competition
Related channels and tags
  • COVID-19
  • Home Automation
  • JLCPCB
  • Microchip
  • Sensors
  • SparkFun
  • UTSOURCE