Created August 15, 2020 © MIT

Open door without touching with Arduino and Proximity Sensor

Proximity Sensor using MTCH101 controlled by Arduino Nano for motorized automatic door opening can reduce COVID-19 infection in offices .

IntermediateFull instructions provided4 hours36

Open door without touching with Arduino and Proximity Sensor

Things used in this project

Hardware components

Arduino Nano R3

MTCH101 Proximity Sensor

This sensor present in Saniabox

Story

Door handle at common door in offices is a common source of COVID-19 virus transmission. A proximity sensor can sense finger pointing from a distance of about 1 inch. This sense can be detected by Arduino Nano, which can transmit the signal wirelesslly to commercial motorized door opener. Another similar proximity sensor can be used to close the door. The circuit was built with Microchip MTCH101 on our Saniabox board ( it had the MTCH101 circuit already populated) and was tested successfully. Commercialization of this product can reduce the COVID-19 infection substantially.

Proximity Sensors detect the presence of object nearby by detecting the change in the Capacitance value. The Microchip MTCH101 integrates a single-channel capacitive proximity detection, and can work through plastic,or wood-front panel. Its sensitivity can be adjusted using on board components. An active-lowoutput will communicate state of the sensor to Arduino Nano.

The wiring diagram captures the connection between Arduino Nano and MTCH101. The TP1 is a metal piece ( Typically 1" x 1") on the PCB that will sense the presence of finger. The Sensitivity could be adjusted using R8 and R9. The Pin 4 of MTCH101 gives the output that goes to a GPIO of Arduino Nano.

The change of logic on the GPIO pin can trigger the Arduino Nano to start opening and closing of the motorized door. This will allow the door to be opened or closed.

Code

Sensing Proximity Sensor

/* Program that uses Arduino Nano and Touch Sensor from SaniaBox to 
 * light up LED when Touch Sensor is Activated. Written by
 * Abhinav Shukla V 0.02
*/

int val = 0;      // variable to store the read value

void setup() {
  pinMode(A0, INPUT);    // sets the digital pin AO as input
  pinMode(LED_BUILTIN, OUTPUT); //set up LED on Arduino Nano
}
void loop() {
  val = digitalRead(A0);   // read the input pin
  if (val == 0) { //A0 will recieve HIGH (0) if Touch Sensor is activated, LOW (1) if not
   digitalWrite(LED_BUILTIN, HIGH); //If a value of 0 is recieved, turn on LED
} else {
   digitalWrite(LED_BUILTIN, LOW);//Else turn off
   }

Credits

Vikas Shukla

1 project • 0 followers

Thanks to Abhinav Shukla.

Open door without touching with Arduino and Proximity Sensor

Things used in this project

Hardware components

Story

Schematics

Proximity Sensor Schematics

Code

Sensing Proximity Sensor

Credits

Vikas Shukla

Comments

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Open door without touching with Arduino and Proximity Sensor

Open door without touching with Arduino and Proximity Sensor

Things used in this project

Hardware components

Story

Schematics

Proximity Sensor Schematics

Code

Sensing Proximity Sensor

Credits

Vikas Shukla

Comments

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