SMART TIFFIN

A smart tiffin box utilizing a DHT11 sensor, Peltier module, and Arduino is designed to maintain and monitor the temperature inside the tiffin to ensure food remains fresh and safe to eat.

· DHT11 Sensor: This sensor measures temperature and humidity inside the tiffin box. It provides real-time data to Arduino, allowing the system to monitor the environment and adjust as needed.

· Peltier Module: The Peltier module acts as a thermoelectric cooler/heater. It can cool down or heat up the interior of the tiffin box based on the temperature readings from the DHT11 sensor.

· Arduino Microcontroller: Arduino serves as the brain of the system, processing data from the DHT11 sensor and controlling the Peltier module. It regulates the temperature inside the tiffin box to maintain optimal conditions for food preservation.

Functionality:

The smart tiffin box works as follows:

1. Temperature Monitoring: The DHT11 sensor continuously monitors the temperature inside the tiffin box. If the temperature rises above a set threshold, indicating food might spoil, the Arduino activates the Peltier module.

2. Cooling/Heating: Depending on the temperature reading, the Arduino adjusts the Peltier module to either cool or heat the interior. This helps maintain the desired temperature range suitable for storing food safely.

3. User Interaction: Users can set temperature preferences or monitor current conditions using a display connected to the Arduino, or through a mobile app via Bluetooth or Wi-Fi module (if integrated).

4. Power Management: Efficient power management ensures that the system operates effectively without draining excessive battery power, typically using a rechargeable battery or a power adapter.

Benefits:

· Food Safety: Ensures that food remains fresh and safe for consumption by controlling the internal temperature.

· Convenience: Provides users with peace of mind knowing their food is stored at optimal conditions.

· Customizable: Users can adjust settings based on their specific food storage needs, such as different temperature requirements for various types of dishes.

Applications:

· Daily Use: Ideal for individuals carrying packed meals to work or school, ensuring food quality throughout the day.

· Healthcare: Useful in healthcare settings to store medications or special dietary meals that require precise temperature control.

· Outdoor Activities: Suitable for picnics, camping, or any outdoor activities where maintaining food freshness is crucial.

Conclusion:

The smart tiffin box using DHT11 and a Peltier module with Arduino demonstrates how technology can enhance food storage and safety in everyday scenarios. By leveraging temperature sensing and control capabilities, it provides a practical solution for maintaining optimal food conditions conveniently and effectively.

CIRCUIT DIAGRAM

CODE

#include <IRremote.h>
#define irPin A0
IRrecv irrecv(irPin);
decode_results results;
#define r1 1
int relay1 = LOW;
#define r2 2
int relay2 = LOW;
#define r3 3
int relay3 = LOW;
#define r4 4
int relay4 = LOW;
void setup()
{
  Serial.begin(19200);
irrecv.enableIRIn();
pinMode(r1, OUTPUT);
pinMode(r2, OUTPUT);
pinMode(r3, OUTPUT);
pinMode(r4, OUTPUT);
}
void loop() {
if (irrecv.decode(&results)) {
  Serial.println(results.value);
switch (results.value) {
case 33441975 :
digitalWrite(r1,LOW);
digitalWrite(r2,LOW);
digitalWrite(r3,LOW);
digitalWrite(r4,LOW); //all off
delay(100);
break;
case 33444015:
relay1 = ~ relay1;
digitalWrite(r1,relay1);//r1 on
delay(100);
break;
case 33478695:
relay2 = ~ relay2;
digitalWrite(r2,relay2);//r2 on
delay(100);
break;
case 33486855:
relay3 = ~ relay3;
digitalWrite(r3,relay3);//r3 on
delay(100);
break;
case 33435855:
relay4 = ~ relay4;
digitalWrite(r4,relay4);//r4 on
delay(100);
break;
}
irrecv.resume();
}
}