Circuit Documentation

Summary

This circuit is designed to interface an Arduino UNO with a DHT11 Humidity and Temperature Sensor and a 16x2 I2C LCD display. The Arduino UNO is powered by a 9V battery. The DHT11 sensor measures the humidity and temperature, and the data is displayed on the 16x2 I2C LCD.

Component List

1. Arduino UNO

   • Description: A microcontroller board based on the ATmega328P.
   • Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

2. 9V Battery

   • Description: A standard 9V battery used to power the Arduino UNO.
   • Pins: -, +

3. DHT11 Humidity and Temperature Sensor

   • Description: A sensor used to measure humidity and temperature.
   • Pins: VDD, DATA, NULL, GND

4. 16x2 I2C LCD

   • Description: A 16x2 character LCD display with I2C interface.
   • Pins: GND, VCC, SDA, SCL

Wiring Details

Arduino UNO

• 3.3V: Connected to VDD of DHT11 Humidity and Temperature Sensor
• 5V: Connected to VCC of 16x2 I2C LCD
• GND: Connected to GND of 16x2 I2C LCD, GND of DHT11 Humidity and Temperature Sensor, and - of 9V Battery
• Vin: Connected to + of 9V Battery
• A4: Connected to SDA of 16x2 I2C LCD
• A5: Connected to SCL of 16x2 I2C LCD
• D11: Connected to DATA of DHT11 Humidity and Temperature Sensor

9V Battery

• -: Connected to GND of Arduino UNO
• +: Connected to Vin of Arduino UNO

DHT11 Humidity and Temperature Sensor

• VDD: Connected to 3.3V of Arduino UNO
• DATA: Connected to D11 of Arduino UNO
• GND: Connected to GND of Arduino UNO

16x2 I2C LCD

• VCC: Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO
• SDA: Connected to A4 of Arduino UNO
• SCL: Connected to A5 of Arduino UNO

Documented Code

Arduino UNO Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Documentation (documentation.txt)

This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and the code used in the microcontroller.