Circuit Documentation

Summary of the Circuit

This circuit is designed to interface an Arduino UNO with a DHT11 temperature and humidity sensor and an LCD display. The LCD is used to display data read from the DHT11 sensor. A potentiometer is included to adjust the contrast of the LCD. The Arduino UNO serves as the central processing unit, controlling the data flow and display output.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13.

LCD Display (16 pin)

• Description: A 16-pin liquid crystal display for showing alphanumeric characters.
• Pins: VSS, VDD, VO, RS, R_W, E, DB0-DB7, A, K.

DHT11

• Description: A basic, ultra low-cost digital temperature and humidity sensor.
• Pins: DATA, GND, VCC.

TSR-3386UT Square Trimming Potentiometer

• Description: A variable resistor used to adjust the LCD contrast.
• Pins: Leg1, wiper, Leg2.

Wiring Details

Arduino UNO

• 5V connected to DHT11 VCC, LCD Display VDD, and Potentiometer Leg1.
• GND connected to DHT11 GND, LCD Display K, R_W, VSS, and Potentiometer Leg2.
• D2-D7 connected to LCD Display DB7-DB4, E, and RS respectively.
• D7 also connected to DHT11 DATA.

LCD Display (16 pin)

• VSS, R_W, K connected to Arduino UNO GND.
• VDD, A connected to Arduino UNO 5V.
• VO connected to Potentiometer wiper.
• RS connected to Arduino UNO D12.
• E connected to Arduino UNO D11.
• DB4-DB7 connected to Arduino UNO D5-D2 respectively.

DHT11

• DATA connected to Arduino UNO D7.
• GND connected to Arduino UNO GND.
• VCC connected to Arduino UNO 5V.

TSR-3386UT Square Trimming Potentiometer

• Leg1 connected to Arduino UNO 5V.
• wiper connected to LCD Display VO.
• Leg2 connected to Arduino UNO GND.

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 Notes

• The code provided for the Arduino UNO is a template with empty setup and loop functions. The actual implementation should initialize the LCD and DHT11 sensor, read data from the DHT11, and display it on the LCD.
• The documentation.txt file is empty and does not contain any additional information.