Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with various components including a DHT11 temperature and humidity sensor, an LCD display, a servo motor, an RTC module, a relay module, an SD card module, a 12V power supply, a bulb, and a 12V fan. The circuit is designed to read environmental data, display it, and control external devices based on the data.

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. DHT11

   • Description: A temperature and humidity sensor.
   • Pins: DATA, GND, VCC

3. LCD 16x2 (Wokwi Compatible)

   • Description: A 16x2 character LCD display.
   • Pins: VSS, VDD, V0, RS, RW, E, D0, D1, D2, D3, D4, D5, D6, D7, A, K

4. Servo

   • Description: A servo motor.
   • Pins: GND, VCC, PWM

5. RTC-DS1302

   • Description: A real-time clock module.
   • Pins: Vcc, GND, CLK, DAT, RST

6. Relay module 5v-30v

   • Description: A relay module for switching high voltage devices.
   • Pins: common contact, normally open, normally closed, trigger, V-, V+

7. 12v power supply

   • Description: A 12V power supply.
   • Pins: +, -

8. BULB

   • Description: A light bulb.
   • Pins: +, -

9. SDmodule

   • Description: An SD card module.
   • Pins: CS, SCK, MOSI, MISO, VCC, GND

10. 120 fan 12v

    • Description: A 12V fan.
    • Pins: 12V+, GND

Wiring Details

Arduino UNO

• 5V connected to:

  • DHT11 (VCC)
  • Servo (VCC)
  • RTC-DS1302 (Vcc)
  • SDmodule (VCC)
  • Relay module 5v-30v (V+)
  • LCD 16x2 (Wokwi Compatible) (VDD, A)

• GND connected to:

  • Servo (GND)
  • DHT11 (GND)
  • RTC-DS1302 (GND)
  • SDmodule (GND)
  • Relay module 5v-30v (V-)
  • LCD 16x2 (Wokwi Compatible) (VSS, RW, K)
  • 12v power supply (-)
  • BULB (-)
  • 120 fan 12v (GND)

• A4 connected to:

  • RTC-DS1302 (DAT)

• A5 connected to:

  • RTC-DS1302 (CLK)

• D13 connected to:

  • SDmodule (SCK)

• D12 connected to:

  • SDmodule (MISO)
  • LCD 16x2 (Wokwi Compatible) (RS)

• D11 connected to:

  • SDmodule (MOSI)
  • LCD 16x2 (Wokwi Compatible) (E)

• D10 connected to:

  • SDmodule (CS)

• D9 connected to:

  • Servo (PWM)

• D8 connected to:

  • Relay module 5v-30v (trigger)

• D7 connected to:

  • Relay module 5v-30v (trigger)

• D6 connected to:

  • RTC-DS1302 (RST)

• D5 connected to:

  • LCD 16x2 (Wokwi Compatible) (D4)

• D4 connected to:

  • LCD 16x2 (Wokwi Compatible) (D5)

• D3 connected to:

  • LCD 16x2 (Wokwi Compatible) (D6)

• D2 connected to:

  • LCD 16x2 (Wokwi Compatible) (D7)
  • DHT11 (DATA)

DHT11

• VCC connected to:

  • Arduino UNO (5V)

• GND connected to:

  • Arduino UNO (GND)

• DATA connected to:

  • Arduino UNO (D2)

LCD 16x2 (Wokwi Compatible)

• VDD connected to:

  • Arduino UNO (5V)

• A connected to:

  • Arduino UNO (5V)

• VSS connected to:

  • Arduino UNO (GND)

• K connected to:

  • Arduino UNO (GND)

• RW connected to:

  • Arduino UNO (GND)

• RS connected to:

  • Arduino UNO (D12)

• E connected to:

  • Arduino UNO (D11)

• D4 connected to:

  • Arduino UNO (D5)

• D5 connected to:

  • Arduino UNO (D4)

• D6 connected to:

  • Arduino UNO (D3)

• D7 connected to:

  • Arduino UNO (D2)

Servo

• VCC connected to:

  • Arduino UNO (5V)

• GND connected to:

  • Arduino UNO (GND)

• PWM connected to:

  • Arduino UNO (D9)

RTC-DS1302

• Vcc connected to:

  • Arduino UNO (5V)

• GND connected to:

  • Arduino UNO (GND)

• DAT connected to:

  • Arduino UNO (A4)

• CLK connected to:

  • Arduino UNO (A5)

• RST connected to:

  • Arduino UNO (D6)

Relay module 5v-30v

• V+ connected to:

  • Arduino UNO (5V)

• V- connected to:

  • Arduino UNO (GND)

• trigger connected to:

  • Arduino UNO (D8, D7)

• common contact connected to:

  • BULB (+)

• normally open connected to:

  • 12v power supply (+)
  • 120 fan 12v (12V+)

12v power supply

• + connected to:

  • Relay module 5v-30v (normally open)

• - connected to:

  • Arduino UNO (GND)

BULB

• + connected to:

  • Relay module 5v-30v (common contact)

• - connected to:

  • Arduino UNO (GND)

SDmodule

• VCC connected to:

  • Arduino UNO (5V)

• GND connected to:

  • Arduino UNO (GND)

• SCK connected to:

  • Arduino UNO (D13)

• MISO connected to:

  • Arduino UNO (D12)
  • LCD 16x2 (Wokwi Compatible) (RS)

• MOSI connected to:

  • Arduino UNO (D11)
  • LCD 16x2 (Wokwi Compatible) (E)

• CS connected to:

  • Arduino UNO (D10)

120 fan 12v

• 12V+ connected to:

  • Relay module 5v-30v (normally open)

• GND 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:

}

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 Arduino UNO microcontroller.