Circuit Documentation

Summary

This project is an egg incubator system using an Arduino UNO. The system includes a DHT22 sensor to read temperature, an LCD 16x2 display to show temperature and heater status, a relay to control the heater, a stepper motor to rotate the eggs, a potentiometer to adjust the stepper motor speed, and pushbuttons to increase/decrease the target temperature and manually control the heater.

Component List

1. DHT22

   • Description: Temperature and humidity sensor
   • Pins: +, Out, -

2. 5V Relay

   • Description: Relay module for switching
   • Pins: Normally Open, Common terminal, Normally Closed, In, GND, VCC

3. LCD 16x2 (Wokwi Compatible)

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

4. LCM1602 IIC

   • Description: I2C interface for LCD
   • Pins: GND, VCC, SDA, SCL, D6, D7, A, K, VSS, VDD, V0, RS, D2, D3, D4, D5, RW, E, D0, D1, LED_A, LED_B

5. Pushbutton

   • Description: Momentary pushbutton switch
   • Pins: Pin 2, Pin 1, Pin 3, Pin 4

6. Resistor (10 Ohms)

   • Description: Resistor with 10 Ohms resistance
   • Pins: pin1, pin2

7. AC Bulb

   • Description: AC light bulb
   • Pins: P, N

8. Power Supply 12V 5AMP

   • Description: Power supply unit
   • Pins: 220V Positive Pole (AC), 220V Negative Pole (AC), GND, GND (DC), 12V-24V Output (DC)

9. 120 Fan 12V

   • Description: 12V cooling fan
   • Pins: 12V+, GND

10. Resistor (200 Ohms)

    • Description: Resistor with 200 Ohms resistance
    • Pins: pin1, pin2

11. Arduino UNO

    • Description: Microcontroller board
    • 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

12. Stepper Motor (Bipolar)

    • Description: Bipolar stepper motor
    • Pins: D, B, C, A

13. A4988 Stepper Motor Driver Carrier

    • Description: Stepper motor driver
    • Pins: ENABLE, MS1, MS2, MS3, RESET, SLEEP, STEP, DIR, GND, VCC, 1B, 1A, 2A, 2B, VMOT

14. Potentiometer

    • Description: Variable resistor
    • Pins: GND, Output, VCC

15. Electrolytic Capacitor

    • Description: Capacitor with 100 Farads capacitance
    • Pins: -, +

16. 12V Power Supply

    • Description: 12V power supply unit
    • Pins: +, -

Wiring Details

DHT22

• +: Connected to Arduino UNO 5V
• Out: Connected to Arduino UNO D5
• -: Connected to GND

5V Relay

• In: Connected to Arduino UNO D6
• GND: Connected to GND
• VCC: Connected to Arduino UNO 5V
• Normally Open: Connected to 120 Fan 12V GND and AC Bulb P
• Common terminal: Connected to Power Supply 12V 5AMP 220V Positive Pole (AC)

LCD 16x2 (Wokwi Compatible)

• VSS: Connected to LCM1602 IIC VSS
• VDD: Connected to LCM1602 IIC VDD
• V0: Connected to LCM1602 IIC V0
• RS: Connected to LCM1602 IIC RS
• RW: Connected to LCM1602 IIC RW
• E: Connected to LCM1602 IIC E
• D0: Connected to LCM1602 IIC D0
• D1: Connected to LCM1602 IIC D1
• D2: Connected to LCM1602 IIC D2
• D3: Connected to LCM1602 IIC D3
• D4: Connected to LCM1602 IIC D4
• D5: Connected to LCM1602 IIC D5
• D6: Connected to LCM1602 IIC D6
• D7: Connected to LCM1602 IIC D7
• A: Connected to LCM1602 IIC A
• K: Connected to LCM1602 IIC K

LCM1602 IIC

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

Pushbutton (Button 1)

• Pin 2: Connected to GND
• Pin 4: Connected to Arduino UNO D4
• Pin 3: Connected to Resistor (200 Ohms) pin2

Pushbutton (Button 2)

• Pin 2: Connected to GND
• Pin 4: Connected to Arduino UNO D3
• Pin 3: Connected to Resistor (200 Ohms) pin2

Pushbutton (Button 3)

• Pin 2: Connected to GND
• Pin 4: Connected to Arduino UNO D2
• Pin 3: Connected to Resistor (200 Ohms) pin2

Resistor (10 Ohms)

• pin1: Connected to Arduino UNO 5V
• pin2: Connected to Pushbutton (Button 1) Pin 3

Resistor (200 Ohms)

• pin1: Connected to Arduino UNO 5V
• pin2: Connected to Pushbutton (Button 2) Pin 3

Resistor (200 Ohms)

• pin1: Connected to Arduino UNO 5V
• pin2: Connected to Pushbutton (Button 3) Pin 3

AC Bulb

• P: Connected to 5V Relay Normally Open
• N: Connected to 120 Fan 12V 12V+ and Power Supply 12V 5AMP 220V Negative Pole (AC)

Power Supply 12V 5AMP

• 220V Positive Pole (AC): Connected to 5V Relay Common terminal
• 220V Negative Pole (AC): Connected to AC Bulb N and 120 Fan 12V 12V+

120 Fan 12V

• 12V+: Connected to AC Bulb N and Power Supply 12V 5AMP 220V Negative Pole (AC)
• GND: Connected to 5V Relay Normally Open

Arduino UNO

• D6: Connected to 5V Relay In
• D5: Connected to DHT22 Out
• D4: Connected to Pushbutton (Button 1) Pin 4
• D3: Connected to Pushbutton (Button 2) Pin 4
• A4: Connected to LCM1602 IIC SDA
• D2: Connected to Pushbutton (Button 3) Pin 4
• A5: Connected to LCM1602 IIC SCL
• 5V: Connected to A4988 Stepper Motor Driver Carrier VCC, Potentiometer VCC, DHT22 +, 5V Relay VCC, LCM1602 IIC VCC, Resistor (10 Ohms) pin1, Resistor (200 Ohms) pin1, Resistor (200 Ohms) pin1
• GND: Connected