Circuit Documentation

Summary

This circuit is designed using an Arduino Mega 2560 microcontroller to interface with various components including LEDs, pushbuttons, a rotary potentiometer, a DHT11 sensor, an LCD display, a water level sensor, a DS1307 RTC module, a stepper motor, a DC motor, and a motor driver. The circuit is powered using an MB102 Breadboard Power Supply Module.

Component List

1. MB102 Breadboard Power Supply Module 3.3V/5V

   • Pins: VCC, GND, 3.3V, 5V
   • Description: Provides regulated 3.3V and 5V power supply.

2. Arduino Mega 2560

   • Pins: IOREF, RESET, 3V3, 5V, GND, VIN, A0-A15, D0-D53, AREF, SDA, SCL
   • Description: Microcontroller board based on the ATmega2560.

3. LCD Display (16 pin)

   • Pins: VSS, VDD, VO, RS, R_W, E, DB0-DB7, A, K
   • Description: 16x2 character LCD display.

4. Potentiometer

   • Pins: GND, Output, VCC
   • Description: Variable resistor used to adjust voltage.

5. Resistor (220 Ohms)

   • Pins: pin1, pin2
   • Description: Fixed resistor with 220 Ohms resistance.

6. Pushbutton

   • Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)
   • Description: Momentary pushbutton switch.

7. Resistor (330 Ohms)

   • Pins: pin1, pin2
   • Description: Fixed resistor with 330 Ohms resistance.

8. LED: Two Pin (green)

   • Pins: cathode, anode
   • Description: Green LED.

9. LED: Two Pin (red)

   • Pins: cathode, anode
   • Description: Red LED.

10. LED: Two Pin (yellow)

    • Pins: cathode, anode
    • Description: Yellow LED.

11. LED: Two Pin (blue)

    • Pins: cathode, anode
    • Description: Blue LED.

12. Rotary Potentiometer

    • Pins: leg1, wiper, leg2
    • Description: 10k Ohms rotary potentiometer.

13. 28BYJ-48 Stepper Motor

    • Pins: BLUE, PINK, YELLOW, ORANGE, RED
    • Description: 5V stepper motor.

14. Water Level Sensor

    • Pins: SIG, VCC, GND
    • Description: Water level detection sensor.

15. DS1307 RTC (Wokwi Compatible)

    • Pins: GND, 5V, SDA, SCL, SQW
    • Description: Real-time clock module.

16. DHT11

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

17. l293d motor driver

    • Pins: enable 1, input 1, output 1, gnd, output 2, input 2, vs, vss, input 4, output 4, output 3, input 3, enable 2
    • Description: Dual H-Bridge motor driver IC.

18. DC Motor

    • Pins: pin 1, pin 2
    • Description: DC motor.

19. ULN 2003

    • Pins: IN1-IN7, GND, +, COIL1-COIL5
    • Description: Darlington transistor array.

Wiring Details

MB102 Breadboard Power Supply Module 3.3V/5V

• VCC: Connected to VCC of ULN 2003 and l293d motor driver.
• GND: Connected to GND of multiple components including Arduino Mega 2560, DHT11, DS1307 RTC, LCD Display, l293d motor driver, and others.
• 3.3V: Connected to GND of the same module.
• 5V: Connected to GND of the same module.

Arduino Mega 2560

• A0: Connected to wiper of Rotary Potentiometer.
• A1: Connected to SIG of Water Level Sensor.
• D2 PWM: Connected to DB6 of LCD Display.
• D3 PWM: Connected to Pin 2 (in) of a Pushbutton and pin2 of a Resistor.
• D4 PWM: Connected to DB5 of LCD Display.
• D7 PWM: Connected to DATA of DHT11.
• D8 PWM: Connected to DB7 of LCD Display.
• D11 PWM: Connected to E of LCD Display.
• D12 PWM: Connected to RS of LCD Display.
• D18/TX1: Connected to Pin 2 (in) of a Pushbutton and pin2 of a Resistor.
• D19/RX1: Connected to Pin 2 (in) of a Pushbutton and pin2 of a Resistor.
• D20/SDA: Connected to SDA of DS1307 RTC.
• D21/SCL: Connected to SCL of DS1307 RTC.
• D26: Connected to cathode of LED (yellow).
• D27: Connected to cathode of LED (green).
• D28: Connected to cathode of LED (blue).
• D29: Connected to cathode of LED (red).
• D30: Connected to input 1 of l293d motor driver.
• D31: Connected to input 2 of l293d motor driver.
• D32: Connected to IN1 of ULN 2003.
• D33: Connected to IN3 of ULN 2003.
• D34: Connected to IN2 of ULN 2003.
• D35: Connected to IN4 of ULN 2003.
• D36: Connected to VCC of Water Level Sensor.
• 5V: Connected to leg1 of Rotary Potentiometer, GND of multiple components, and VCC of Water Level Sensor.
• GND: Connected to GND of multiple components.

LCD Display (16 pin)

• VSS: Connected to VCC of Potentiometer.
• VDD: Connected to leg2 of Rotary Potentiometer.
• VO: Connected to Output of Potentiometer.
• RS: Connected to D12 PWM of Arduino Mega 2560.
• R_W: Connected to GND.
• E: Connected to D11 PWM of Arduino Mega 2560.
• DB5: Connected to D4 PWM of Arduino Mega 2560.
• DB6: Connected to D2 PWM of Arduino Mega 2560.
• DB7: Connected to D8 PWM of Arduino Mega 2560.
• A: Connected to pin1 of a Resistor.
• K: Connected to GND.

Potentiometer

• GND: Connected to GND.
• Output: Connected to VO of LCD Display.
• VCC: Connected to VSS of LCD Display.

Resistor (220 Ohms)

• pin1: Connected to A of LCD Display.
• pin2: Connected to GND.

Pushbutton

• Pin 3 (out): Connected to leg2 of Rotary Potentiometer.
• Pin 2 (in): Connected to D3 PWM, D18/TX1, and D19/RX1 of Arduino Mega 2560.
• Pin 1 (in): Not connected.
• Pin 4 (out): Not connected.

Resistor (330 Ohms)

• pin1: Connected to anode of LEDs (green, red, yellow, blue).
• pin2: Connected to GND and Pin 2 (in) of Pushbuttons.

LED: Two Pin (green)

• cathode: Connected to D27 of Arduino Mega 2560.
• anode: Connected to pin1 of a Resistor.

LED: Two Pin (red)

• cathode: Connected to D29 of Arduino Mega 2560.
• anode: Connected to pin1 of a Resistor.

LED: Two Pin (yellow)

• cathode: Connected to D26 of Arduino Mega 2560.
• anode: Connected to pin1 of a Resistor.

LED: Two Pin (blue)

• cathode: Connected to D28 of Arduino Mega 2560.
• anode: Connected to pin1 of a Resistor.

Rotary Potentiometer