Circuit Documentation

Summary

This circuit involves an Arduino Mega 2560 microcontroller interfacing with various components including LEDs, pushbuttons, a rotary potentiometer, an LCD display, a DC motor, a stepper motor, a water level sensor, a DHT11 humidity and temperature sensor, a real-time clock module, and a motor driver. The circuit is designed to demonstrate basic input/output operations, motor control, and sensor data acquisition.

Component List

1. Arduino Mega 2560

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

2. Pushbutton

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

3. Resistor

   • Description: A 330 Ohm resistor.
   • Pins: pin1, pin2
   • Properties: Resistance: 330 Ohms

4. LED: Two Pin (red)

   • Description: A red LED.
   • Pins: cathode, anode

5. LED: Two Pin (yellow)

   • Description: A yellow LED.
   • Pins: cathode, anode

6. LED: Two Pin (blue)

   • Description: A blue LED.
   • Pins: cathode, anode

7. LED: Two Pin (green)

   • Description: A green LED.
   • Pins: cathode, anode

8. L293D

   • Description: A motor driver IC.
   • Pins: Enable 1,2, Input 1, Output 1, GND, Output 2, Input 2, VCC2, VCC1, Input 4, Output 4, Output 3, Input 3, Enable 3,4

9. DC Motor

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

10. Power mb V2

    • Description: A power module.
    • Pins: -, +, DC-ln

11. ULN2003A breakout board

    • Description: A Darlington transistor array.
    • Pins: In 1, In 2, In 3, In 4, In 5, In 6, In 7, 0V, +5V, ON/OFF jumper switch, BLUE wire, PINK wire, YELLOW wire, ORANGE wire, RED wire

12. 28BYJ-48 Stepper Motor

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

13. Water Level Sensor

    • Description: A sensor to measure water level.
    • Pins: SIG, VCC, GND

14. DHT11 Humidity and Temperature Sensor

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

15. Real Time Clock Module - DS1307 RTC Breakout Board

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

16. LCD Display (16 pin)

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

17. Rotary Potentiometer

    • Description: A 10k Ohm rotary potentiometer.
    • Pins: leg1, wiper, leg2
    • Properties: Resistance: 10k Ohms

Wiring Details

Arduino Mega 2560

• 5V: Connected to the 5V pin of the Real Time Clock Module.
• GND: Connected to the GND pin of the Real Time Clock Module.
• D2 PWM: Connected to Pin 4 (out) of the first pushbutton.
• D3 PWM: Connected to Pin 4 (out) of the second pushbutton.
• D6 PWM: Connected to In 1 of the ULN2003A breakout board.
• D7 PWM: Connected to In 2 of the ULN2003A breakout board.
• D8 PWM: Connected to In 3 of the ULN2003A breakout board.
• D9 PWM: Connected to In 4 of the ULN2003A breakout board.
• D10 PWM: Connected to Enable 1,2 of the L293D.
• D11 PWM: Connected to Input 1 of the L293D.
• D12 PWM: Connected to Input 2 of the L293D.
• D13 PWM: Connected to DATA pin of the DHT11 Humidity and Temperature Sensor.
• D20/SDA: Connected to SDA pin of the Real Time Clock Module.
• D21/SCL: Connected to SCL pin of the Real Time Clock Module.
• D23: Connected to the anode of the green LED.
• D24: Connected to the anode of the yellow LED.
• D25: Connected to the anode of the blue LED.
• D27: Connected to the anode of the red LED.
• D46: Connected to DB0 pin of the LCD Display.
• D47: Connected to E pin of the LCD Display.
• D48: Connected to R_W pin of the LCD Display.
• D49: Connected to RS pin of the LCD Display.
• D50: Connected to DB6 pin of the LCD Display.
• D51: Connected to DB5 pin of the LCD Display.
• D52: Connected to DB7 pin of the LCD Display.
• D53: Connected to DB4 pin of the LCD Display.
• A7: Connected to SIG pin of the Water Level Sensor.

Pushbutton

• Pin 1 (in): Connected to Pin 1 (in) of the other pushbutton, +5V pin of the ULN2003A breakout board, and VDD pin of the DHT11 Humidity and Temperature Sensor.
• Pin 4 (out): Connected to D2 PWM pin of the Arduino Mega 2560.
• Pin 4 (out): Connected to D3 PWM pin of the Arduino Mega 2560.

Resistor

• pin1: Connected to Pin 3 (out) of the first pushbutton.
• pin1: Connected to Pin 3 (out) of the second pushbutton.
• pin1: Connected to the cathode of the red LED.
• pin1: Connected to the cathode of the blue LED.
• pin1: Connected to the cathode of the yellow LED.
• pin1: Connected to the cathode of the green LED.
• pin2: Connected to VDD pin of the LCD Display.
• pin2: Connected to VCC pin of the Water Level Sensor.
• pin2: Connected to leg2 of the Rotary Potentiometer.

LED: Two Pin (red)

• anode: Connected to D27 pin of the Arduino Mega 2560.
• cathode: Connected to pin1 of a resistor.

LED: Two Pin (yellow)

• anode: Connected to D24 pin of the Arduino Mega 2560.
• cathode: Connected to pin1 of a resistor.

LED: Two Pin (blue)

• anode: Connected to D25 pin of the Arduino Mega 2560.
• cathode: Connected to pin1 of a resistor.

LED: Two Pin (green)

• anode: Connected to D23 pin of the Arduino Mega 2560.
• cathode: Connected to pin1 of a resistor.

L293D

• Enable 1,2: Connected to D10 PWM pin of the Arduino Mega 2560.
• Input 1: Connected to D11 PWM pin of the Arduino Mega 2560.
• Input 2: Connected to D12 PWM pin of the Arduino Mega 2560.
• Output 1: Connected to pin 1 of the DC Motor.
• Output 2: Connected to pin 2 of the DC Motor.
• GND: Connected to GND pin of the Power mb V2.
• VCC2: Connected to + pin of the Power mb V2.

DC Motor

• pin 1: Connected to Output 1 of the L293D.
• pin 2: Connected to Output 2 of the L293D.

Power mb V2

• -: Connected to GND pin of the L293D.
• +: Connected to VCC2 pin of the L293D.

ULN2003A breakout board

• In 1: Connected to D6 PWM pin of the Arduino Mega 2560