Circuit Documentation

Summary

This circuit is built around an Arduino Mega 2560 microcontroller and includes various components such as pushbuttons, resistors, LEDs, a buzzer, a servo motor, a DC motor, an LCD screen, and a motor driver IC (SN754410). The circuit is designed to interface with these components to perform various tasks, which can be controlled and monitored via the Arduino.

Component List

1. Arduino Mega 2560

   • Description: 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 (220 Ohms)

   • Description: Resistor with a resistance of 220 Ohms.
   • Pins: pin1, pin2.

4. Resistor (10k Ohms)

   • Description: Resistor with a resistance of 10k Ohms.
   • Pins: pin1, pin2.

5. Buzzer

   • Description: A simple piezoelectric buzzer.
   • Pins: PIN, GND.

6. LED: Two Pin (green)

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

7. LED: Two Pin (yellow)

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

8. LED: Two Pin (blue)

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

9. LCD screen 16x2 I2C

   • Description: 16x2 character LCD screen with I2C interface.
   • Pins: SCL, SDA, VCC, GND.

10. Servo

    • Description: Servo motor.
    • Pins: GND, VCC, PWM.

11. DC Motor

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

12. SN754410

    • Description: Quadruple half-H driver.
    • Pins: 1,2 Enable, 1 In, 1 Out, GND, 2 Out, 2 In, VCC Motor, VCC Logic, 4 In, 4 Out, 3 Out, 3 In, 3,4 Enable.

13. Power Supply

    • Description: Power supply unit.
    • Pins: +, -.

14. Reed Switch

    • Description: Magnetic reed switch.
    • Pins: pin 1, pin 2.

Wiring Details

Arduino Mega 2560

• 5V is connected to:

  • VCC Logic of SN754410
  • VCC of Servo
  • VCC of LCD screen 16x2 I2C
  • 1,2 Enable of SN754410

• GND is connected to:

  • pin1 of multiple 220 Ohms resistors
  • pin2 of multiple 10k Ohms resistors
  • GND of Buzzer
  • GND of SN754410
  • GND of Servo
  • GND of LCD screen 16x2 I2C
  • • of Power Supply
  • pin 2 of multiple Reed Switches

• D21/SCL is connected to:

  • SCL of LCD screen 16x2 I2C

• D20/SDA is connected to:

  • SDA of LCD screen 16x2 I2C

• D2 PWM is connected to:

  • Pin 4 (out) of Pushbutton

• D3 PWM is connected to:

  • Pin 4 (out) of another Pushbutton

• D4 PWM is connected to:

  • Pin 4 (out) of another Pushbutton

• D6 PWM is connected to:

  • PIN of Buzzer

• D7 PWM is connected to:

  • PWM of Servo

• D8 PWM is connected to:

  • pin1 of a 10k Ohms Resistor
  • pin 1 of a Reed Switch

• D9 PWM is connected to:

  • pin1 of another 10k Ohms Resistor
  • pin 1 of another Reed Switch

• D10 PWM is connected to:

  • pin1 of another 10k Ohms Resistor
  • pin 1 of another Reed Switch

• D12 PWM is connected to:

  • 1 In of SN754410

• D13 PWM is connected to:

  • 2 In of SN754410

• D26 is connected to:

  • anode of Blue LED

• D24 is connected to:

  • anode of Yellow LED

• D22 is connected to:

  • anode of Green LED
  • pin2 of a 220 Ohms Resistor

Pushbutton

• Pin 4 (out) is connected to:

  • D2 PWM of Arduino Mega 2560

• Pin 4 (out) of another Pushbutton is connected to:

  • D3 PWM of Arduino Mega 2560

• Pin 4 (out) of another Pushbutton is connected to:

  • D4 PWM of Arduino Mega 2560

• Pin 1 (in) is connected to:

  • pin2 of a 220 Ohms Resistor

• Pin 1 (in) of another Pushbutton is connected to:

  • pin2 of another 220 Ohms Resistor

• Pin 1 (in) of another Pushbutton is connected to:

  • pin2 of another 220 Ohms Resistor

Resistor (220 Ohms)

• pin1 is connected to:

  • GND of Arduino Mega 2560

• pin2 is connected to:

  • Pin 1 (in) of Pushbutton

• pin2 of another Resistor is connected to:

  • Pin 1 (in) of another Pushbutton

• pin2 of another Resistor is connected to:

  • Pin 1 (in) of another Pushbutton

• pin2 of another Resistor is connected to:

  • cathode of Yellow LED

• pin2 of another Resistor is connected to:

  • cathode of Blue LED

Resistor (10k Ohms)

• pin1 is connected to:

  • D8 PWM of Arduino Mega 2560
  • pin 1 of Reed Switch

• pin1 of another Resistor is connected to:

  • D9 PWM of Arduino Mega 2560
  • pin 1 of another Reed Switch

• pin1 of another Resistor is connected to:

  • D10 PWM of Arduino Mega 2560
  • pin 1 of another Reed Switch

Buzzer

• PIN is connected to:

  • D6 PWM of Arduino Mega 2560

• GND is connected to:

  • GND of Arduino Mega 2560

LED: Two Pin (green)

• anode is connected to:

  • D22 of Arduino Mega 2560

• cathode is connected to:

  • pin2 of a 220 Ohms Resistor

LED: Two Pin (yellow)

• anode is connected to:

  • D24 of Arduino Mega 2560

• cathode is connected to:

  • pin2 of a 220 Ohms Resistor

LED: Two Pin (blue)

• anode is connected to:

  • D26 of Arduino Mega 2560

• cathode is connected to:

  • pin2 of a 220 Ohms Resistor

LCD screen 16x2 I2C

• SCL is connected to:

  • D21/SCL of Arduino Mega 2560

• SDA is connected to:

  • D20/SDA of Arduino Mega 2560

• VCC is connected to:

  • 5V of Arduino Mega 2560

• GND is connected to:

  • GND of Arduino Mega 2560

Servo

• PWM is connected to:

  • D7 PWM of Arduino Mega 2560

• VCC is connected to:

  • 5V of Arduino Mega 2560

• GND is connected to:

  • GND of Arduino Mega 2560

DC Motor

• pin 1 is connected to:

  • 1 Out of SN754410

• pin 2 is connected to:

  • 2 Out of SN754410

SN754410

• 1,2 Enable is connected to:

  • 5V of Arduino Mega 2560

• 1 In is connected to:

  • D12 PWM of Arduino Mega 2560

• 1 Out is connected to:

  • pin