Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes an Arduino Mega 2560 microcontroller, stepper motors, DC motors, motor drivers, an LCD display, a keypad, and various other components. The circuit is designed to control multiple motors and display information on an LCD screen, with user input provided via a membrane keypad.

Component List

Arduino Mega 2560

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

Stepper Motor (Bipolar)

• Description: A bipolar stepper motor.
• Pins: D, B, C, A

775 Motor

• Description: A high-torque DC motor.
• Pins: positive, negative

DC Motor

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

A4988 Stepper Motor Driver (Red)

• Description: A driver for controlling stepper motors.
• Pins: ENABLE, MS1, MS2, MS3, RESET, SLEEP, STEP, DIR, VMOT, GND, 2B, 2A, 1A, 1B, VDD

NEMA 23

• Description: A high-torque stepper motor.
• Pins: B2 Red, B1 Blue, A2 Black, A1 Green

POWER SUPPLY 12V 5AMP

• Description: A power supply unit providing 12V at 5A.
• Pins: 220V Positive Pole (AC), 220V Negative Pole (AC), GND, GND (DC), 12V-24V Output (DC)

Electrolytic Capacitor

• Description: A capacitor with a capacitance of 0.000001 Farads.
• Pins: -, +

Lcd 20x4 i2c

• Description: A 20x4 character LCD display with I2C interface.
• Pins: GND, 5v, SCA, SCL

L298N DC motor driver

• Description: A dual H-bridge motor driver.
• Pins: OUT1, OUT2, 12V, GND, 5V, OUT3, OUT4, 5V-ENA-JMP-I, 5V-ENA-JMP-O, +5V-J1, +5V-J2, ENA, IN1, IN2, IN3, IN4, ENB

4X4 Membrane Matrix Keypad

• Description: A 4x4 matrix keypad.
• Pins: R1, R2, R3, R4, C1, C2, C3, C4

Nema 17 42-STH48

• Description: A standard NEMA 17 stepper motor.
• Pins: A2 (black), A1 Green, B2 Red, B1 Blue

Wiring Details

Arduino Mega 2560

• 5V connected to Lcd 20x4 i2c (5v)
• GND connected to Lcd 20x4 i2c (GND)
• GND connected to A4988 Stepper Motor Driver (Red) (GND)
• A4 connected to Lcd 20x4 i2c (SCA)
• A5 connected to Lcd 20x4 i2c (SCL)
• D2 PWM connected to 4X4 Membrane Matrix Keypad (R1)
• D3 PWM connected to 4X4 Membrane Matrix Keypad (R2)
• D4 PWM connected to 4X4 Membrane Matrix Keypad (R3)
• D5 PWM connected to 4X4 Membrane Matrix Keypad (R4)
• D6 PWM connected to 4X4 Membrane Matrix Keypad (C1)
• D7 PWM connected to 4X4 Membrane Matrix Keypad (C2)
• D8 PWM connected to 4X4 Membrane Matrix Keypad (C3)
• D9 PWM connected to 4X4 Membrane Matrix Keypad (C4)
• D48 connected to L298N DC motor driver (IN1)
• D44 connected to L298N DC motor driver (IN3)
• D34 connected to A4988 Stepper Motor Driver (Red) (DIR)
• D30 connected to A4988 Stepper Motor Driver (Red) (STEP)
• D26 connected to A4988 Stepper Motor Driver (Red) (STEP)
• D24 connected to A4988 Stepper Motor Driver (Red) (STEP)
• D22 connected to A4988 Stepper Motor Driver (Red) (STEP)
• 5V connected to A4988 Stepper Motor Driver (Red) (VDD)
• GND connected to A4988 Stepper Motor Driver (Red) (GND)
• D49 connected to L298N DC motor driver (IN2)
• D45 connected to L298N DC motor driver (IN4)
• D35 connected to A4988 Stepper Motor Driver (Red) (STEP)
• D31 connected to A4988 Stepper Motor Driver (Red) (DIR)
• D27 connected to A4988 Stepper Motor Driver (Red) (DIR)
• D25 connected to A4988 Stepper Motor Driver (Red) (DIR)
• D23 connected to A4988 Stepper Motor Driver (Red) (DIR)

Stepper Motor (Bipolar)

• D connected to A4988 Stepper Motor Driver (Red) (1B)
• B connected to A4988 Stepper Motor Driver (Red) (1A)
• C connected to A4988 Stepper Motor Driver (Red) (2A)
• A connected to A4988 Stepper Motor Driver (Red) (2B)

775 Motor

• positive connected to L298N DC motor driver (OUT4)
• negative connected to L298N DC motor driver (OUT3)

DC Motor

• pin 1 connected to L298N DC motor driver (OUT2)
• pin 2 connected to L298N DC motor driver (OUT1)

A4988 Stepper Motor Driver (Red)

• RESET connected to SLEEP
• VMOT connected to Electrolytic Capacitor (+)
• GND connected to Electrolytic Capacitor (-)

NEMA 23

• B2 Red connected to A4988 Stepper Motor Driver (Red) (2B)
• B1 Blue connected to A4988 Stepper Motor Driver (Red) (1B)
• A2 Black connected to A4988 Stepper Motor Driver (Red) (2A)
• A1 Green connected to A4988 Stepper Motor Driver (Red) (1A)

POWER SUPPLY 12V 5AMP

• 12V-24V Output (DC) connected to Electrolytic Capacitor (+)
• GND (DC) connected to Electrolytic Capacitor (-)

Electrolytic Capacitor

• + connected to A4988 Stepper Motor Driver (Red) (VMOT)
• - connected to A4988 Stepper Motor Driver (Red) (GND)

Lcd 20x4 i2c

• 5v connected to Arduino Mega 2560 (5V)
• GND connected to Arduino Mega 2560 (GND)
• SCA connected to Arduino Mega 2560 (A4)
• SCL connected to Arduino Mega 2560 (A5)

L298N DC motor driver

• IN1 connected to Arduino Mega 2560 (D48)
• IN2 connected to Arduino Mega 2560 (D49)
• IN3 connected to Arduino Mega 2560 (D44)
• IN4 connected to Arduino Mega 2560 (D45)
• OUT1 connected to DC Motor (pin 2)
• OUT2 connected to DC Motor (pin 1)
• OUT3 connected to 775 motor (negative)
• OUT4 connected to 775 motor (positive)

4X4 Membrane Matrix Keypad

• R1 connected to Arduino Mega 2560 (D2 PWM)
• R2 connected to Arduino Mega 2560 (D3