Circuit Documentation

Summary

This circuit integrates various components controlled by an Arduino Nano microcontroller to perform a set of functions. The circuit includes a motor driver (L298N) to control two DC Mini Metal Gear Motors, a MUX (Multiplexer) for signal routing, a boost converter (MT3608) to step up the voltage, and a power source consisting of two 18650 batteries. User inputs are captured through two pushbuttons, and a toggle switch is used to control the power flow from the batteries to the boost converter.

Component List

Microcontroller

• Arduino Nano: A compact microcontroller board based on the ATmega328P, featuring digital and analog I/O pins.

Motor Driver

• L298N DC Motor Driver: A module capable of driving two DC motors with control inputs for speed and direction.

Motors

• DC Mini Metal Gear Motor: Two small DC motors with gear reduction for increased torque.

Power Management

• Boost Converter MT3608: A step-up voltage regulator that boosts the input voltage to a higher level.
• 2x 18650 Batteries: Lithium-ion rechargeable batteries providing the power source for the circuit.
• Toggle Switch: A switch to control the connection between the batteries and the boost converter.

User Input

• Pushbutton: Two simple pushbuttons used for user input.

Signal Routing

• MUX (Multiplexer): A device that selects one of many input signals and forwards the selected input into a single line.

Wiring Details

Arduino Nano

• Digital Pins:
  • D2 connected to Pushbutton 1
  • D3 connected to Pushbutton 2
  • D6 connected to L298N Motor Driver (ENB)
  • D7 connected to L298N Motor Driver (IN4)
  • D8 connected to L298N Motor Driver (IN3)
  • D9 connected to L298N Motor Driver (IN2)
  • D10 connected to L298N Motor Driver (IN1)
  • D11/MOSI connected to L298N Motor Driver (ENA)
• Analog Pins:
  • A0 connected to MUX (SIG)
  • A1 connected to MUX (D)
  • A2 connected to MUX (C)
  • A3 connected to MUX (B)
  • A4 connected to MUX (A)
• Power Pins:
  • 5V connected to MUX (V) and L298N Motor Driver (5V)
  • GND connected to Pushbuttons, MUX (G), and L298N Motor Driver (GND)

L298N DC Motor Driver

• Motor Outputs:
  • OUT1 and OUT2 connected to Motor 1
  • OUT3 and OUT4 connected to Motor 2
• Power Input:
  • 12V connected to Boost Converter (OUTPUT +)
  • GND connected to common ground

DC Mini Metal Gear Motor 1 & 2

• Motor 1:
  • IN1 and IN2 connected to L298N Motor Driver (OUT1 and OUT2)
• Motor 2:
  • IN1 and IN2 connected to L298N Motor Driver (OUT3 and OUT4)

Boost Converter MT3608

• Input:
  • INPUT + connected to Toggle Switch (COM)
  • INPUT - connected to 18650 Batteries (gnd)
• Output:
  • OUTPUT + connected to L298N Motor Driver (12V)
  • OUTPUT - connected to common ground

2x 18650 Batteries

• Power Output:
  • vcc connected to Toggle Switch (L1)
  • gnd connected to common ground

Toggle Switch

• Connections:
  • L1 connected to 18650 Batteries (vcc)
  • COM connected to Boost Converter (INPUT +)

Pushbutton 1

• Connections:
  • Pin 2 connected to Arduino Nano (D2)
  • Pin 3 connected to common ground

Pushbutton 2

• Connections:
  • Pin 2 connected to Arduino Nano (D3)
  • Pin 3 connected to common ground

MUX (Multiplexer)

• Control Inputs:
  • A connected to Arduino Nano (A4)
  • B connected to Arduino Nano (A3)
  • C connected to Arduino Nano (A2)
  • D connected to Arduino Nano (A1)
• Signal Output:
  • SIG connected to Arduino Nano (A0)
• Power:
  • V connected to Arduino Nano (5V)
  • G connected to common ground

Documented Code

Arduino Nano Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Notes (documentation.txt)

No additional code documentation provided.