Circuit Documentation

Summary

This circuit integrates an Arduino Nano microcontroller with a variety of components including a DC motor driver, gearmotors for wheels, a servo motor, a wireless communication module (NRF24L01), and a power supply consisting of 2x 18650 batteries with a rocker switch. The Arduino Nano is responsible for controlling the motors through the L298N motor driver, interfacing with the NRF24L01 module for wireless communication, and driving a servo motor. The circuit is designed to be a part of a remotely controlled vehicle with wireless capabilities.

Component List

Arduino Nano

• Microcontroller board based on the ATmega328P
• It has a variety of digital and analog I/O pins.

Gearmotor DC Wheels (Right and Left)

• DC motors with gear reduction used for driving the wheels of the vehicle.

Servo

• A small rotary actuator that has built-in control circuitry.

L298N DC Motor Driver

• An integrated circuit that allows control of two DC motors simultaneously.
• It can drive motors with a voltage between 5V and 35V at up to 2A each.

2x 18650 Batteries

• Rechargeable lithium-ion cells used to power the circuit.

Rocker Switch

• A simple on-off switch that controls the power supply to the circuit.

NRF24L01

• A wireless transceiver module that operates in the 2.4 GHz band.
• It is used for wireless communication between the vehicle and a remote controller.

Wiring Details

Arduino Nano

• GND connected to NRF24L01 GND, L298N GND, and Servo GND.
• D2 connected to L298N IN3.
• D3 connected to L298N ENB.
• D4 connected to L298N IN4.
• D7 connected to NRF24L01 CE.
• D8 connected to NRF24L01 CSN.
• D10 connected to Servo PWM.
• D11/MOSI connected to NRF24L01 MOSI.
• D12/MISO connected to NRF24L01 MISO.
• A2 connected to L298N ENA.
• A1 connected to L298N IN2.
• A0 connected to L298N IN1.
• 3V3 connected to NRF24L01 VCC (3V).
• D13/SCK connected to NRF24L01 SCK.

Gearmotor DC Wheels (Right and Left)

• Right Motor PIN1 connected to L298N OUT4.
• Right Motor PIN2 connected to L298N OUT3.
• Left Motor PIN1 connected to L298N OUT2.
• Left Motor PIN2 connected to L298N OUT1.

Servo

• PWM connected to Arduino Nano D10.
• VCC connected to Rocker Switch pin 2 and L298N 12V.
• GND connected to 2x 18650 gnd and L298N GND.

L298N DC Motor Driver

• GND connected to Arduino Nano GND, Servo GND, and 2x 18650 gnd.
• 12V connected to Servo VCC and Rocker Switch pin 2.
• 5V (if used) would be connected to a 5V supply.
• ENA, IN1, IN2, IN3, IN4, ENB connected to various pins on the Arduino Nano for control signals.
• OUT1, OUT2, OUT3, OUT4 connected to the gearmotors.

2x 18650 Batteries

• vcc connected to Rocker Switch pin 1.
• gnd connected to Servo GND and L298N GND.

Rocker Switch

• Pin 1 connected to 2x 18650 vcc.
• Pin 2 connected to Servo VCC and L298N 12V.

NRF24L01

• GND connected to Arduino Nano GND.
• CE connected to Arduino Nano D7.
• CSN connected to Arduino Nano D8.
• MOSI connected to Arduino Nano D11/MOSI.
• MISO connected to Arduino Nano D12/MISO.
• VCC (3V) connected to Arduino Nano 3V3.
• SCK connected to Arduino Nano D13/SCK.

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:

}

Note: The provided code is a template and does not contain any functional code. It needs to be populated with the logic to control the motors, read sensors, and handle wireless communication.