Circuit Documentation

Summary

This circuit is designed to control two DC motors using an Arduino UNO and an L298N DC motor driver. The speed of the motors is controlled via a potentiometer. The circuit is powered by a 2x 18650 battery pack.

Component List

1. Arduino UNO

   • Description: A microcontroller board based on the ATmega328P.
   • Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0

2. Motor (x2)

   • Description: A DC motor.
   • Pins: negative, positive

3. 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

4. 2x 18650 Battery Pack

   • Description: A battery pack containing two 18650 batteries.
   • Pins: vcc, gnd

5. Potentiometer

   • Description: A variable resistor used to control voltage.
   • Pins: GND, Output, VCC

Wiring Details

Arduino UNO

• 5V connected to VCC of the Potentiometer.
• GND connected to GND of the Potentiometer.
• GND connected to GND of the L298N DC Motor Driver.
• Vin connected to vcc of the 2x 18650 Battery Pack.
• A0 connected to Output of the Potentiometer.
• GND connected to gnd of the 2x 18650 Battery Pack.
• D10 connected to ENA of the L298N DC Motor Driver.
• D9 connected to IN2 of the L298N DC Motor Driver.
• D8 connected to IN1 of the L298N DC Motor Driver.
• D6 connected to ENB of the L298N DC Motor Driver.
• D5 connected to IN4 of the L298N DC Motor Driver.
• D4 connected to IN3 of the L298N DC Motor Driver.

Motor 1

• negative connected to OUT2 of the L298N DC Motor Driver.
• positive connected to OUT1 of the L298N DC Motor Driver.

Motor 2

• negative connected to OUT4 of the L298N DC Motor Driver.
• positive connected to OUT3 of the L298N DC Motor Driver.

L298N DC Motor Driver

• GND connected to GND of the Arduino UNO.
• 12V connected to vcc of the 2x 18650 Battery Pack.
• ENA connected to D10 of the Arduino UNO.
• IN2 connected to D9 of the Arduino UNO.
• IN1 connected to D8 of the Arduino UNO.
• ENB connected to D6 of the Arduino UNO.
• IN4 connected to D5 of the Arduino UNO.
• IN3 connected to D4 of the Arduino UNO.
• OUT2 connected to negative of Motor 1.
• OUT1 connected to positive of Motor 1.
• OUT4 connected to negative of Motor 2.
• OUT3 connected to positive of Motor 2.

2x 18650 Battery Pack

• vcc connected to Vin of the Arduino UNO.
• vcc connected to 12V of the L298N DC Motor Driver.
• gnd connected to GND of the Arduino UNO.

Potentiometer

• VCC connected to 5V of the Arduino UNO.
• GND connected to GND of the Arduino UNO.
• Output connected to A0 of the Arduino UNO.

Documented Code

Arduino UNO Code (sketch.ino)

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

}

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

}

Additional Documentation (documentation.txt)