Circuit Documentation

Summary

This circuit is designed to interface an Arduino UNO with various components including an HC-SR04 Ultrasonic Sensor, an L298N DC motor driver, hobby motors, a servo motor, a toggle switch, battery mounts, a pushbutton, and a resistor. The Arduino UNO acts as the central controller, managing sensor inputs, driving motors, and controlling a servo based on programmed logic. The circuit is powered by multiple AA battery mounts, and the toggle switch is used to control the power flow to the motor driver.

Component List

Arduino UNO

• Microcontroller board based on the ATmega328P
• It has 14 digital input/output pins, 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP header, and a reset button.

HC-SR04 Ultrasonic Sensor

• An ultrasonic distance sensor that provides 2cm to 400cm non-contact measurement functionality with a ranging accuracy that can reach up to 3mm.

L298N DC Motor Driver

• A high-power motor driver capable of driving up to 2 DC motors.
• It has 4 input terminals for controlling the direction and speed of the motors and 4 output terminals to connect the motors.

Motor Amarillo Motorreductor Hobby (4x)

• A yellow hobby gear motor used for simple robotics and mechanical projects.

Toggle Switch SPST

• A single-pole single-throw (SPST) toggle switch used to control the power supply to the circuit.

2 x AA Battery Mount (4x)

• A battery mount designed to hold 2 AA batteries, used to provide power to the circuit.

Servo

• A small device that has an output shaft. This shaft can be positioned to specific angular positions by sending the servo a coded signal.

Pushbutton

• A simple switch mechanism for controlling some aspect of a machine or a process.

Resistor

• An electrical component that limits or regulates the flow of electrical current in an electronic circuit.

Wiring Details

Arduino UNO

• 5V connected to HC-SR04 VCC, Servo VCC, and Pushbutton Pin 3
• GND connected to HC-SR04 GND, Servo GND, and one leg of the Resistor
• D13 connected to HC-SR04 ECHO
• D12 connected to HC-SR04 TRIG
• D10 connected to L298N ENB
• D9 connected to L298N ENA
• D8 connected to L298N IN4
• D7 connected to L298N IN3
• D5 connected to L298N IN2
• D4 connected to L298N IN1
• D3 connected to Servo pulse
• D2 connected to Pushbutton Pin 1

HC-SR04 Ultrasonic Sensor

• VCC connected to Arduino UNO 5V
• GND connected to Arduino UNO GND
• ECHO connected to Arduino UNO D13
• TRIG connected to Arduino UNO D12

L298N DC Motor Driver

• OUT1 and OUT2 connected to one pair of Motor Amarillo motorreductor hobby terminals
• OUT3 and OUT4 connected to another pair of Motor Amarillo motorreductor hobby terminals
• 12V connected to 2 x AA Battery Mount +
• GND connected to Toggle Switch COM
• ENA and ENB connected to Arduino UNO D9 and D10 respectively
• IN1, IN2, IN3, and IN4 connected to Arduino UNO D4, D5, D7, and D8 respectively

Motor Amarillo Motorreductor Hobby

• Four motors with vcc and GND terminals connected to L298N DC motor driver outputs.

Toggle Switch SPST

• COM connected to L298N GND
• L1 connected to 2 x AA Battery Mount -

2 x AA Battery Mount

• Four mounts with + and - terminals. The + terminals are interconnected and connected to L298N 12V. The - terminals are interconnected and connected to Toggle Switch L1.

Servo

• gnd connected to Arduino UNO GND
• vcc connected to Arduino UNO 5V
• pulse connected to Arduino UNO D3

Pushbutton

• Pin 1 connected to Arduino UNO D2
• Pin 2 connected to one leg of the Resistor
• Pin 3 connected to Arduino UNO 5V

Resistor

• One leg connected to Pushbutton Pin 2
• The other leg connected to Arduino UNO GND

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:

}

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 components as per the requirements of the circuit's application.