Circuit Documentation

Summary

This circuit is designed to interface an Arduino Nano with an HC-SR04 Ultrasonic Sensor and a buzzer. The circuit is powered by a 3xAAA battery pack with a rocker switch for power control. The Arduino Nano reads distance measurements from the ultrasonic sensor and can trigger the buzzer based on the readings.

Component List

1. Arduino Nano

   • Description: A small, complete, and breadboard-friendly board based on the ATmega328P.
   • Pins: D1/TX, D0/RX, RESET, GND, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11/MOSI, D12/MISO, VIN, 5V, A7, A6, A5, A4, A3, A2, A1, A0, AREF, 3V3, D13/SCK

2. Rocker Switch

   • Description: A simple on/off switch to control the power supply.
   • Pins: 1, 2

3. 3xAAA Battery Pack with Switch and JST

   • Description: A battery pack that holds three AAA batteries and includes a switch and JST connector.
   • Pins: POS, NEG

4. Buzzer

   • Description: An electronic device that produces a sound when a voltage is applied.
   • Pins: PIN, GND

5. HC-SR04 Ultrasonic Sensor

   • Description: A sensor that measures distance by using ultrasonic waves.
   • Pins: VCC, TRIG, ECHO, GND

Wiring Details

Arduino Nano

• GND is connected to:

  • GND of the Buzzer
  • GND of the HC-SR04 Ultrasonic Sensor
  • Pin 1 of the Rocker Switch

• D6 is connected to:

  • TRIG of the HC-SR04 Ultrasonic Sensor

• D7 is connected to:

  • ECHO of the HC-SR04 Ultrasonic Sensor

• D11/MOSI is connected to:

  • PIN of the Buzzer

• VIN is connected to:

  • POS of the 3xAAA Battery Pack with Switch and JST

• 5V is connected to:

  • VCC of the HC-SR04 Ultrasonic Sensor

Rocker Switch

• Pin 1 is connected to:

  • GND of the Arduino Nano

• Pin 2 is connected to:

  • NEG of the 3xAAA Battery Pack with Switch and JST

3xAAA Battery Pack with Switch and JST

• POS is connected to:

  • VIN of the Arduino Nano

• NEG is connected to:

  • Pin 2 of the Rocker Switch

Buzzer

• PIN is connected to:

  • D11/MOSI of the Arduino Nano

• GND is connected to:

  • GND of the Arduino Nano

HC-SR04 Ultrasonic Sensor

• VCC is connected to:

  • 5V of the Arduino Nano

• TRIG is connected to:

  • D6 of the Arduino Nano

• ECHO is connected to:

  • D7 of the Arduino Nano

• GND is connected to:

  • GND of the Arduino Nano

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 Documentation (documentation.txt)

This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and the code used in the Arduino Nano.