Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with an HC-SR04 Ultrasonic Sensor, a buzzer, and an LED. The circuit is powered by a 7.4V battery through a rocker switch. The Arduino UNO controls the sensor, buzzer, and LED, and the connections are detailed below.

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. HC-SR04 Ultrasonic Sensor

   • Description: A sensor used to measure distance using ultrasonic waves.
   • Pins: VCC, TRIG, ECHO, GND

3. 7.4V Battery

   • Description: A power source for the circuit.
   • Pins: +, -

4. Rocker Switch

   • Description: A switch to control the power supply from the battery.
   • Pins: 1, 2

5. Buzzer

   • Description: An audio signaling device.
   • Pins: PIN, GND

6. LED: Two Pin (red)

   • Description: A red light-emitting diode.
   • Pins: cathode, anode

Wiring Details

Arduino UNO

• 5V connected to VCC of HC-SR04 Ultrasonic Sensor and 2 of Rocker Switch.
• GND connected to GND of HC-SR04 Ultrasonic Sensor, cathode of LED, - of 7.4V Battery, and GND of Buzzer.
• D11 connected to PIN of Buzzer.
• D9 connected to TRIG of HC-SR04 Ultrasonic Sensor.
• D8 connected to ECHO of HC-SR04 Ultrasonic Sensor.
• D7 connected to anode of LED.

HC-SR04 Ultrasonic Sensor

• VCC connected to 5V of Arduino UNO and 2 of Rocker Switch.
• GND connected to GND of Arduino UNO and cathode of LED.
• TRIG connected to D9 of Arduino UNO.
• ECHO connected to D8 of Arduino UNO.

7.4V Battery

• + connected to 1 of Rocker Switch.
• - connected to GND of Arduino UNO.

Rocker Switch

• 1 connected to + of 7.4V Battery.
• 2 connected to 5V of Arduino UNO and VCC of HC-SR04 Ultrasonic Sensor.

Buzzer

• PIN connected to D11 of Arduino UNO.
• GND connected to GND of Arduino UNO.

LED: Two Pin (red)

• cathode connected to GND of Arduino UNO.
• anode connected to D7 of 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:

}

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 UNO microcontroller.