Circuit Documentation

Summary of the Circuit

This circuit is designed around the Arduino UNO microcontroller, which serves as the central processing unit. The circuit includes an HC-SR04 Ultrasonic Sensor for distance measurement, a blue LED for indication purposes, and a resistor to limit the current through the LED. The Arduino UNO controls the LED and reads data from the ultrasonic sensor.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0-A5, SCL, SDA, AREF, D0-D13.
• Purpose: Acts as the central controller for the circuit, interfacing with the sensor and controlling the LED.

LED: Two Pin (blue)

• Description: A basic blue light-emitting diode.
• Pins: cathode, anode.
• Purpose: Provides visual indication controlled by the Arduino.

Resistor

• Description: A passive two-terminal electrical component that implements electrical resistance.
• Pins: pin1, pin2.
• Value: 200 Ohms.
• Purpose: Limits the current flowing through the LED to prevent damage.

HC-SR04 Ultrasonic Sensor

• Description: An ultrasonic distance sensor.
• Pins: VCC, TRIG, ECHO, GND.
• Purpose: Measures distances by emitting ultrasonic waves and detecting their reflections.

Wiring Details

Arduino UNO

• D3: Connected to pin2 of the Resistor.
• GND: Shared connection with the cathode of the LED and GND of the HC-SR04 Ultrasonic Sensor.
• D7: Connected to ECHO of the HC-SR04 Ultrasonic Sensor.
• D6: Connected to TRIG of the HC-SR04 Ultrasonic Sensor.
• 5V: Connected to VCC of the HC-SR04 Ultrasonic Sensor.

LED: Two Pin (blue)

• cathode: Connected to GND of the Arduino UNO and GND of the HC-SR04 Ultrasonic Sensor.
• anode: Connected to pin1 of the Resistor.

Resistor

• pin1: Connected to the anode of the LED.
• pin2: Connected to D3 of the Arduino UNO.

HC-SR04 Ultrasonic Sensor

• VCC: Connected to 5V of the Arduino UNO.
• TRIG: Connected to D6 of the Arduino UNO.
• ECHO: Connected to D7 of the Arduino UNO.
• GND: Shared connection with the cathode of the LED and GND 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:

}

Note: The provided code is a template and does not include specific functionality. It needs to be populated with the setup and loop code to control the LED and interface with the HC-SR04 Ultrasonic Sensor.