Circuit Documentation

Summary

This circuit involves an Arduino Nano microcontroller interfacing with two HC-SR04 ultrasonic sensors, a piezo buzzer, a TP4056 battery charger, an LM340T5 7805 voltage regulator, a 18650 Li-Ion battery, and a toggle switch. The Arduino Nano is programmed to control the sensors and the buzzer. The TP4056 manages the charging of the 18650 Li-Ion battery, and the LM340T5 7805 regulates the voltage supplied to the Arduino Nano.

Component List

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

HC-SR04 Ultrasonic Sensor

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

Piezo Buzzer

• Description: A simple buzzer that can be used to produce sound.
• Pins: pin 1, pin 2

18650 Li-Ion Battery

• Description: A rechargeable lithium-ion battery.
• Pins: Positive, Negative

TP4056

• Description: A lithium battery charger module.
• Pins: OUT-, B-, B+, OUT+, IN-, IN+

LM340T5 7805

• Description: A voltage regulator that outputs a steady 5V.
• Pins: Vout, Vin, GND

Toggle Switch SPST

• Description: A single-pole single-throw switch used to control the circuit.
• Pins: L1, COM

Wiring Details

Arduino Nano

• D3 connected to ECHO of the first HC-SR04 Ultrasonic Sensor.
• D5 connected to TRIG of the first HC-SR04 Ultrasonic Sensor.
• D9 connected to pin 2 of the Piezo Buzzer.
• VIN connected to Vout of the LM340T5 7805.
• GND connected to:
  • GND of the first HC-SR04 Ultrasonic Sensor.
  • GND of the second HC-SR04 Ultrasonic Sensor.
  • pin 1 of the Piezo Buzzer.
  • OUT- of the TP4056.
• 5V connected to:
  • VCC of the first HC-SR04 Ultrasonic Sensor.
  • VCC of the second HC-SR04 Ultrasonic Sensor.
• A6 connected to TRIG of the second HC-SR04 Ultrasonic Sensor.
• A5 connected to ECHO of the second HC-SR04 Ultrasonic Sensor.

HC-SR04 Ultrasonic Sensor (First)

• ECHO connected to D3 of the Arduino Nano.
• TRIG connected to D5 of the Arduino Nano.
• GND connected to GND of the Arduino Nano.
• VCC connected to 5V of the Arduino Nano.

HC-SR04 Ultrasonic Sensor (Second)

• ECHO connected to A5 of the Arduino Nano.
• TRIG connected to A6 of the Arduino Nano.
• GND connected to GND of the Arduino Nano.
• VCC connected to 5V of the Arduino Nano.

Piezo Buzzer

• pin 2 connected to D9 of the Arduino Nano.
• pin 1 connected to GND of the Arduino Nano.

18650 Li-Ion Battery

• Positive connected to B+ of the TP4056.
• Negative connected to B- of the TP4056.

TP4056

• OUT- connected to GND of the Arduino Nano.
• OUT+ connected to L1 of the Toggle Switch.
• B+ connected to Positive of the 18650 Li-Ion Battery.
• B- connected to Negative of the 18650 Li-Ion Battery.

LM340T5 7805

• Vout connected to VIN of the Arduino Nano.
• Vin connected to COM of the Toggle Switch.
• GND connected to GND of the Arduino Nano.

Toggle Switch SPST

• L1 connected to OUT+ of the TP4056.
• COM connected to Vin of the LM340T5 7805.

Code Documentation

Arduino Nano Code

File Name: sketch.ino

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

}

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

}

File Name: 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.