Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with various components including a piezo buzzer, temperature sensor, NPN transistor, resistor, ultrasonic sensor, OLED display, fan, 12V battery, and a step-down voltage regulator. The circuit is designed to monitor temperature and distance, display information on an OLED screen, and control a fan and buzzer based on sensor inputs.

Component List

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

Piezo Buzzer

• Description: A small audio signaling device.
• Pins: pin 1, pin 2

TEMP (Temperature Sensor)

• Description: A sensor to measure temperature.
• Pins: 5V, D3, GND

NPN Transistor (CBE)

• Description: A transistor used for switching applications.
• Pins: collector, base, emitter

Resistor

• Description: A 1000 Ohms resistor.
• Pins: pin1, pin2
• Properties: Resistance: 1000 Ohms

Ultrasonic Sensor

• Description: A sensor to measure distance using ultrasonic waves.
• Pins: +VCC, Trigger, Echo, GND

OLED 1.3"

• Description: A 1.3-inch OLED display.
• Pins: GND, VCC, SCL, SDA

Fan

• Description: A small fan for cooling purposes.
• Pins: GND, 5V

12v5ah Battery

• Description: A 12V 5Ah battery for power supply.
• Pins: 12v +, 12v -

Stepdown 18v to 5V

• Description: A step-down voltage regulator to convert 18V to 5V.
• Pins: VIN, GND IN, GND OUT, VOUT

Comment

• Description: A placeholder for comments.
• Pins: None

Wiring Details

Arduino UNO

• 5V connected to:

  • TEMP (5V)
  • Fan (5V)
  • OLED 1.3" (VCC)
  • Ultrasonic Sensor (+VCC)

• GND connected to:

  • Ultrasonic Sensor (GND)
  • NPN Transistor (emitter)
  • TEMP (GND)
  • Piezo Buzzer (pin 1)
  • OLED 1.3" (GND)
  • Stepdown 18v to 5V (GND OUT)

• Vin connected to:

  • Stepdown 18v to 5V (VOUT)

• A4 connected to:

  • OLED 1.3" (SDA)

• A5 connected to:

  • OLED 1.3" (SCL)

• D2 connected to:

  • TEMP (D3)

• D3 connected to:

  • Resistor (pin2)

• D5 connected to:

  • Ultrasonic Sensor (Echo)

• D6 connected to:

  • Ultrasonic Sensor (Trigger)

• D9 connected to:

  • Piezo Buzzer (pin 2)

Piezo Buzzer

• pin 1 connected to:

  • Arduino UNO (GND)

• pin 2 connected to:

  • Arduino UNO (D9)

TEMP (Temperature Sensor)

• 5V connected to:

  • Arduino UNO (5V)

• D3 connected to:

  • Arduino UNO (D2)

• GND connected to:

  • Arduino UNO (GND)

NPN Transistor (CBE)

• collector connected to:

  • Fan (GND)

• base connected to:

  • Resistor (pin1)

• emitter connected to:

  • Arduino UNO (GND)

Resistor

• pin1 connected to:

  • NPN Transistor (base)

• pin2 connected to:

  • Arduino UNO (D3)

Ultrasonic Sensor

• +VCC connected to:

  • Arduino UNO (5V)

• Trigger connected to:

  • Arduino UNO (D6)

• Echo connected to:

  • Arduino UNO (D5)

• GND connected to:

  • Arduino UNO (GND)

OLED 1.3"

• GND connected to:

  • Arduino UNO (GND)

• VCC connected to:

  • Arduino UNO (5V)

• SCL connected to:

  • Arduino UNO (A5)

• SDA connected to:

  • Arduino UNO (A4)

Fan

• GND connected to:

  • NPN Transistor (collector)

• 5V connected to:

  • Arduino UNO (5V)

12v5ah Battery

• 12v + connected to:

  • Stepdown 18v to 5V (VIN)

• 12v - connected to:

  • Stepdown 18v to 5V (GND IN)

Stepdown 18v to 5V

• VIN connected to:

  • 12v5ah Battery (12v +)

• GND IN connected to:

  • 12v5ah Battery (12v -)

• GND OUT connected to:

  • Arduino UNO (GND)

• VOUT connected to:

  • Arduino UNO (Vin)

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 detailed list of components, their wiring connections, and the code used in the Arduino UNO microcontroller.