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, power transformer, bridge rectifier, and a voltage converter. The circuit is designed to perform multiple functions such as temperature sensing, distance measurement, and displaying information on an OLED screen.

Component List

1. Arduino UNO

   • Description: 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. Piezo Buzzer

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

3. TEMP

   • Description: Temperature sensor.
   • Pins: 5V, D3, GND

4. NPN Transistor (CBE)

   • Description: NPN transistor with collector, base, and emitter pins.
   • Pins: collector, base, emitter

5. Resistor

   • Description: Resistor with a resistance of 1000 Ohms.
   • Pins: pin1, pin2

6. Ultrasonic Sensor

   • Description: Sensor for measuring distance using ultrasonic waves.
   • Pins: +VCC, Trigger, Echo, GND

7. OLED 1.3"

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

8. Fan

   • Description: Small cooling fan.
   • Pins: GND, 5V

9. Power Transformer (220V to 24V)

   • Description: Transformer to step down 220V AC to 24V AC.
   • Pins: 2 - Primary, 1 - Primary, 3 - Secondary, 4 - Secondary

10. 48v to 5v

    • Description: Voltage converter to step down 48V to 5V.
    • Pins: out+, out--, in+, in--

11. Bridge Rectifier

    • Description: Converts AC to DC.
    • Pins: Source_in-, source_out-, source_out+, source_in+

12. Power 220v

    • Description: 220V AC power source.
    • Pins: hot wire, neutral wire

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)
  • 48v to 5v (out--)

• Vin connected to:

  • 48v to 5v (out+)

• 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

• 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)

Power Transformer (220V to 24V)

• 2 - Primary connected to:

  • Power 220v (hot wire)

• 1 - Primary connected to:

  • Power 220v (neutral wire)

• 3 - Secondary connected to:

  • Bridge Rectifier (source_in+)

• 4 - Secondary connected to:

  • Bridge Rectifier (Source_in-)

48v to 5v

• out+ connected to:

  • Arduino UNO (Vin)

• out-- connected to:

  • Arduino UNO (GND)

• in+ connected to:

  • Bridge Rectifier (source_out+)

• in-- connected to:

  • Bridge Rectifier (source_out-)

Bridge Rectifier

• source_in+ connected to:

  • Power Transformer (3 - Secondary)

• Source_in- connected to:

  • Power Transformer (4 - Secondary)

• source_out+ connected to:

  • 48v to 5v (in+)

• source_out- connected to:

  • 48v to 5v (in--)

Power 220v

• hot wire connected to:

  • Power Transformer (2 - Primary)

• neutral wire connected to:

  • Power Transformer (1 - Primary)

Documented Code

Arduino UNO Code

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

}

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

}

This code is a basic template for the Arduino UNO. The setup() function is used to initialize any settings or configurations, and the loop() function contains the main logic that runs repeatedly.