Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller, a 12V fan, a DHT11 humidity and temperature sensor, two LEDs (red and blue), resistors, a rectifier diode, and an IRF520 PWM module. The circuit is designed to control the fan and LEDs based on the sensor readings and other inputs.

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. 120 fan 12V

   • Description: A 12V cooling fan.
   • Pins: 12V+, GND

3. Resistor (100 Ohms)

   • Description: A resistor with a resistance of 100 Ohms.
   • Pins: pin1, pin2

4. LED: Two Pin (red)

   • Description: A red LED.
   • Pins: cathode, anode

5. LED: Two Pin (blue)

   • Description: A blue LED.
   • Pins: cathode, anode

6. 1N4007 Rectifier Diode

   • Description: A rectifier diode.
   • Pins: Cathode, Anode

7. IRF520 PWM

   • Description: A PWM module.
   • Pins: V+, V-, Vin, GND, SIG, Vcc

8. DHT11 Humidity and Temperature Sensor

   • Description: A sensor for measuring humidity and temperature.
   • Pins: VDD, DATA, NULL, GND

9. Battery 12V

   • Description: A 12V battery.
   • Pins: +, -

Wiring Details

Arduino UNO

• 5V connected to:

  • IRF520 PWM (Vcc)
  • DHT11 Humidity and Temperature Sensor (VDD)

• GND connected to:

  • IRF520 PWM (GND)
  • LED: Two Pin (blue) (cathode)
  • DHT11 Humidity and Temperature Sensor (GND)
  • LED: Two Pin (red) (cathode)

• D6 connected to:

  • Resistor (pin1)
  • Resistor (pin2)
  • LED: Two Pin (red) (anode)

• D5 connected to:

  • LED: Two Pin (blue) (anode)
  • Resistor (pin1)
  • Resistor (pin2)

• D4 connected to:

  • IRF520 PWM (SIG)

• D3 connected to:

  • DHT11 Humidity and Temperature Sensor (DATA)

120 fan 12V

• 12V+ connected to:

  • IRF520 PWM (V+)

• GND connected to:

  • IRF520 PWM (V-)

Resistor (100 Ohms)

• pin1 connected to:

  • Resistor (pin2)
  • LED: Two Pin (red) (anode)
  • Arduino UNO (D6)

• pin2 connected to:

  • Resistor (pin1)
  • LED: Two Pin (blue) (anode)
  • Arduino UNO (D5)

LED: Two Pin (red)

• cathode connected to:

  • Arduino UNO (GND)

• anode connected to:

  • Resistor (pin1)
  • Resistor (pin2)
  • Arduino UNO (D6)

LED: Two Pin (blue)

• cathode connected to:

  • Arduino UNO (GND)

• anode connected to:

  • Resistor (pin1)
  • Resistor (pin2)
  • Arduino UNO (D5)

1N4007 Rectifier Diode

• Anode connected to:

  • IRF520 PWM (Vin)
  • Battery 12V (+)

• Cathode connected to:

  • IRF520 PWM (GND)
  • Battery 12V (-)

IRF520 PWM

• Vcc connected to:

  • Arduino UNO (5V)

• GND connected to:

  • Arduino UNO (GND)
  • 1N4007 Rectifier Diode (Cathode)
  • Battery 12V (-)

• SIG connected to:

  • Arduino UNO (D4)

• V+ connected to:

  • 120 fan 12V (12V+)

• V- connected to:

  • 120 fan 12V (GND)

• Vin connected to:

  • 1N4007 Rectifier Diode (Anode)
  • Battery 12V (+)

DHT11 Humidity and Temperature Sensor

• VDD connected to:

  • Arduino UNO (5V)

• DATA connected to:

  • Arduino UNO (D3)

• GND connected to:

  • Arduino UNO (GND)

Battery 12V

• + connected to:

  • 1N4007 Rectifier Diode (Anode)
  • IRF520 PWM (Vin)

• - connected to:

  • 1N4007 Rectifier Diode (Cathode)
  • IRF520 PWM (GND)

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)