Download TEMPERATURE DEPENDENT ELECTRIC FAN_0

TEMPERATURE DEPENDENT ELECTRIC FAN
Temperature Sensor
Speed Controller
Increment
Decrement
Enter
MCU Switch
AC/DC Selector
LCD Screen
LIST OF MATERIALS
QUANTITY
DESCRIPTION
3
Push Button
1
Arduino Leonardo Board
3
330Ω Dropping Resistor
1
3k Ω Resistor
1
Relay Driver
1
LCD 16x2
1
LM35 Temperature Sensor
1
LM7805 Voltage Regulator
4
IN4001 Diode
1
1000µF Capacitor
1
Electric Fan with AC/DC Selector
PROCEDURE:
1. Make a power supply for the Arduino Board using LM7805 Voltage Regulator
together with a bridge type diode and filter capacitor.
2. Designate pins for the Input/Output of the Arduino Board.
3. Connect a dropping resistor for the Input Push Buttons.
4. Connect a relay driver to the designated output pin of the Arduino Board.
5. Connect the supply and the signal of the temperature sensor.
6. Use the analog pin of the Arduino Board for the signal of the temperature sensor.
7. Connect the pins of the LCD Screen to the Arduino Board:
LCD
Arduino Board
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 11
Pin 12
Pin 13
Pin 14
Pin 15
Pin 16
Ground
+5V
2.2KΩ from the ground
Pin 8
Ground
Pin 9
Pin 10
Pin 11
Pin 12
Pin 13
+5V
Ground
8. Cut either one of the wire coming from the selector switch of the fan and connect
it to the relay driver (NC).
9. Create a program for the Temperature Dependent Electric Fan.
Note: The fan will automatically turn on and off depending on the temperature
reading of the sensor. The fan will turn on when the actual temperature is higher
than the temperature limit and will turn off when the actual temperature is less
than or equal to the temperature limit after a delay of 30 seconds.