result management system report for college project
Automaticdcfanenglish 170102145329
1. AUTOMATIC DC
FAN USING LM35
Base on Arduino
for Green House
English version
made by :
M. Daddy Refa M (151611015)
Nurlatifa Haulaini (151611019)
Ronito Halason (151611027)
2.
3. Description
– We used LM35 as a temperature censor, the result of the measurements are
displayed on the LCD
– We used 2 DC Fan 12 volt, one for exhaust fan and another fan as a supply fan
– When the value of temperature under 20°C, LED white will shine and no fan is
working
– When the value of temperature around 26°C until 29°C, LED white and yellow
will shine, and supply fan will be working
– When the value of temperature above 30°C, LED red and white will shine,
supply fan and exhaust fan will be working
5. The Equipment
Arduino UNO
LED : white, red and
yellow
LCD
Diode
Resistor
Wire
Trafo
DC Fan 12 volt
PCB
Relay Module
Solder
LM35
6. Arduino UNO R3
Consists of :
14 pin digital input/output
6 input analog
Mikrokontroler ATmega328
Koneksi USB
Power jack
ICSP header
Reset button
Arduino UNO is a microcontroller
board based on ATmega328
7. Diode
Diode are used for a half wave
rectifier
AC current wave must be rectified
because we need a dc current
The negative part connected to the
fan and positive part to the relay to
occur forward current
LED are diode that can emit light
LED are used as an indicator in
green house
Red light indicates that the
temperature gets too hot
Yellow light indicates that the
temperature in the normal
condition
White light indicates that the
program are working
8. LM35
The function : to change the
temperature scale into electrical
quantities in the form of voltage
The value of voltage : 5V
Has a calibration accuracy of 0.5°C
when the temperature 25°C
Has a maximum range of temperature
around -55°C until 150°C
Has a three plugs, the right side
connected to GND, the left side
connected to 5V, and the middle to
A0
9. LCD
Liquid Crystal Display (LCD)
LCD is a flat panel display or other
electronic visual display that use the
light modulating properties of liquid
crystals.
• Consist 16 character and 2 row
• can be observe with a 4 bit mode or
8 bit mode
• Equipped with back light
• In this project, LCD use to display the
value of temperature
10. Resistor
Resistor is electronic component
that serve to hold electric current.
Because of electrical currents
connected to electric voltage so that
when voltage is passed across the
resistor, there will be a decrease in
that voltage.
12. Fan
• DC fan 12 volt
• The size : 12 cm x 12 cm
• We used 2 fan, one for
exhaust fan and another one
for supply fan
13. Relay Module
• Relay is switch are operated
electrically
• Relay has two electromechanical
components, witch consist of two
main parts they are electromagnetic
(coil) and mechanical (set contact
switches)
• Principle of electromagnetic relay
use to move the switch contacts so
that when the electric current is
small (low power), it can conduct
electricity with a higher voltage
20. To control the Arduino, we must input the program
by using software Arduino IDE. First we should adapt the
COM of the Arduino with our software. Then, we should
choose the same board between the Arduino and the
software . F.or example : Board Arduino Genuino, COM 3)
21. The trouble when making
“Automatic DC Fan”
– We must add the trafo and diodes because the current sources
from Arduino UNO only 5V but we need current sources more
than that
– It takes a lot of wire to connected the LCD with Arduino, so we
decide to change the wire and we use I2C
– we need to change the program on IDE because we use I2C