Post on 30-Nov-2015
AUTOMATIC WIRELESS STREET LIGHT CONTROLLER WITH RTC
This application is used to control the street light wirelessly using RF Technology
and RTC DS1307. Thus the manual switching operation is completely eliminated. This
project provides different on and off timings to operate the lights. The user can once
program these timings according to his requirements and these timings will be stored in
EEPROM and cannot be erased unless the user wishes to change it again.
This system switches on the lights only at preprogrammed timings. As the
DS1307 Real Time Clock chip with battery back-up is used, there will be no disturbances
for the programmed on/off timings even in power failures.
Three switches are provided for entering the required timings. These switches are
connected to microcontroller 89S52. The microcontroller is interfaced with the ULN2003
current driver to which relays are interfaced. We can connect any relay loads. The 16X2
LCD display is provided to display the switching times and current time. The DS1307 is
interfaced to the microcontroller for real timing performance. A 3V battery can be
connected to DS1307 to avoid time disturbances caused by power failures. The user can
even change the preprogrammed timings and set the timings according to his
requirements.
In order to enhance the concept, we use wireless communication to control street
light remotely using RF Transmitter & Receiver working on 434 Mhz. The HT12E
Encoder IC & HT12D Decoder Ics are interfaced with transmitter & receiver circuit
repectively.
SOFTWARE :
1. Keil compiler
2. Embedded C Code
3. ucFlash
4. Orcad.
Hardware Tools:
1. Microcontroller AT89S52.
2. RTC DS1307
3. SWITCHES
4. 16*2 LCD DISPLAY
5. Electrical Loads
BLOCK DIAGRAM
TRANSMITTER:
RECEIVER:
SWITCHES MCU 89S52
16*2 LCD DISPLAY
ULN2003 DRIVER
Street Light Loads
DS1307 RTC
HT12D DecoderRF Receiver
HT12E Encoder
RF Transmitter