23-06-2012, 05:55 PM
Programmable Home Security Alarm System
Programmable Home Security Alarm.pdf (Size: 660.94 KB / Downloads: 75)
In this project we design low cost high performance
programmable home security system using few LDR’s
as an input sensors. When above sensor(s) get
triggered system may dial the user specified phone
number (using build-in DTMF generator) and activate
the high power audio alarm and lights. All the
parameters of DTMF generator, audio alarm and light
interface are programmed through the RS232 serial
interface.
Current firmware of this system presents interactive
control system through the RS232 interface. This
control system consist with the menu driven
configuration options, self tests, system report
generators, etc.
External connectors and controls
DC Power input : Attach DC power supply with 18V -
25V (2A Max.) output.
RS232 Connector : Connect RS232 serial cable to the
port to configure the system. Do not use RS232 Null
Modem cable with this port.
PHONE/LINE connector : Attach standard RJ12/RJ11
telephone cable connector to this port. One port is
need to use with the phone line and remaining port is
for the phone (and it is optional).
3V LASER supply : 3V supply line for LASER diode
assembly.