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Programmable Home Security System using LDR (TDA2002)

2017-07-13 04:08  
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This article describes the Programmable Home Security System using LDR (TDA2002). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:TDA2002.
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In this project we design low cost high performance programmable home securitysystemusing few LDR’s as an input sensors. When above sensor(s) get triggeredsystemmay dial the user specifiedphonenumber (using build-in DTMF generator) and activate the high power audioalarmand lights. All the parameters of DTMF generator, audioalarmand light interface are programmed through the RS232 serial interface.

autoalarm connections Programmable Home Security System using LDR

Current firmware of thissystempresents interactive controlsystemthrough the RS232 interface. This controlsystemconsist with the menu driven configuration options, self tests,systemreport generators, etc.

Thissystemalso contain 5W (with 4Ω speaker) audioalarmwith three selectable tone configurations, which include Police siren, Fire engine siren and Ambulance siren.

System Features

Touch tonephonedialing interface
5W High powerful audioalarm
2 sensor interface with separate sensitivity adjustments
Programmed through the RS232 interface
Build-In intelligent light ON/OFF switch

Integrated Circuits

Thissystemuses a Microchip’s PIC16F877A as a main
controller, LM339 as sensor interface, UM3561 as a tone generator and
μPC2002 (TDA2002) as a speaker driver (audio amplifier). LM7805, LM7812
and LM317 voltage regulators are used to obtain 5V, 12V and 3V
respectively.

Assembly
The PCB design given with this article makes the assembly much simpler.
As PCB contain 230V AC main lines care must be taken while assembling
the circuit. As shown in the fig.1 all the photoelectric sensors, some
of the switches andalarmspeaker are connected with the circuit through the connector bars.

External connectors and controls

PCB SCHEMATICS

?autoalarm schematic th Programmable Home Security System using LDR

autoalarm pcb th Programmable Home Security System using LDR

autoalarm parts layout th Programmable Home Security System using LDR

component layout th Programmable Home Security System using LDR

Parts List

IC1PIC16F877A
IC2LM339N
IC3MAX232
IC4UM3561
IC5μPC2002
IC6LM7805
IC7LM7812
IC8LM317
D11N4004
D21N4148
T1, T32SC945
T22SD400
Q120.00MHz Crystal
Q2BS170
Q3IRF9640
R4, R830K (LIN) Potentiometr
R620K (LIN) Potentiometr
R1150K (LIN) Potentiometr
R1850K (LOG) Potentiometr
R1, R2, R3, R1910K
R5, R7, R9, R1022K
R1268K
R13, R142.2K
R15330K
R16, R201K
R21, R22, R42300Ohm
R23, R24, R25, R26,?
R27, R28, R29, R30
100Ohm
R31, R32, R33, R34,?
R35, R36, R37, R38
220Ohm
R39, R40, R4147K
R43240K
L14.8 uH Inductor
LDR1VT90N2 LDR
LD15mm Tri-Color LED
SPK8 Ohm (8W) or 4 Ohm (10W) Speaker
C1, C18, C190.1 uF (25V)
C2, C310 pF
C110.22 uF (100V)
C16, C170.33uF (50V)
C4, C5, C6, C71uF (50V)
C13, C141uF (100V)
C910uF (35V)
C101000uF (35V)
C12220uF (35V)
C20100uF (35V)
C21470uF (35V)
TRN1600Ohm:600Ohm Isolation Transformer
SG1F/QMX Buzzer
RL1Shinmei RSB-5-S
RL2FANGKE JZC-23F
S1B3F-10XX-push on switch
S2M251 SPDT micro switch

Downloads

Alarm Eagle File download
Download Source Code

source: www.electronics-lab.com