AUTOMATIC ROOM LIGHT CONTROLLER WITH VISITOR COUNTER
By
Author
Presented To
Department of Electrical/Electronic Engineering
ABSTRACT
The fear of theft and burglary always annoys many people. When lock and keys become less safe, one can seek the help of electronic security systems.
Such a portable security system is described here.
This electronic setup auto activated whenever the intruder enters to the unauthorized no entry area. It auto activate the landline number and redial the last dialed number from the conventional telephone. All we need is to do minor changes to activate this telephone as it works as to become auto dialer circuit.
Thus whenever the intruder enters to the area, it activates the sensor circuit of either sound activation or infrared light beam obstruction circuit, the redial circuit become active and give a ring tone to the receiving end. It may be a mobile phone or any landline phone or even police control room.
TABLE OF CONTENTS
SNo Contents Page No
Certificate…………………………………………………iii
Abstract…………………………………………………… iv
Declaration………………………………………………… v
Acknowledgement…………………………………………vi
1 Introduction…………………………………………………1
2 Block diagram and its description - - - - - - - 2
21 Basic block diagram…………………………… - 2
22 Block diagram description……………………… 3
3 Component used-Part A……………………………………6
31 Voltage Regulator………………………………6
32 NE555 Timer………………………………… - 10
33 Rectifier…………………………………………18
4 Circuit Description…………………………………………23
41 Transmission circuit…………………………… 23
42 Receiver circuit…………………………………24
5 Hardware Design and description……………………… - 26
6 Circuit Description-Part B…………………………………28
61 TSOP1738 …………………………………… - 28
62 555……………………………………………… - 29
63 LTS542(7 Segment Display)…………………… - 31
64 LM7805(Voltage Regulator) ……………………32
65 Relay Circuit………………………………………33
66 Capacitor…………………………………………33
67 Diode………………………………………………35
68 Resistor……………………………………………38
69 Light Emitting Diode …………………………… - 40
610 Printing Circuit Board …………………………… 46
7 Flow Chart…… ……………………………………………49
8 Testing & Result…………………………………………… 51
9 Future Scope……………………………………………… - 52
10 Applications…………………………………………………53
11 References……………………………………………………54
LIST OF FIGURES
S No Figure Name Page No
1 Block Diagram of Visitor Counter ………………………………2
2 Pin Diagram Of 74LS192 …………………………………………4
3 NE 555Timer …………………………………………………… - 10
4 555 In Bistable Mode ……………………………………………14
5 Standard 555 astable Circuit …………………………………… - 15
6 Full-wave rectifier using a center tap transformer ……………… - 19
7 Full-wave rectifier, with vacuum tube …………………………20
8 Disassembled automobilealternator ………………………………22
9 Three-phase full-wave bridge rectifier circuit ……………………23
10 Transmitter circuit ……………………………………………… - 24
11 Receiver circuit ……………………………………………… - …26
12 Snapshot of the entire circuit ……………………………………28
13 Infrared Sensor ………………………………………………… - 29
14 Block Diagram of TSOP 1738 ……………………………………29
15 Timer IC(555) ……………………………………………………29
16 Segment ……………………………………………………………31
17 Voltage Regulator …………………………………………………32
18 Relay ………………………………………………………………33
19 A diode's I–V characteristic ………………………………………35
20 LEDs ………………………………………………………………37
21 FLOW CHART ………………………………………………,,,…49
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