ELECTRONIC CARD-LOCK SYSTEM

By

Mohd. Ansari Ajmal

Shahul Hameed M K

Visakhan C

FUNCTION

• To lock important electronic/electrical appliances.

• By the insertion of appropriate cards, appliances can be turned ON.

• Turn OFF upon removal of the card.

• Can switch up to 7 appliances.

FEATURES

• HIGH SECURITY

• OPERATION IS SIMPLE AND USER-FRIENDLY

• COMPACT DESIGN

• ENSURES SAFETY OF USER

DESIGN

BLOCK SCHEMATIC DIAGRAM

SENSOR ARRAY BUFFER

RELAY

DRIVER RELAYSEXTERNAL APPLIANCES

LIGHT SOURCE

INSIDE THE EQUIPMENT

DESIGNSENSOR ARRAY +5v

GND

O/p 1

O/p 2

O/p 3

O/p 4

O/p 5

O/p 6

O/p 7

TO BUFFERSENSOR UNIT

+5V

GND

O/p

DESIGNBUFFER

+5V

GND

IN1IN2IN3IN4IN5IN6IN7

ENABLE

OUT1OUT2OUT3OUT4OUT5OUT6OUT7

FROM SENSORS

TO

RELAY DRIVER

DESIGNRELAY DRIVER

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

Vcc = 12V

IN1

IN2

IN3

IN4

IN5

IN6

IN7

GND

ULN 2003

FROM BUFFER

TO RELAYS

CIRCUIT DIAGRAMSENSOR ARRAY

BUFFER RELAY DRIVER

RELAYS

WORKING

DIRECTION OF INSERTION

Punched hole

CARD LAYOUT

POSSIBLE POSITIONS OF HOLES NOTCH

WORKING

EXAMPLES OF CARDS

WORKING

PCB LAYOUT

PRODUCT LAYOUT

Power Switch

Status LEDs

Slot