Post on 08-Apr-2015
description
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