To protect laptop from thefts

1. «SMART»
!LAPTOP!
DOCKING
STATION

2. AIM:-
• To convert your ordinary docking station into a
smart electronic laptop docking station with
“ANTI-THEFT ALARM”.

3. COMPONENTS:-
• IC1:CNY70
• IC2:CD4060
• TRANSFORMER
• LED-2
• PIEZO BUZER
• TRANSISTOR
• RESISTORS&CAPACITORS

4. IC CNY70 is an integrated
reflective type opto-sensor
that contains photo
transistor and an infrared LED.
The LED emits infrared light &
the transistor works as a
receiver.The current flowing through
the photo transistor depends on the
intensity of light detected.
IC1:CNY70

5. FEATURES OF IC CNY70
• PACKAGE TYPE: Leaded
• DETECTOR TYPE: Photo Transistor
• PEAK OPERATING DIS: <0.5mm
• CURRENT UNDER TEST: 1mA
• EMITTER WAVELENGTH: 950nm

6. APPLICATIONS:-
• Daylight blocking filter
• Used in optoelectronic scanning and
switching devices i.e, index sensing,coded
disc scanning etc.,(optoelectronic encoder
assemblies).

7. IC2:CD4060
IC cd4060 is a
14 stage
ripple carry
binary counter.
The counter is reset to zero by a
gating +ve voltage at the reset
input independent of clock.

8. PIN DIAGRAM OF
IC:CD4060
Text

9. Features oF IC CD4060
• Wide supply voltage range:3.0V to 15V
• High noise immunity: 0.45VDD
• Low power TTL compatibility: Fanout of 2
driving 74L or 1 driving 74LS.
• Medium speed operation:8Mhz typ. At
VDD =10V.

10. *CIRCUIT DIAGRAM*

11. FUNCTIONING:-
• The working of the circuit is simple. When
the laptop is in the docking station, the
photo transistor inside IC1 receives the IR
light from the LED, reflected by the laptop
surface.
– The photo transistor conducts to make reset
pin 12 of IC2 high, so IC2 does not
oscillate.

12. When some one lifts up the laptop from
the docking station, the phototransistor
cuts off and pin12 of IC2 goes low. As a
result, IC2 starts oscillating. After a few
seconds, delay pin3 of IC2 goes high to
drive transistor T1. The Piezobuzzer
starts the beeping to raise an alert and
the LED2 glows to indicate that
someone has stolen the laptop from
the dockyard.

13. CONCLUSION:-
This laptop docking station can
be further develop with some
modifications……
With that modified security
station we can also protect the
externally connected peripheral
devices to the computer from
thefts.