Sensor System For Accidentally Locked Kids/Pets In Automobiles.

2. It’s a parents worst
nightmare: a young
child is left in a car

3. India Child Vehicular Heatstroke Deaths
2000
2003
2005
2007
2009
2010

4. HELP

6. PIR Sensor is used
for detecting any
living being in car.
COMPARATOR is used for
proving a uniform DC
signal.

7. PIR SENSOR
-
• Power Supply-3.5V-5.5V
• Coverage up to 5-6 feet or 2-3 meters
• Delay Time-8sec-15sec

8. COMPARATOR
• Name-LM-358(8 PIN IC)
• Power Supply-0.3V-10V
• Bandwidth-1MHz
0
1

9. CONTROL
 MICROCONTROLLER is used
for controlling the operations after
detection.

10. MICROCONTROLLER
• Name-AT89S52
• Power Supply-5V
• 3 Timers/Counters
• 8 KB of ROM
• 256 Bytes of RAM

11. PROTECTION
Buzzer and
Flash Indicator
to alert the
outside
people.
Air
Conditioner
to provide
temporary
relief.
GSM to send a message to the car owner.

12. BUZZER
&
FLASH-INDICATOR
• Buzzer is used for
alerting or warning.
• Flash Indicator is used
to give a more clear
indication.

13. • AC will be switched
ON with the help of
DRIVER
IC
• Name-L293D Motor Driver
• PINs 2 & 7 are INPUT Pins
• PINs 3 & 6 are OUTPUT Pins
• Voltage Supply-12V

14. G
S
M
• Power Supply-12V
• Bandwidth-933-960MHz
• Access Method-TDMA
• Modulation-GMSK
• Requires a Level Convertor since Power Supply
provides only 5V.

15. • NAME-MAX232 IC
• MAXIMUM OUTPUT -7.5V
• THRESHOLD VOLTAGE-1.3V
• OPERATES UPTO 120kbit/sec
• Two Drivers & Two Receivers
POWER5V
TXTIN TOUT
2 2 2
ROUT RINRX

16. POWER
SUPPLY
M
I
C
R
O
C
O
N
T
R
O
L
L
E
R
PIR
SENSOR
COMPARATOR
BUZZER
LEVEL
CONVERTER GSM
DRIVER
CIRCUIT
AC
FLASH
INDICATOR

17. • PIR SENSOR
• COMPARATOR-LM358
• MICROCONTROLLER-AT89S52
• GSM
• LEVEL CONVERTER-MAX-232 IC
• AIR CONDITIONER
• DRIVER IC-L293D
• BUZZER
• FLASH INDICATOR(LED)
• POWER SUPPLY

18. • Keil Compiler
• Embedded C