Andreas Schleicher presents at the launch of What does child empowerment mean...
Presentation on path detector
1. BY:
SUJEET KUMAR JHA [12009]
MANISH KARN [12035]
AHMED RAJA KHAN [12432]
DEPARTMENT OF ELECTRICAL ENGINEERING
KATHMANDU UNIVERSITY
2. The main aim of this project to design and implement
the circuit which is used to detect the right path and
warn on deviating towards wrong path.
3. The main components of the electronics circuit
NE555 timer IC
LM324N COMPARATOR
MC74F08 AND gate
CAPACITOR 1000uf
POTS (100K)
RESISTORS
BUZZER
LEDs
LDR
4. NE555timer IC LM324N OP-AMP BUZZER
CAPACITOR
(1000uf)
POTS (100k)
MC74F08 AND
gate
6. Here the black surface is right path and white surface is
wrong path
The light sensor module consists of LDRs and LED
The emitter will throw light on the floor, whose reflection
will then be picked up by the LDR.
If the path is black, most of the light thrown will be
absorbed and very little light will be received by the
sensors. In this case warning led doesn’t not blink
7. .
•If the path underneath the sensor is white, most of the
light thrown by the emitter will be reflected and received
by the sensor. This will increase the voltage flow to
comparator and the stage at which the voltage cross the
reference voltage and and voltage supplies to led( blinks)
and input for AND gate.
8. If the right end of the model is deviates towards white
path the led at right most end will blinks.
If the left end of the model is deviates towards white path
the led at left most end will blinks.
If the whole model is in wrong path both led's will blink
accompany warning tone of buzzer.
The tuning of buzzer is obtained by and AND gate.
10. Children park, zoo, museum etc.
Safety measure in vehicles.
Guide for the blind person.
Automation and Robotics
11. March April May June July
Proposal and
presentation
Bread board circuit
arrangement
Testing and
Verification
Design in PCB
Modeling of Path
Detector
Assembling, Testing
and presenting of
Path Detector
Work completed
Work Remaining
12. We would like to acknowledge the department of
Electrical and Electronics Engineering for giving us
the golden opportunity to participate in the
engineering project.
We would also like to thank our Project Supervisor
Mr. Subodh Ghimire for his sincere guidance and
suggestions.