The document presents a proposal for an adaptive lighting system for automobiles that uses an LDR sensor and relay circuit to automatically switch between headlights and lower beam lights depending on detecting incoming vehicle lights, including components like an NE555 IC, resistors, capacitors, LEDs, and relay, with the aim of improving safety and visibility during night driving without glare for other drivers. A circuit diagram and implementation plan are provided along with costs estimated at 190 BDT and discussions of the necessity and conclusions.

1. Submitted by
1. Sojal, Md. Jahidul Hasan 12-22626-3
2. Taufiquzzaman, Md. 14-25506-1
3. Islam, M. Jamiul 14-26006-1
4. Rahman, Md. Mustafizur 14-27279-2
5. Khan, Md. Tasdikul Islam 15-29210-1
Submitted to
Rethwan Faiz
Assistant Professor,
Department of EEE.
American International University-Bangladesh
Adaptive Lighting System for Automobiles

2. ADAPTIVE LIGHTING
SYSTEM FOR
AUTOMOBILES

3. CONTENTS
Introduction
Components
Block Diagram
Circuit Diagram
Implementation
Costs
Necessity
Conclusion
References

4. INTRODUCTION
Adaptive Lighting System for Automobiles is a smart solution for safe and
convenient night driving without the intense dazzling effect and aftermaths.
It detects itself whether there is light from the front coming vehicle or not.
When there is light from front coming vehicle, it automatically switches to
the downlight and when the vehicle passes it automatically switch back to
headlight.
The user can adjust the light detection sensitivity of this Adaptive Lighting
System.

5. COMPONENTS
IC: NE555 – 1
IC Socket 8 Pin – 1
Transistor: BC547 – 1
Diode: 1N4007 – 2
Resistors: 100K Trim pot – 1, 47K – 1, 22K – 1, 10K – 1, 1K – 2
Capacitors: 10uF/25V – 1, 100uF/25V – 1
LEDs: 5mm Red/Green – 2
LDR: 20mm Encapsulated Type – 1
Relay: 12VDC SPDT – 1
Switch: SPST Rocker Switch – 2

6. COMPONENTS (CONTINUED)
IC NE555

7. COMPONENTS (CONTINUED)
An LDR is a component that has
a variable resistance that
changes with the light intensity
that falls upon it. This allows
them to be used in light sensing
circuits.
LDR 20mm Encapsulated Type

8. COMPONENTS (CONTINUED)
DIODE 1N4007 TRANSISTOR BC547

9. BLOCK DIAGRAM

10. CIRCUIT DIAGRAM

11. IMPLEMENTATION
Proposed electrical wiring
diagram for existing
connection

12. IMPLEMENTATION (CONTINUED)
Proposed electrical
wiring diagram for new
connection

13. IMPLEMENTATION (CONTINUED)

14. COSTS
COMPONENTS BDT
IC: NE555 9
IC Socket 8 Pin 35.11
Transistor: BC547 1.5
Diode: 1N4007 1
Resistors: 100K Trim pot, 47K, 22K, 10K, 1K 9, 2, 1.5, 1.5, 1
Capacitors: 10uF/25V, 100uF/25V 1.2, 1.85
LEDs: 5mm Red/Green 1.2
LDR: 20mm Encapsulated Type 5
Relay: 12VDC SPDT 86
Switch: SPST Rocker Switch 15

15. NECESSITY
 To avoid or minimize accidental
possibilities at night driving
 Improved visibility in low light
condition, around curves and over
hills while driving.
 No manual operation is needed
to switch ON/OFF the
headlight/downlight
The light detection sensitivity is
adjustable by the driver

16. CONCLUSION
Adaptive Lighting System for Automobile is a must have device installed
in the headlight. It makes the night journey safer and more comfortable.
The cost of the device is not much higher. In our project, the estimated
cost was only 190.06 BDT.
So every automobile should have this device in its headlight.

17. REFERENCES
 Electroschematics.com. (2017). Adaptive Car Lighting System. [online] Available at:
http://www.electroschematics.com/8773/adaptive-lighting-system-for-automobiles [Accessed
12 Dec. 2017].
 Vaghela (2017). Adaptive lighting system for automobiles,by Dipak C. Vaghela,GEC,Bhuj….
[online] Slideshare.net. Available at: https://www.slideshare.net/RDIPAK99/adaptive-lighting-
system-for-automobiles [Accessed 12 Dec. 2017].
 Garden, H. and Hood, U. (2017). How Adaptive Headlights Work. [online] HowStuffWorks.
Available at: https://auto.howstuffworks.com/adaptive-headlight.htm [Accessed 12 Dec. 2017].
 Brainonboard.ca. (2017). Adaptive headlights - Driver assistance technology. [online]
Available at:
http://brainonboard.ca/safety_features/driver_assistance_technology_adaptive_headlights.php
[Accessed 12 Dec. 2017].