Visiable Light is a robot that can sense and follow light. A user can shine a flashlight at its front and Light Rover will respond by following the light source. Light Rover uses a microcontroller for processing the sensor readings and responds by controlling the motors. The robot is designed with two sensors in mind, a left and a right. So when more light is detected on the left side, the robot will move towards it by rotating the right motor forward and the left motor backwards. The robot will know to move forward when both sensors receive about the same (by a margin we specify) amount of light. The robot has two bipolar motors attached to front wheels of the robot. While rear wheels do not have any motor attached to them. The robot has two sensors fixed at its front panel separated by sufficient distance. It has a power supply & microcontroller circuitry placed inside the Light Rover. We wanted to build a sensing light robot because microcontrollers are natural devices for sensing and responding to events.

1. Light Follower Robot
M.NAGARAJU
10U81A0440
UNDER THE GUIDANCE
OF
A.Nageswar Rao M.Tech

5. Introduction
• It is a robot that senses the
light & follows it. A user can
shine a flashlight at its front
and it will respond by following
the light source. This robot
uses a microcontroller for
processing the sensor readings
and responds by controlling
the motors & it can also be
designed without using micro
controller. So basically it is a
robot that responses according
to light.

9. TIUCRIC

13. P I N D I A G R A M

14. 14
Pin No Function Name
1 Enable pin for Motor 1; active high Enable 1,2
2 Input 1 for Motor 1 Input 1
3 Output 1 for Motor 1 Output 1
4 Ground (0V) Ground
5 Ground (0V) Ground
6 Output 2 for Motor 1 Output 2
7 Input 2 for Motor 1 Input 2
8 Supply voltage for Motors; 9-12V (up to 36V) Vcc 2
9 Enable pin for Motor 2; active high Enable 3,4
10 Input 1 for Motor 1 Input 3
11 Output 1 for Motor 1 Output 3
12 Ground (0V) Ground
13 Ground (0V) Ground
14 Output 2 for Motor 1 Output 4
15 Input2 for Motor 1 Input 4
16 Supply voltage; 5V (up to 36V) Vcc 1
PIN DESCRIPTION

17. • Battery: two pairs of 9V battery may
be required.
Battery holder: It is used to connect the battery
with the circuit.
Breadboard: One breadboard is used for
designing the circuit. The electronic
components are connected by inserting it in
the holes of the breadboard.

18. IC 7805: One IC 7805 voltage
Capacitor: Two 10uf capacitors are.
Castor Wheel: One castor wheel is mounted in
Gear Motor: Two 300rpm gear motors

19. IC L293D: One L293D IC motordriver
IC LM358: One LM358 IC voltage
Resistordark: One 2Ω&200Ω

20. LED: A 1.5V 200mA
Wires: Two meters of both two core and four
core wires will be required
Wheels: Two wheels (10cm dia.)

21. Application:- 1)Street lights
2)Alarm devices 3)Cameras
4)laptops

22. SOFTWARE TOOLS USED
• In-System Programming (ISP AVR studio IDE:

23. Advantage & Disadvantage:-
There is no specific advantage or disadvantage of this
technology it depends on the how this technology is used

24. http://www.aimglobal.org/technologies
http://www.bioauometricjournal.com/faq
http://www.technovelgy.com/ct/Technology-Article.asp
http://www.perada.eu/documents/articles-perspectives/an-introduction-to-rfid-
technology.pdf
http://csrc.nist.gov/publications/nistpubs/800-98/SP800-98_RFID-2007.pdf
www.ieee.org
http://www.zntu.edu.ua/base/lection/rpf/lib/zhzh03/8051_tutorial.pdf
http://www.taltech.com/TALtech_web/resources/intro-sc.html
http://focus.ti.com/lit/ds/symlink/max232.pdf
http://www.kmitl.ac.th/~kswichit/89prog/index.html
http://www.microdigitaled.com/8051/Software

25. THANK YOU