1. Indian Institute of Technology Hyderabad INDEPENDENT PROJECT ELECTRONIC BLOOPERS

2. INTRODUCTION The propeller clock is a linear array of light emitting diodes, rotating at a high angular velocity to generate a circular screen. Now by synchronizing these light emitting diodes, and keeping in mind the concepts of persistence of vision and limit of resolution, we can display a clock. Persistence of vision: “What we see is a blend of what we are viewing and what we viewed a fraction of a second before”

3. PARTS Basically it consists of two parts: Rotating circuit board DC motor with power supply unit

4. COMPONENT DESCRIPTION COMPONENT LEDs8 CAPACITOR2 (22 pF) BATTERY1 (9 V) VOLTAGE REGULATOR1 (7805) RESISTOR1 (220Ω) MICROCONTROLERATMEGA8L-8PU CRYSTAL1 DC MOTOR1

5. MAKING  The biggest problem was the making of the hardware setup as the whole system had to be a light weight, evenly balanced and yet a strong one. Even slight variation of center of mass from the axle resulted in large scale wobbling of the system. Programming the microcontroller was not simple either. A lot of experiments were done to get proper display of characters We had some soldering practice when we made model of our project.

6. WORKING MODEL

7. Indian Institute of Technology Hyderabad Why We CHOSE THIS? We were always fascinated by the ideas of bloopers. Isn’t it amazing that how we could play with the limitations of man’s vision and could make him see what we want. This is the basic idea on which our project stands.

8. THANK YOU  We thank our faculty for letting us choose this topic so that we could pursue what interests us and think out of the bounds. Made by: RAHUL BUDHRANI (EE12B1027) AKASH SAHANI (CH12B1004)