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INDEPENDENT PROJECT
ELECTRONIC BLOOPERS
Indian Institute of Technology
Hyderabad
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”
PARTS
Basically it consists of two parts:
• Rotating circuit board
• DC motor with power supply unit
COMPONENT DESCRIPTION
COMPONENT
LEDs
8
CAPACITOR
2 (22 pF)
BATTERY
1 (9 V)
VOLTAGE REGULATOR
1 (7805)
RESISTOR
1 (220Ω)
MICROCONTROLER
ATMEGA8L-8PU
CRYSTAL
1
DC MOTOR
1
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.
WORKING MODEL
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.
Indian Institute of Technology
Hyderabad
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)