This document describes a student project to generate electricity from cycling. A bicycle was outfitted with gears connected to an alternator to produce electrical power from pedaling. The alternator generates 12V DC power that is stored in a battery. An inverter can then convert the DC power in the battery to 220V AC power for small household appliances. The project aims to allow people to power devices through exercise and reduce electricity bills. While successful in reaching high speeds, further adjustments are needed to output a full 12V for battery charging.

1. ELECTRICITY GENERATION
THROUGH CYCLING AS EXERCISE
UNDER THE ESTEEMED GUIDANCE OF
MR. L SHIVA KUMAR
(Asst professor)
SUBMITTED BY
1. 13PC1A0381
2. 13PC1A0352
3. 13PC1A0398
4. 13PC1A0354
5. 13PC1A0372
6. 14PC5A0331

2. ABSTRACT
• The purpose of this project is to design, build, and
be able to present a mechanism that will produce
AC power using the mechanical energy produced
by a person pedaling a standard bicycle.
• The bicycle carries the gear mechanism and the
alternator is finally connected to the mechanism

3. • The 12V DC power produced by the alternator is
saved in the battery .
• The DC Power saved in the battery can be
converted into 220V AC by the use of inverter
and can be used for household minimum
electrical applications.

4. EXISTING MECHANISMS
THESE ARE SOME OF THE MECHANISMS WHICH
USES BELT DRIVES OR CHAIN DRIVES

5. • CYCLE FRAME
• SHAFTS FOR THE GEARS AND PEDALS
• GEARS (FLYWHEEL AND SELF STARTER
GEAR )
• ALTERNATOR
• BATTERY
• BEARINGS (ZZ 6202)
• CYCLE STANDS (FOR BACK AND FRONT )
COMPONENTS USED IN OUR
PROJECT

6. SHAFTS FOR THE GEARS AND
PEDALS
• We are using three types of shafts
• A shaft for pedals where the flywheel gear is
meshed with the self starter gear
• Another shaft which has a internal hole for the
bearing and a step for the second self starter gear
which is on the same shaft welded to flywheel gear

7. • A shaft for the assemble of bearing the alternator
shaft and the last self starter gear meshed with
the flywheel gear of the second shaft.
• Two hubs are also made for the bearings, so the
welding and the alignment of the gears is
possible on the frame

8. CYCLE FRAME
• We are using a cycle frame without any
wheels as it’s in a stationary position
• The cycle frame consists of handle,
pedal,seat and the overall frame.

9. GEARS
We are using two types of spur gears in our project
1. BIG GEAR WHICH IS THE FLYWHEEL OF A
CAR
2. SMALL GEAR WHICH IS ON THE SELF
STARTER OF THE CAR

10. FLYWHEEL OF A CAR
• The gear is welded
to a solid shaft of
48mm diameter in
the center and then
rods are welded to
the solid shaft and
the flywheel.
• It has 96 teeths
Dimensions
Outer dia 265mm
Inner dia 215mm
Pitch circle 240mm

11. SMALL GEAR
• The small gear assembly is cut and only the gear is
taken.
• It has 8teeths with a ratio of 1:12 ratio with the big
gear
• One gear is fixed to the flywheel gear on the same
shaft
• The other gear is on the alternator shaft.
• Dimensions
• Inner dia 20.5mm
• Outer dia 25.5mm
• Pitch circle 23mm

12. ALTERNATOR
• The car alternator in our project produces 12v
output voltage
• It gives the maximum output when its shaft
rotates with 2500rpm.
• The produced electricity is then connected to the
battery and the electricity can be stored in the
battery

13. BATTERY
• The battery has a capacity of
312watts.
• It gives an output of 12v and
26amperes of current.
• The battery gives DC current as
the output.
• The output voltage is DC which is
to be converted into AC by using
or power inverter for 220v of AC
output

14. BEARINGS
• The bearings, we used in our project is ZZ 6202.
• Totally, three bearings are used in our project
• Two of the bearings are used on the alternator.
• The other bearing is used for the second shaft
connected to the small gear and the big gear .

15. CYCLE STANDS
• As we are not using the wheels of the cycles, so
for the base we are using two stands,
• One in the front to stop the rotation of the
handle.
• The back stand is to lift the person on the seat.

16. POWER INVERTER
• Inverter is to be used to convert the
produced DC to AC
• But in our project we are just showing the
DC voltage produced from the alternator
and the DC output from the battery

17. SPEED VARIATION
• The gear ratio is maintained as 1:144 i.e..,
if a person pedals one time, then the
alternator shaft rotates 144 times.
• So if the person pedals 20times a minute
in an average.
• The speed of the alternator shaft would be
2880rpm.
• The max output from can be obtained at
2500rpm itself.

18. ADVANTAGES
• We can generate electricity at home and
so the monthly current bills can be
reduced.
• A person doing the exercise can stay
healthy
• We can run fans and lights with this, we
can charge laptops, mobiles etc.

19. RESULT
• Our project is successful for the speed, as
we are getting a speed of 3000rpm
• We are getting 5volts of DC current, which
can be stored in the battery.
• Some necessary changes has to be done
for an output of 12volts and the battery
indication circuit has to be done

20. OUR PROJECT WITHOUT ANY BATTERY
CONNECTIONS