“To design, test & develop portable mini hand electricity generator.”
To study electricity.
To study dynamo meter.
To study Motor & Generator.
To study advantages & applications of motor.
To design a mini electricity generator.
To design a battery charger.
To develop a portable mini hand generator.
ON / OFF Switch
Two in One Button
Principle of Mini Generator:
This is an AC electric generator which lights up a Light Emitting Diode
(LED). The generator is made from a mini AC motor. I wrote this article because
I found lots of projects for making a simple electric motor, but nobody gave the
secret for making a generator. Well, here it is: mini AC motor and a special LED
which only needs 1 volt light up.
Also, don’t bother making a “commutator,” I have used rectifier circuit to convert
AC voltage into DC voltage for the LED.
Electrical power generators, also known as alternators, transform mechanical
energy into electrical energy. They can be used for backup or emergency
power. Generators can produce either AC or DC power and are typically powered
by a fuel engine.
A device used to convert mechanical energy into electrical energy.
Mechanical motion turns the armature which creates current.
Many AC motors can function as a generator.
- Construction of project:
The generator is made from mini AC motor with a gear system.
Step- 1: Take Mini AC motor with a gear system and tight fit handle to rotate the
AC motor which acts as generator.
Step- 2: Take the two wires from mini AC motor terminals.
Step- 3:Connect the two wires from mini AC motor terminals to Rectifier circuit made up of two diodes, which rectifies the AC voltage of generator (Converts AC voltage into DC voltage).
Step- 4: Connect the DC voltage output of rectifier using two wires to the LED
with proper polarity.
Step- 5:Connect gear shafts of mini AC motor to handle.
Step- 6: Move the handle rapidly to rotate the mini AC motor.
Step- 7:The mini AC motor will work as a generator and LED will light showing generation of electricity.
How a generator works
A generator works by a magnetic field inducing a voltage into a coil of motor.
Important points to note are that the voltage increases as the number of turns of wire
on the coil, the size of the coil and the strength of the magnetic field increases.
The magnetic field (or the coil) needs to be in constant motion to produce/induce
the electricity into the coil. This can be done by moving the rotor of motor.
The rotor needs to move in such a way that the coil continually passes through
the magnetic field. The mini AC motor will work as a generator. The turning shaft
of the rotor of mini AC motor with help of handle transfers the mechanical energy to
rotate the mini AC motor which acts as a generator to generate the electricity
(works on Faradays Law).
When a rotor of mini motor is rotated with help of handle, it induces an AC voltage into the coil of motor. The generator produces electricity that will light up the light bulb – generation of electricity can therefore be simply demonstrated.
1 Output voltage: 7V
- Output current: 80m A
- Output power: 0.56 W
This is very simple generator described above is primitive but shows the
basic operation. It has been deliberately left as simple as possible so that there
is maximum scope for using it in imaginative designs and inventions.
It can therefore form the basis for a more complex device as shown a little further
- This mini hand crank generator is used to the emergency light, human
power mobile charger, hand crank radio etc.