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DC Motor

Geared DC motors can be defined as an extension of DC motor which already had its Insight

details demystifiedhere.A geared DC Motor has a gear assembly attached to the motor. The

speed of motor is counted in terms of rotations of the shaft per minute and is termed as RPM

.The gear assembly helps in increasing the torque and reducing the speed. Using the correct

combination of gears in a gear motor, its speed can be reduced to any desirable figure. This

concept where gears reduce the speed of the vehicle but increase its torque is known as gear

reduction. This Insight will explore all the minor and major details that make the gear head and

hence the working of geared DC motor.

External Structure

At the first sight, the external structure of a DC geared motor looks as a straight expansion over

the simple DC ones.

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The lateral view of the motor shows the outer protrudes of the gear head. A nut is placed near

the shaft which helps in mounting the motor to the other parts of the assembly.

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Also, an internally threaded hole is there on the shaft to allow attachments or extensions such

as wheel to be attached to the motor

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IC L 293D MOTOR DRIVER

DESCRIPTION

The Device is a monolithic integrated high voltage, high current four channel driver designed to

accept standard DTL or TTL logic levels and drive inductive loads (such as relays solenoids, DC

and stepping motors) and switching power transistors.

To simplify use as two bridges each pair of channels is equipped with an enable input. A

separate supply input is provided for the logic, allowing operation at a lower voltage and internal

clamp diodes are included. This device is suitable for use in switching application at frequencies

up to 5 kHz. TheL293D is assembled in a 16 lead plastic Package which has 4 center pins

connected together and used for heat sinking The L293DD is assembled in a 20 lead surface

Mount which has 8 center pins connected together and used for heat sinking.

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ADVANTAGES

This is wireless controller robot hence the limitation of wired robots is completely

overcome by using latest technology of mobile phones.

In this project we have used RF circtury hance the limitation of a controlled range is no

more a constrain of this model.

Limitless area coverage is the main advantage of this land rover

DISADVANTAGE

This land rover has only one disadvantage that is it can be operated in area where

mobile network is available and if mobile network is not available it can not be operated.

APPLICATION

This land rover can carry any thing mounted on top it.

This can be fitted in an attractive form of a toy robo.

It can also be used to make mobile bomb by making some modification.

If we use the switching IC instead of the driver ic we can turn on and off any appliances

connected to this robot