2. A differential
drive is the
most basic
drive to make
which consists
of two sets of
wheels that
can be driven
independently.

3.  To turn the vehicle (or robot) the LEFT and RIGHT
wheels are rotated at "different" speeds or in “different”
directions.
Motion LEFT Wheel RIGHT Wheel
Forward Counter Clockwise Clockwise
Backward Clockwise Counter Clockwise
Rotate LEFT Clockwise Clockwise
Rotate RIGHT Counter Clockwise Counter Clockwise

5. Components:
 Power Supply‐ Transformer and
rectifier circuit
 Motors
 Control box
 Chassis

6. Power Supply:
Our power supply consists of the rectifier
circuit and the transformer.
A rectifier is an electrical device that
converts alternating current (AC), current
that periodically reverses direction, to direct
current (DC), current that flows in only one
direction.

7. Transformer:
A transformer is a device that transfers electrical
energy from one circuit to another through inductively
coupled conductors.
To make a simple differential drive, a simple
transformer with following specifications can be used:
1 Amp, C.T. ‐12 V.

8. Transformer:

9. Rectifier circuit:
Our power supply consists of the rectifier
circuit and the transformer.
A rectifier is an electrical device that
converts alternating current (AC), current
that periodically reverses direction, to direct
current (DC), current that flows in only one
direction.

10. POWER SUPPLY (RECTIFIER
CIRCUIT)

11. THE RECTIFIER CIRCUIT

12. Bridge Rectifier circuit:

13. USES OF RECTIFIER CIRCUIT
 Rectifier circuit is used to convert Alternating Current
to Direct Current.
 We get Alternating Current as Power Supply in our
homes, but electronic components in robots use Direct
Current.

14. Power Supply Circuit

15. Motors:
Motors used to make differential drive robot are the
simple DC motors .
Though we can use motors used in toy cars for our
purpose .

16.  Electrolytic capacitors have to be connected keeping
in mind the polarity
 Shorter terminal is negative

17. Control box:
 To control the locomotion of the robot, we need a
control box. It comprises of two push‐button switches
and two two‐way switches. Another method is to use
two three way switches for the two motors.
 Connections can be made in such a way that the left
switch gets connected to the left motor and the right
switch gets connected to the right one.
Multi strand wires can be used to connect the motors
and the switches.

18. Push‐button switch: Two‐way switch:

19. 3 Way Switch Circuit

20. Chassis:
The chassis (and the wheels) can simply be cut out
from the toy‐cars easily available in the market by
separating the lower part of the car from the upper one
and removing the gear box from it.
For more details, please refer to the link:
http://www.youtube.com/watch?v=kFoGBIqIqoM
HAPPY BOT MAKING!!!

21. Thank you