This document discusses transducers and resistive transducers. It defines a transducer as a device that converts one form of energy into another, such as converting electrical energy to sound in a microphone. Transducers are used to measure physical quantities by converting them to electrical signals. Resistive transducers operate based on changing resistance and include potentiometers, resistive position sensors, pressure sensors, strain gauges, thermistors and light dependent resistors. Potentiometers specifically work by varying voltage levels through the motion of a sliding contact along a resistive element.

1. -by Shashank Vaidya.

2. What is a Transducer????
 It is a one, which converts one form of energy into
another form. Ex- microphone(electrical ->
sound),solar cell, lamp etc.
 Transducers are devices which for the purpose of
measurement convert physical input quantities into an
electrical output signal.

3. Transduction principle
 Resistive, Capacitive, Inductive
 Primary Input quantity
 Voltage, current, temperature, force, pressure etc..
 Material and technology
 SMT (Silicon Micro technology), MEMS(micro
electromechanical system)

4. RESISTIVE TRANSDUCERS
 Major types of Resistive transducers
• Potentiometers
• Resistive position transducer
• Resistive pressure transducer
• Strain Gauges
• Thermistors
• Light Dependent Resistor (LDR)

5. Potentiometers(POTs)
 Passive transducer.
 Resistive element.(graphite)
 Sliding contact-wiper.
 Motion of the sliding contact – translatory / rotational
movement or combination of both(helipots)
 Translatory-Used to vary the voltage levels.
 Rotational-angular displacement.

9.  Advantages
 Less cost
 Simple to operate
 More effeciency.
 Disadvantages
 Large force required to
move sliding contacts
 Wear n tear of sliding
contacts.

10. RESISTIVE POSITION
TRANSDUCER.
 Operating principle-a quantity to be measured causes
a resistance change in the sensing element.

12. Queries ?
 Thank you……………!!!!!!!!