A light dependent resistor (LDR), or photoresistor, is an electronic component that alters its resistance based on light intensity. While LDRs are cost-effective and widely used in applications like automatic lighting and security systems, they have disadvantages such as non-linear response and slow reaction time. It is crucial to evaluate the pros and cons of LDRs before utilizing them in specific projects.

1. DEPENDE
NT
RESISTO
R
By:
V.Sai Susritha-22N81A6605
A.Mithra-22N81A6604
K.Saathwika-22N81A6605

2. WHAT
IS AN
LDR?
A light dependent resistor (LDR), also
known as a photoresistor, is an
electronic component that changes its
resistance based on the intensity of
light falling on it. The resistance of an
LDR decreases as the intensity of light
falling on it increases, and vice versa.

3. CONSTRUCTION

4. HOW DOES AN LDR
WORK?

5. CHARACTERISTICS OF
LDR
Resistance
01
Sensitivity
02
Dark
Resistance
03
Operating
Temperature
04
Power
consumption
05
Spectral
Responses
06

6. ADVANTAG
ES
Easy to Use
Low Cost
Wide Range
High Sensitivity
Low Power
Consumption

7. DISADVANTAGES
Non-Linear
Response.
Slow Response
Time
Low Precision
Limited Range
Environmental
Factors

8. APPLICATIO
NS OF LDR
Automatic Lighting
Cameras
Security Systems
Industrial Automation
Consumer Electronics
Solar Power Systems
Agriculture
Smoke detector
These devices are used where
there is a need to sense the
presence and absence of light
is necessary. These resistors
are used as light sensors and
the applications of LDR mainly
include alarm clocks, street
lights, light intensity meters,
burglar alarm circuits.

9. CONCLUSION
Overall, while LDRs are a useful technology, they may not be the
best choice for every application. It's important to carefully consider
the advantages and disadvantages of LDRs before selecting them
for a particular project or application.

10. THANK YOU