An optocoupler is an electronic device that transfers electrical signals using light waves, providing electrical isolation between the input and output. It splits or combines transmission data from optical fibers. Optocouplers are categorized based on factors like the number of channels, operating temperature, output voltage, isolation voltage, and packing time. They have various applications, with photoresistor-based optocouplers used in audio due to their linearity, and most providing medium speeds for uses like electroencephalography. High-speed optocouplers are used for computing and communication applications.

1. OPTO COUPLER
PROJECT BY
M.N.POOMAGAL PADMASHREE

2. 2
OPTOCOUPLERS

3. OPTO COUPLER IS DEFINED AS
 An opto-coupler also called as opto-isolator or
photolaser is a passive component that can split or
combine transmission data (optical power) feom
optical fiber.
 It is an electronic device which is designed to
transfer electrical signals by using light waves in
order to provide coupling with electrical isolations
between the input and output.

4. CATEGORISATION OF TYPES :
 There are many different types of optocoupler the
common types are categorised up on the :
 No of channels
 Operating temperature
 Output voltage
 Isolation voltage
 Packing time
 Current transfer ratio

5. APPLICATIONS OF OPTO-COUPLER
 Photoresistor based opto-isolators are the slowest
type of opto-couplers,but also the most linear
isolators and are used in the audio and music
industry.
 Most opto-isolators available use bipolar silicon
phototransistor sensors and reach medium data
transfer speed which is enough for applications
like electro-encephalography

6. HIGH SPEED AND OTHER APPS :
 High speed opto-isolators are used in computing
and communication applications.
 Other applications :
 photo copiers
 Industrial automation
 Professional light measurement instrument
 Auto-exposure meters

7. THANK YOU !!!