SWITCHES

SWITCHES

              switch is mechanical device. It used to allow to connect two wire lines. it is very simple device and lots of applications. switch is used in every applications.

Push buttons

Every switches have minimum two leads. when we press the button the two leads lines are connected

SWITCH TYPES

         automation switches:

                 switches used in many automation functions. 

example:  

             DVD player door control is automatic switch. this switch was used to check door was completely closed or open or any error. when switch was close drive was start read the Disc 

          Push buttons switches:

                home Light control, computer key board control, mobile phone keypad and lots of more examples for Push buttons  

            

           Electronics switch

                  Relays, transistor ,Optocoupler are called electronic switches because this type of switches controlled by electronic pulses 

        1. Relays:

Relays

Download datasheet:

       CLICK HERE TO DOWNLOAD

  RELAY have 5 leads 

                              v1 & v2 is control pins

                               Common terminal is input pin

                               normally open and normally  closed pin

when we give power supply normally open was turn to close

when we give power supply normally close was turn to open

Applications of Relay:

                     Emergency light

                     stabilizer circuit

                     

Optocoupler :

                optocoupler is Electronics Switch Like relay. It have 4 pins. this device work based on optical light 

                 

 Pin description for optocoupler:

             

               1. Anode

               2. cathode

               3. Emitter

               4. collector

Download  datasheet:

CLICK HERE TO DOWNLOAD

LED light emitting diode

LIGHT EMITTING DIODE
      
       LED is basic level electronics component and LED have wide range of applications. LED used in digital clocks, TVs, trafic signals lights, Low power home bulbs and more......

 
LED have two pins
     1. positive
     2. negative

normally  long lead is positive
                 short lead is negative

LED types

size:
      0.5mm LED
      0.3mm LED
colors:
       all colors LED available
 
Multicolor LED:
                         2 pin (when give power supply glow in all colors )

                         4 pin (red,blue, green and conman GND pin    )
         
LED pin identification

In LED have large plate and small plate
                                               Large plate and Flat is always Cathode
                                               small plate is always Anode

      .
 



DATA SHEET DOWNLOAD:
                                          CLICK HERE TO DOWNLOAD


LED APPLICATIONS

 Display is one of best application of LEDs

mobile displays
TV displays
seven segment displays