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    Question :
    what is 555 timer

    Posted by: ram pravesh on 5/13/2010

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    Category Electronics Interview Questions
    Rating (0.4) By 1561 users
    Added on 5/13/2010
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    555 timer is used to generate time delay and also used as counter

    Posted by: jayashankar    

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    The 555 Timer IC is an integrated circuit (chip) implementing a variety of timer and multivibrator applications.The 555 has three operating modes:MONOSTABLE,ASTABLAE,BISTABLE
    In the monostable mode, the 555 timer acts as a ?one-shot? pulse generator. In bistable mode, the 555 timer acts as a basic flip-flop.In astable mode, the '555 timer ' puts out a continuous stream of rectangular pulses having a specified frequency

    Posted by: SARANYA    

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    It is a 8 pin IC that has been out there for about 30 years. It was known as a National LM555 IC. It required about 4 or 5 resistors and caps.
    It once setup would toogle HI or LO for a given period of time. Common use for for a one shot or switch debounce circuit

    Posted by: Donn Washburn aka n5xwb    

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    yeah!!! its correct

    Posted by: harishsagar    

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    A 555 timer is an IC which can be used in different modes for different purposes:-
    Astable mode :- for producing square waves.
    Monostable mode :- TO produce a pulse whenever it is triggered
    Bistable Mode:-as a memory storage device
    Scmitt Trigger mode

    Posted by: Sandeep    

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    555 is an IC (Integrated Circuit)
    which is used to create square wave
    so this device is also called as timer IC,ie we can control the duration of the pulse...

    Posted by: Dina Chandran    

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    555 timer cannot be used as bistable multivibrator. can be used as astable and monostable

    Posted by: g anil kumar    

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    555 timer is used to generate time delay and also used as counter

    Posted by: goli    

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    It can be used to generate the pulse wave .

    Posted by: sathiyapriya ramesh    

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    Posted by: rohit mewar    

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