Thursday, October 6, 2011

What is Pcb in electronic?



Pcb stands for Printed Circuit Board And it is also called printed wiring board.
Pcb is a printed board.Copper pathways are printed at board for passing of electrical signals(current)from one component to another.Pcb is a collection of electronic components that can be assembled at upper side of a pcb.Copper pathways and tracks provides signal from source to these electronic components.

Sunday, August 21, 2011




DOCTOR MOHAN KUMAR

UJT?


UJT STANDS FOR UNIJUNCTION TRANSISTOR.UNIJUNCTION TRANSISTOR IS USED TO GENERATE PULSE,CONSIST OF EMITTER AND B1 AND B2.UNIJUNCTION TRANSISTOR IS CALLED UJT BECAUSE UJT HAS ONE JUNCTION.
UJT IS AN ACTIVE DEVICE BECAUSE IT REQUIRES TO SUPPLY EXTERNAL VOLTAGE.UJT PROVIDE CURRENT WHEN TRIGGERING VOLTAGE IS ACHIEVED.
UJT SYMBOL IS REPRESENTED ABOVE.

UJT CHARACTERISTICS

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