building transistor as a switch

[uvaraj6]

hi friends i want to design a switch using transistor...

can any body help by providing some circuit.. and help me...

 

[barath_87]

use a MOSFET (give your control input gate that will allow signal to flow from drain to source(nmos))and be carefull if you are going to drive a relay you will have to put a free wheeling diode....You can refer to any website or books on electronic devices boyelstead or sedhra & smith

 

[amriths04]

where exactly do you want to put in your switch? is it a critical component in your circuit?

 

[A.Anand Srinivasan]

check out this link....
https://www.google.co.in/books?id=b...nics&sig=9BJaNHRuoy_HhqHtjHpYgmzgpZg#PPA63,M1

it has the circuit and a clear description of what is to be done....