Hey guys, What is the function of this ' Opto-isolator' actually ? Is it like a relay ??
V vick5821 Jan 22, 2012 700 Joined Jan 22, 2012 Messages 700 Oct 26, 2012 #1 Hey guys, What is the function of this ' Opto-isolator' actually ? Is it like a relay ??
Harald Kapp Moderator Moderator Nov 17, 2011 13,700 Joined Nov 17, 2011 Messages 13,700 Oct 26, 2012 #2 Some are, some not. An optoisolator is a transistor (typically NPN) whose base current is controlled by the light output of an LED. More light -> more base current. Google it. First hit (Wikipedia)
Some are, some not. An optoisolator is a transistor (typically NPN) whose base current is controlled by the light output of an LED. More light -> more base current. Google it. First hit (Wikipedia)
J Jotto Aug 24, 2012 120 Joined Aug 24, 2012 Messages 120 Oct 26, 2012 #3 They are used primarily to isolate one circuit from another. Find them in a lot of power supplies.
S shrtrnd Jan 15, 2010 3,876 Joined Jan 15, 2010 Messages 3,876 Oct 28, 2012 #4 Like Harald Kapp and Jotto said. It's primarily to isolate a higher voltage circuit, from a lower voltage circuit.
Like Harald Kapp and Jotto said. It's primarily to isolate a higher voltage circuit, from a lower voltage circuit.
(*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator Jan 21, 2010 25,510 Joined Jan 21, 2010 Messages 25,510 Oct 28, 2012 #5 Or where there is no common ground connection.