is and 548 transistor 9v i like to make wireless leds guide me will you
Split from: BC548 3.3V
Welcome to AVRFreaks.
I am afraid that I do not understand what you want to do.
And your question does not appear to be about this thread/topic so I will create another one for you.
The BC548 is a general-purpose NPN bipolar junction transistor commonly used in European and American electronic equipment. It is notably often the first type of bipolar transistor hobbyists encounter, and is often featured in designs in hobby electronics magazines where a general-purpose transistor is required.[1][2][3] The BC548 is low in cost[4][3]and widely available.
Manufacturer Information on BC548: http://www.onsemi.com/PowerSolut... - marked as "obsolete".
Datasheet: http://www.onsemi.com/pub/Collat...
So what more do you need to know?