Hello,
i have checked all things. i have disconnected the base resistor from the base of the transistor and checked the votages at the end of the resistor, the voltage is 0. and while the base of the transistor is not connected to anything, i shorted the base and collector of the transistor then all the 9 LEDs are glowing till base-collector is shorted. mean LEDs are fine and transistor is also fine. But the output from the microcontroller is always low (this seems to me). But when i first time turned the analog mode on, the 9 LEDs were glowing at that time very lightly. But now They are not glowing. please check it? i have uploaded all the things on page 1 of this forum.
Thanks a lot