hi i have connected 100 leds in parallel and made a 11m strip of LEDs.
im planning to use the blink and fading functions on them.
but im not sure weather a digital pin of the Arduino UNO can handle this current and voltage needed for it.
i think we need a good LED as people told me we need a transistor for this
please tell me what transistor should i select for this.
thank you
i have connected 100 leds in parallel
Can we have a schematic?
You should not place LEDs in parallel. You place a resistor in series with a LED. That you repeat 100 times.
|\|
+V -+--/\/\/\/\------| |------+
| |/| |
| |
| |\| |
+--/\/\/\/\------| |------+
| |/| |
...
... 97 more
...
| |\| |
+--/\/\/\/\------| |------+
|/| |
|
GND
One LED will be about 10 to 20mA; an Arduino output can drive 40mA. You will not get very far 
Sorry for the crappy 'diagram'; getting my feet wet with Eagle but not ready yet to create a decent diagram 