Assuming you mean 100mA, the bc337 or similar will be fine. Try a 2K2 resistor between the Arduino pin and the transistor base.
Does this led have built-in current limiting? If so, you won't need a series resistor. Post a link and we can check.
Assuming you mean 100mA, the bc337 or similar will be fine. Try a 2K2 resistor between the Arduino pin and the transistor base.
Does this led have built-in current limiting? If so, you won't need a series resistor. Post a link and we can check.