user505: I have a project where I'm looking to power 120 RGB LEDs in a strip (WS2812B).
Obviously an Arduino Micro cannot supply this amount of current so I'm looking to use an external 5V/4A switching power supply (wall-wart) to power the LED's as well as the Arduino.
My question is, can I just split the power from the wall-wart providing 5v_reg directly to the 5V pin on the Arduino Micro and 5v_reg to the LEDs Vss?
It it necessary to use extra bypass capacitors in this case?

user4143: 
My question is, can I just split the power from the wall-wart providing 5v_reg directly to the 5V pin on the Arduino Micro and 5v_reg to the LEDs Vss?

Yes. As long as it is a clean regulated 5V supply.

It it necessary to use extra bypass capacitors in this case?

No.

505: <p>I have a project where I'm looking to power 120 RGB LEDs in a strip (WS2812B).</p>

<p>Obviously an Arduino Micro cannot supply this amount of current so I'm looking to use an external 5V/4A switching power supply (wall-wart) to power the LED's as well as the Arduino.</p>

<p>My question is, can I just split the power from the wall-wart providing 5v_reg directly to the 5V pin on the Arduino Micro and 5v_reg to the LEDs Vss?</p>

<p>It it necessary to use extra bypass capacitors in this case?</p>
 4143: <blockquote>
  <p>My question is, can I just split the power from the wall-wart providing 5v_reg directly to the 5V pin on the Arduino Micro and 5v_reg to the LEDs Vss?</p>
</blockquote>

<p>Yes. As long as it is a clean regulated 5V supply.</p>

<blockquote>
  <p>It it necessary to use extra bypass capacitors in this case?</p>
</blockquote>

<p>No.</p>
