user53556: Is it possible to Power a Arduino Mega 2560 and a NodeMCU V2 ESP8266 ESP-12E from a single 9V Block?
What would be the best solution?

Can i power the ESP8266 directly via the Arduino Mega 5V output? (3.3V Output seems to weak)
Is a Power Converter like this for the ESP8266 necessary?
Should i use another external Power source for the ESP8266?

Thanks for any Help :)

user4143: 
Is it possible to Power a Arduino Mega 2560 and a NodeMCU V2 ESP8266 ESP-12E from a single 9V Block?

Yes. Assuming the "block" can provide enough current.

Can i power the ESP8266 directly via the Arduino Mega 5V output? (3.3V Output seems to weak)

No.

Is a Power Converter like this for the ESP8266 necessary?

Yes if you are powering it from more than 3.3V.

Should I use another external Power source for the ESP8266?

Not necessary if the 9V one can provide enough current as I mentioned above.

53556: <p>Is it possible to Power a Arduino Mega 2560 and a NodeMCU V2 ESP8266 ESP-12E from a single 9V Block?</p>

<p>What would be the best solution?</p>

<ul>
<li>Can i power the ESP8266 directly via the Arduino Mega 5V output? (3.3V Output seems to weak)</li>
<li>Is a Power Converter like <a href="https://rads.stackoverflow.com/amzn/click/com/B01MQGMOKI" rel="nofollow noreferrer" rel="nofollow noreferrer">this</a> for the ESP8266 necessary?</li>
<li>Should i use another external Power source for the ESP8266?</li>
</ul>

<p>Thanks for any Help :)</p>
 4143: <blockquote>
  <p>Is it possible to Power a Arduino Mega 2560 and a NodeMCU V2 ESP8266 ESP-12E from a single 9V Block?</p>
</blockquote>

<p>Yes. Assuming the "block" can provide enough current.</p>

<blockquote>
  <p>Can i power the ESP8266 directly via the Arduino Mega 5V output? (3.3V Output seems to weak)</p>
</blockquote>

<p>No.</p>

<blockquote>
  <p>Is a Power Converter like this for the ESP8266 necessary?</p>
</blockquote>

<p>Yes if you are powering it from more than 3.3V.</p>

<blockquote>
  <p>Should I use another external Power source for the ESP8266?</p>
</blockquote>

<p>Not necessary if the 9V one can provide enough current as I mentioned above.</p>
