How can I power a servo and Arduino from the same power supply? I have an ESP8266 NodeMCU which I'm using for an automatic blinds project. The NodeMCU struggles to power the servo on its own, so at the moment I am using a 5&nbsp;V supply for the servo and a USB cable for the NodeMCU (with a common ground). 

The servo is an inexpensive MG996R which is rated up to 7.2&nbsp;V I've read that NodeMCU can take 5-10&nbsp;V on the VIN pin. 

After I'm done prototyping, I want to only use one power supply. What could I use? Ideally it would be something with just a wall adapter and then I can cut the other and connect that to servo and MCU.
Wire the +5 and Ground from the supply to both the ESP's Vin &amp; Ground and the servo's Vin &amp; Ground. The only thing you have to avoid is trying to power the servo through the ESP.