how to stop android emulator from automatically turning off

Question

I am using the SDK provided from the android developers website. My android emulator seems to turn off automatically after some period of inactivity. I need to press the power hardware button provided next to the emulator screen to be able to run applications again. The problem is that I don't know what enabled this feature. This doesn't happen in the other computers where I have installed the SDK. The only difference in this computer's installation is that I had updated the SDK to include Android 4.3 APIs.

How do I stop the emulator from automatically turning off?

---EDIT---
Create new AVD screen in the SDK

Answer 1

I have this problem because I changed the Charger Connection to none under the Battery menu of the emulator. Turning it back to AC Charger stopped the screen being turned off.

Answer 2

In your emulator go to Settings -> Display -> Sleep, change to 30 minutes.