How to properly eject sdcard on android

Depending on the model, some android smartphones might have hot swappable external sdcard, means you can remove the external sdcard without turn off the phone/remove the battery.

How to create android surveillance camera

Did you know that you can turn your android smartphone into a surveillance camera, almost like CCTV camera.

In this article i will show you step by step how to create a surveillance camera using android smartphones.