Android: If you have an Android phone or tablet, it's easy to turn it into a portable console. Here's how to do it.
First, you'll need to find out if your device is OTG (on-the-go) compatible. This means you can control your Android device with a gaming controller by connecting them with an OTG cable. Do a quick Google search for your phone's make and model and "OTG support". You may see right away if your device is supported, but if not, CNet suggests using USB OTG Helper, a free root app that will tell you if your device is supported.
Once you know your phone supports OTG, you can grab a cable (shop around online). Then you can use it to connect your Android device and gaming controller via USB. Download and launch your favourite gaming emulator then play. You can even stream to your Chromecast device to play on the big screen, but a tablet is a good enough size for many games. The video above from buaydianway shows you what the final product looks like.