There are five main components to a portable system.
1) The Screen
2) The Game
3) The Controls
4) The Battery
5) The Enclosure
I used this
as my LCD screen because it was cheap, small, and accepts the right input.
I found this thing
at Goodwill for 2 bucks. Score!! :)
The A, B, and Pause buttons came from an NES controller. The Directional Buttons are these cute things.
The screen takes 12V, and the game takes 6V. Very different voltages (we will fix this later) and obviously you don't want 8 AA batteries weighing your handheld down! So I got a 12V rechargeable Li-ion battery from eBay.
I chose a RadioShack 6x3x2" plastic project box
because it is durable and easy to cut.
You also need a soldering iron, a hot glue gun, a dremel, and a drill.
Ready to begin? Let's roll.