If you have an old broken NES lying around and have no idea what to do with it, you may want to check out [snoius's] latest project. He replaced the guts of his old NES with a Raspberry Pi. [snoius] started out by removing most of the electronics from his original NES to make room for the Pi. He left the original control panel board so he would be able to use the original power button and power LED. The NES power switch is an on/off toggle switch. [snoius] decided to just route the 5V USB power input directly through this switch. The result is a hard power switch for the tiny computer. The original power LED is wired up to the Pi’s 3.3V GPIO header through a 330 ohm resistor. Now when the Pi has power, the LED lights up.
The next step was controllers. It looks like [snoius] is using some USB SNES controller clones. He wanted to use the original NES controller ports but obviously the NES did not utilize USB. [snoius] used a saw to cut the backs off of the controller ports, leaving a flat surface. He then used a utility knife to carve out a hole in the shape of a female USB port. He mounted some ports in place and then wired the inside up to some short USB cables with male ends. These were plugged into a USB hub that is hidden inside of the NES case.
The Pi is also hooked up to a short HDMI cable and a short power cable. The loose ends of the cables are mounted to a small block of wood. Notches are cut out of the wood to better fit the cable ends. The rear of the NES has two holes cut out where the original connectors used to be in order to accommodate the new connectors.
With all of the hardware taken care of, [snoius] still needed a way to actually play his games. That’s where RetroPie saved the day. RetroPie is a Linux distribution for the Raspberry Pi that is specifically created to make it easy to play old video games. It includes emulators for many old systems including NES, SNES, SEGA Genesis, Gameboy, etc. [snoius] installed RetroPie onto an 8GB SD card and copied over all of the ROMs he could find. The end result is what appears to be an original NES at a glance, but is in fact multiple retro gaming systems in one. It also contains hundreds of video games in on board memory instead of requiring a large library of physical cartridges.
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