Blinky for Game Boy

Now you're playing with LED.

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What if your Game Boy could blink an LED? Wouldn't that be awesome and almost useful? You could communicate with your fellow friends using morse code and, if you stop the blinking for a while, you kind of kinda-sorta have a portable flashlight.

Now you're playing with LED!

  • Game Link Cable and connector pinout

    Sven Dahlstrand08/10/2018 at 21:18 0 comments

    Using the six-pin connector, a Game Link Cable and two Game Boys you can play against – or team up with – a friend. In this project, though, I'm making an LED obey my every command instead.

    |  2  4  6  |
    EXT connector on my Game Boy Color.

    My Game Boy Color names the six-pin connector EXT. It's located at the top left side and looks roughly like the above figure. I've numbered the pins from 1–6.

    Luckily for me someone has figured out the pinout already. I cut my Game Link Cable in half to figure which colored wire connected to which pin number, using the continuity test functionality of my multimeter:

    Pin #NameDescriptionWire color
    2SOUTSerial outBrown
    3SINSerial inGreen
    4SDNot usedYellow
    5SCKSerial clockBlue

    It looks promising! I've got +5V and ground for the LED and should be able to control it using the serial out and clock somehow.

    A closer look at the cable and connector.
    The multimeter hooked up to the cable and measuring +5V.

  • Blink an LED contest

    Sven Dahlstrand08/09/2018 at 18:08 0 comments

    I'm thinking about joining this blink an LED contest by MacroFab. The overall goal is pretty simple: build something that blinks an LED.

    This summer vacation me and my girlfriend went head to head in many Tetris matches. We played on our Game Boys using the Game Link Cable. Good times!

    Reading about the contest, I remember our gaming sessions and thought to my self: the Game Boy must be capable of blinking an LED. Right?

    In my head it looks something like this:

    My Game Boy should connect to an LED through a Game Link Cable and possibly some other electronic components. By writing a simple application and loading it to a flash cart, blinking light should be achievable. 

    Sound simple enough. :) Wish me luck! 

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