Use Your Game Boy As A Wireless Controller

January 2, 2019 by Lewin Day 11 Comments

Like many retro favourites, the Game Boy is in no way dead — development continues apace through its many fans.But what about the hardware side? This is a particularly interesting one: [Alex] wondered if a Game Boy could be readily used as a wireless controller. Set out to make it happen, the final product is a game cartridge that makes the classic handheld a wireless controller.

It’s achieved quite elegantly, with a custom cartridge used to turn the Game Boy into a controller while requiring no modification to the handheld. The cartridge contains a flash chip to store the ROM, along with an ATmega48PA microcontroller and an NRF24L01 to do the talking. Upon powerup, the Game Boy runs code from the ROM, and the microcontroller is in charge of reading button states and sending them to the NRF24L01 for transmission. The program stored on the ROM also allows configuration changes to be made from the Game Boy itself, such as choosing the appropriate wireless channel.

The cartridge transmitter can be used with a variety of receivers. [Andy] has developed a USB HID joystick emulator to allow the Game Boy to be used with PCs, as well as a receiver for the GameCube, too. Yes, that’s right — you can now play Super Smash Bros. with a weirder controller than all your friends. A Super Nintendo version is also in the works. Perhaps the coolest feature, however, is that the cart can use its radio link to communicate with another Game Boy running the same cartridge. [Andy] demonstrates this with a basic game of Pong being played between two Game Boy Advances.

Working on retro hardware can be great fun — things are well documented, parts are cheap, and there’ll be plenty of fans cheering you on, too. [Andy] has even made the hardware available for purchase on Tindie and his website if you’re not quite comfortable rolling your own.

The Game Boy platform remains ripe for hacking – you can even take screenshots with a logic analyzer these days. Video after the break.

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Game Boy Camera – Now In Color

December 22, 2018 by Lewin Day 15 Comments

The Game Boy Camera is a legendary piece of 90s gaming hardware, despite not being a game at all. It consisted of a low-resolution greyscale camera, fitted to a Game Boy cartridge, that you could use to photograph your friends, vandalise their pictures, then print them out on a thermal printer. It’s hardware that was fun because of its limitations, not despite them. However, [Matt] wondered if there was a way to use early photographic techniques to get color photos.

The technique is simple – get red, green, and blue filters, and take three photos – one using each filter. Then, combine the photos digitally to create the color image. This necessitates an amusingly complex process to transfer the photos from Game Boy to PC, of course.

There are some limitations – due to the speed of the Game Boy Camera, it works best with static scenes, as it takes several seconds to shoot. Also, due to the low resolution, it’s best to choose subjects with broad swathes of color. Despite this, [Matt] managed to take some great images with a colorful yet vintage digital charm. There’s other ways to achieve this, of course – like bringing the power of neural networks to bear on your low-res Game Boy images. Video after the break.

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An Englishman And 48 Gameboys Walk Into A Bar…

November 29, 2018 by Lewin Day 23 Comments

The original Nintendo Gameboy is perhaps one of the most revered platforms for the music known as chiptune. Primarily, artists will use the console with software like LSDJ or Nanoloop to produce their compositions. Some artists will even use two consoles when performing live. However, that’s all fairly quaint as far as [LOOK MUM NO COMPUTER] is concerned.

Back in 2016, a rig was constructed with three Gameboys. With each console having 3 oscillators and a noise channel, this gave plenty of scope. There was even a facility to detune the oscillators for a fatter sound.

Yet there remains a universal human philosophy – more is always better. In this vein, the plan is to create a monster machine consisting of 48 Gameboy consoles. This offers a somewhat maddening 144 oscillators and 48 noise channels to play with. The plan is to produce a massive synthesizer capable of producing incredibly thick, dense tones with up to six note polyphony.

The hardware side of things is at once simple and ingenious. Buttons on the consoles are connected together for remote control using ribbon cables and transistors. System clocks for the consoles are provided by a LTC1799 oscillator chip, which allows the clock to be modulated for audio effects. Initial tests with up to six Gameboys running from a single clock source have been remarkably successful.

Any mad scientist could see the genius involved in this project, and we can’t wait to see the full rig in operation. If you’re just getting started with Gameboy music, check out this primer on modding your Gameboy for hi-fi sound. Video after the break.

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Unique Flat-Screen Display Put To Use In CRT Game Boy

November 13, 2018 by Dan Maloney 30 Comments

The cathode-ray tube ruled the display world from the earliest days of TV until only comparatively recently, when flat-screen technology began to take over. CRTs just kept getting bigger over that time until they reached a limit beyond which the tubes got just too bulky to be practical.

But there was action at the low end of the CRT market, too. Tiny CRTs popped up in all sorts of products, from camcorders to the famous Sony Watchman. One nifty CRT from this group, a flat(tish) tube from a video intercom system, ended up in [bitluni]’s lab, where he’s in the process of turning it into a retro Game Boy clone with a CRT display. The display, which once showed the video from a door-mounted camera, was a gift from a viewer. Date codes on the display show it’s a surprisingly recent device; were monochrome TFT displays that hard to come by in 2007? Regardless, it’s a neat design, with the electron gun shooting upward toward a curved phosphor screen. With a little Google-assisted reverse engineering, [Bitluni] was able to track done the video connections needed to use his retro game console, which uses an ESP32 that outputs composite video. He harvested the intercom speaker for game audio, added a temporary Nintendo gamepad, and soon he was playing Tetris in glorious monochrome on the flat screen.

The video below is only the first in a series where the prototype will be stuffed into one nice tidy package. It certainly still needs some tweaking, but it’s off to a great start. We can’t wait to see the finished product.

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This Ukulele Does Chiptunes, And Not Just Because It’s Made Out Of A Game Boy

October 24, 2018 by Brian Benchoff 15 Comments

When you think about singer-songwriters, the name Bob Dylan might come to your mind. You might think about Jeff Buckley, you might think about Hank Williams, Springsteen, David Bowie, or Prince. You’d be wrong. The greatest singer-songwriter of all time is Tiny Tim, the guy who looks like Weird Al traveled in time and did a cameo in Baker-era Doctor Who. Tiny Tim had the voice of an angel, because Mammon and Belial were angels too, I guess. Tiny Tim is also the inspiration behind the current resurgence of the ukulele, the one thing keeping the stringed instrument industry alive today.

Even though Tiny Tim passed in 1996, he would have loved to see this project that brings the ukulele into the late 20th century. It’s a Game Boy, DMG-01, transformed into a playable musical instrument. It’s a functional uke, but it also has electronics to turn this into a chiptune machine.

The first goal of this project was to build a functional ukulele out of a Game Boy case. This was simple enough — the neck was 3D printed, the bridge was screwed in, and the case of the Game Boy was reinforced with some PCB material. So far, this is nothing new; you can get a model for a 3D printed ukulele on Thingiverse.

The second goal of this project was to make this ukulele into a chiptune machine. This means designing a pickup for the strings, and since these are nylon you’re not going to do a magnetic pickup on a ukulele. The first solution was an IR reflectance sensor, which worked but had too high of a power draw. The better solution was a standard flex pressure sensor, which worked well enough. This signal is distorted into a square wave that gives a surprisingly Game Boy-like sound. You can check out the video demo below.

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Hackaday Links: June 24, 2018

June 24, 2018 by Brian Benchoff 31 Comments

What do you do if you’re laying out a PCB, and you need to jump over a trace, but don’t want to use a via? The usual trick is using a zero Ohm resistor to make a bridge over a PCB trace. Zero Ohm resistors — otherwise known as ‘wire’ — are a handy tool for PCB designers who have backed themselves into a corner and don’t mind putting another reel on the pick and place machine. Here’s a new product from Keystone that is basically wire on a tape and reel. It’s designed to jump traces on a PCB where SMD zero ohm resistors and through-hole jumpers aren’t possible. I suppose you could also use it as a test point. They’re designed for high current applications, but before we get to that, let’s consider how much power is dissipated into a zero ohm resistor.

By the way, as of this writing, Mouser is showing 1,595 for Keystone’s 5100TR PCB jumpers in stock. They come on a reel of 1,000, and a full reel will cost you $280. This is significantly more expensive than any SMD zero ohm resistor, and it means someone bought four hundred of them. The electronic components industry is weird and you will never understand it.

There’s a new product from ODROID, and you want it. The ODROID-GO is a Game Boy and Sega Master System emulator running on an ESP-32, has a fantastic injection molded case, and looks phenomenal. You can buy it now for $32. Does this sound familiar? Yes, a few months ago, the PocketSprite was released. The PocketSprite is the tiniest Game Boy ever, and a project [Sprite_TM] introduced to the world at the 2016 Hackaday Superconference.

This week, the speaker schedules for two awesome cons were announced. The first is HOPE, at the Hotel Penn on July 20th. Highlights of this year? [Mitch Altman] is talking about DSP, [Chelsea Manning] will be on stage, someone is talking about HAARP (have fun with the conspiracy theorists), and someone is presenting an argument that [Snowden] is an ideological turd. The speaker schedule for DEF CON was also announced. The main takeaway: god bless the CFP board for reigning in all the blockchain talks, the Nintendo Switch was broken wide open this year, but there’s only a talk on the 3DS, and there’s more than enough talks on election hacking, even though that was a success of propaganda instead of balaclava-wearing hackers.

The C.H.I.P. is no more, or at least that’s the rumor we’re running with until we get some official confirmation. When it was introduced, the C.H.I.P. was a Linux system on a chip with complete register documentation. It appears the end of C.H.I.P. is upon us, but have no fear: there’s a community building the PocketC.H.I.P., or the C.H.I.PBeagle. It’s a single board computer based around the OSD3358 from Octavo, the same system found in the PocketBeagle. Source in KiCAD, and people are working on it. Thanks [smerrett79] for the tip.

This Thermal Printer Has Serious Game

April 18, 2018 by Brian McEvoy 11 Comments

[Dhole], like the fox, isn’t the first to connect his computer to a Game Boy printer but he has done a remarkable job of documenting the process so well that anyone can follow. The operation is described well enough that it isn’t necessary to scrutinize his code, so don’t be put off if C and Rust are not your first choices. The whole thing is written like a story in three chapters.

The first chapter is about hacking a link cable between two Game Boys. First, he explains the necessity and process of setting the speed of his microcontroller, a NUCLEO-F411RE development board by STMicroelectronics. Once the rate is set, he builds a sniffer by observing the traffic on the cable and listens in on two Game Boys playing Tetris in competition mode. We can’t help but think that some 8-bit cheating would be possible if Tetris thought your opponent instantly had a screen overflowing with tetrominoes. Spying on a couple of Game Boys meant that no undue stress was put on the printer.

Chapter two built on the first chapter by using the protocol to understand how the printer expects to be spoken to. There is plenty of documentation about this already, and it is thoughtfully referenced. It becomes possible to convince a Game Boy that the connected microcontroller is a printer so it will oblige by sending an image. Since there isn’t a reason to wait for printing hardware, the transfer is nearly instantaneous. In the image above, you can see a picture of [Dhole] taken by a Game Boy camera.

The final chapter, now that all the protocols are understood, is also the climax where the computer and microcontroller convince the printer they are a Game Boy that wants to print an image. In the finale, we get another lesson about measuring controller frequency without an oscilloscope. If you are looking for the hack, there it is. There is a handful of success in the form of old receipts with superimposed grayscale images since virgin thermal printer paper by Nintendo costs as much as a used printer.

This story had a happy ending but grab your reading glasses for the smallest Game Boy and here’s someone who wrote their own Game Boy color game.