Tome GS And Tome MP

August 13, 2009 by Caleb Kraft 10 Comments

[youtube=http://www.youtube.com/watch?v=a0e6oujZOwY&feature=player_embedded]

[Dennis] tipped us off to his Tome project. It looks like two projects using very similar hardware. The first is the Tome GS; a tiny game system that looks like it could hang from a keychain. This is apparently the second revision of this system, based off of some of his comments. He’s done a pretty good job, it looks solid and functional. It even includes a zigbee wireless module for communication with others. He states that the graphics should be roughly the same as a gameboy advance. The second is the Tome MP, a portable media player roughly the same size as a first gen iPod nano. It is equipped with bluetooth, though he’ll be removing that in the next iteration in favor of a zigbee. We would really love to see more information on the design behind these projects.

AVGA: The AVR Based Video Game Platform

August 12, 2009 by Nick Caiello 16 Comments

avrvideogame

We’ve seen our fair share of AVR projects, but this one’s pretty cool. AVGA is a color video game development platform based on the Atmel AVR family of microcontrollers. As seen in the picture above, one of the AVRs that the project uses is the popular ATMega168. There were several technical hurdles to using the AVRs to run color video games; one of the most difficult problems was figuring out a way to display detailed graphics from AVRs limited onboard RAM. Eventually, the developers figured out a way to display detailed graphics using a TILE-based driver. The TILE driver works by dividing the screen into X and Y coordinates, dividing the graphics into tiles. Then, when a graphic is needed it’s addressed from a reference table that’s stored in the AVR’s onboard RAM, allowing the bitmap graphic to be loaded from a game’s ROM. Currently, the only games available for the platform are a Super Mario clone, a Pacman clone, and a Snake clone. While there are only a few games available, the platform definitely looks promising. If anything, this project serves as a great example for what off the shelf microcontrollers are capable of.

Dry Ice Cannon

August 11, 2009 by Caleb Kraft 19 Comments

[vimeo= http://vimeo.com/6034556%5D

[Alexander] sent in his entry into a “creativity contest” at his university. He and some friends put together this dry ice cannon. Take note of the creative mechanism they used to mix the water with the dry ice. A large amount of gas is expelled as soon as the two begin to meet. If the gas is supposed to escape through the same opening, it is difficult to get all the material through. They have added a second opening just for the exhaust during mixing. Great job guys. How about some downloadable plans.

DOSbox On Zipit

August 10, 2009 by Caleb Kraft 19 Comments

poolrad (Custom)

Who out there has a Zipit? Great, now out of the five of you, who really wants to run Dos on it? Well, for the one or two of you left reading, now you can. The directions can be found here. [Hunter] has worked out a way to get DosBox running on his Zipit. At 315 mhz his old DOS games, like AD&D shown above, are running quite snappily. You can download everything you need to get up and running from the site. If DOS isn’t your thing, you may want to check out the Linux how to as well.

[thanks Harold]

Neo Geo Mini Arcade

August 9, 2009 by Eliot 20 Comments

neopocket

[Pocket Lucho], the builder of mini arcade cabinets, is back with another build. This time it’s a miniature Neo Geo arcade machine (translated). The build is very compact and neat. He attached the control panel and the PS one display using magnets to make the wiring more accessible. It has video out and second player input too. You’ll find an assembly video embedded below along with a trial run. Continue reading “Neo Geo Mini Arcade” →

Serial Hacking With An ATtiny2313

August 6, 2009 by Steve Watkins 19 Comments

board

[Sprite_tm] automated a portion of serial hacking by sniffing out the baud rate using an ATtiny2313 and FT232 breakout board. The firmware assumes 8 data bits, no parity, and 1 stop bit (8N1). This is pretty much defacto among serial ports so it should work well, though some devices do use different settings. The auto detection routine can sniff rates as low as 110 baud and supports non standard rates. Released under GPLv3, the software is also supplied in hex format. [Sprite_tm] has provided great project in past such as Working with VFDs, Controllable bristlebot, and AVR boost converter. Additional information regarding serial hacking after the break.

Continue reading “Serial Hacking With An ATtiny2313” →

BPSK On 433 MHz European ISM Band

August 3, 2009 by Steve Watkins 10 Comments

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[WaveRider] is using a type of phase shift keying called BPSK to transmit digital sound and video for remote telemetry. Though a higher signal to noise ratio (SNR) is generally sought after with communications, legal limitations are imposed on total radiated power. To balance the two headed beast, he opted out on frequency shift keying due to binary shift keying’s ability to work with lower SNR. This adds the difficulty of properly reconstructing the digital signal at the receiver. A PLL based carrier regeneration circuit is used to reconstruct the signal. Using the Rabit2000 processor as the host controller on both transmitter and receiver, 96KB/Sec serial data is obtained. On the other side of the spectrum is the Homemade regenerative tube radio.