[Dane] built this excellent home theater pre-amplifier. He used [Mark Hennesy]’s pre-amp design to start with, and added selectable XLR, RCA, SPDIF and even USB audio inputs. Discrete inputs from his DVD player provide surround input, and an analog matrix creates 7.1 surround from the 5.1 input. The design is very elegant, and even uses a VFD display that appears blue with some filters. I usually just buy my HT gear, but projects like this make me seriously consider re-building my entire HT from scratch.
home entertainment hacks780 Articles
DDR Pacman (AKA DDR Pad Rewiring)
[Jason] sent in his low-tech, but interesting hack to allow the use of a DDR pad with his Gameboy advance to play PacMan. He took a $15 DDR pad, gutted it and wired directly to each of the foil pads that he wanted to use as buttons. For his project, he simply wired each pad directly to the DPad buttons on his Gameboy. It’s really a pre-manufactured version of [fbz] zone switches that she built for her backpack strap wifi detector.
By the way, [matt] over at Instructables wanted me to let you guys know that they’re giving away a $15k Versalaser.
Super8 Automatic Film Scanner
[edocronian] sent in this interesting mindstorm hack. [Harri] had several Super8 reels that he shot during the 80s. His kids put together this mindstorm NXT transport mechanism, and he did the rest with linux. The lego’s pull the reel across an Epson scanner, and some linux hacks run the scanner, identify the frames, and reconstruct the film. Unfortunately, [Harri] didn’t release any of the software hacks he used to pull it off.
Day O’ Guitar Hero Mods (with A Bonus)
I’ve already gotten a pile of tips on Guitar Hero controllers today, so here we go. The first one is already making the rounds. [Mark] replaced strummer with a touchscreen LCD and a magnetic switch. [Mark]s ultimate goal is to add some optical sensing and make the guitar self playing. For details, hit the acidmods thread or just watch the proof of concept demo.
[Johan] sent in the second controller of the day, and it’s probably my favorite for guitar bling. The original mushy switches were replaced with micro-switches and CNC milled replacement buttons. Each button is individually lit with LEDs and a cold cathode lights up translucent panel in the body. A PIC controller controls the lights and provides some input options for button tapping. The video is actually pretty entertaining to watch.
For a little bonus, check out [Mastershake916]’s cast Hack-A-Day pendant.
NES Inside A Controller With Cartridge Compatibility
[Tony] sent in this Nintendo hack. It’s a fully functioning NES with Composite output inside an old school controller. On the back it’s got a cartridge connector, so you can play normal games, there’s a port for a second player/light gun, and for extra bling, the Nintendo logo is backlit. To pull it off, he stuffed a Super Joy III – A.K.A. famiclone inside the controller, did a marathon of soldering for the cartridge connector, and used the now unused controller wires to carry the video and second controller signals.
Yes, this has been around for a while, but I dig it.
Rio Receiver SLIMP3 Emulator
[Roo] sent this in, and it took me a few minutes to see what’s so interested about a deprecated digital audio player. The Rio Receiver originally sold for about $350. Today it’s a dead product, but thanks to some software mods, it can be hacked to acquire the abilities of the SLIMP3(A.K.A. Squeezebox) player. So score one of these puppies on ebay and thanks to a combination of a modified kernel for the player and some software on a linux box, you you turn that old Rio Receiver into a SLIMP3 emulator.
Automatic Projector Calibration
[Johny Lee] sent in his(pdf) awesome projector calibration project. By adding embedding some optical fiber that feed into a set of USB connected light sensors, his groups software can determine the exact pixel position of each sensor. Once the positions are determined, the projected image can be dynamically adjusted to fix the screen. The technique can be used to stitch together multiple projectors, and even calibrate an image to project onto a three dimensional model. I know some home theater nuts that would love to have this system for calibrating their CRT projectors.
This is such an excellent project, that I want to give credit where it’s due – it was developed by [Johnny C. Lee], [Paul H. Dietz], [Dan Maynes-Aminzade], [Ramesh Raskar] and [Scott E. Hudson].
Be sure to check out the video demo after the break!
