Ah yes, the 555 piano project. Be it the Atari Punk Console, or some other 555 based synthesizer, Hackers just love to hear what the 555 can do when attached to a few passives and a speaker. It’s a sound to behold. But for [Berna], that wasn’t quite enough! Below the break, you can see his creation, called the Acordeonador.
A portmanteau of the Spanish words for “Accordion” and Generator”, the Acordeonador does what no project we’ve seen so far can do: It turns a CD drive into a generator for a 555 based synthesizer.
To give the Acordeonador a more analog feeling, a large 4700uf electrolytic capacitor stores just enough energy to make the music generation more than an on/off affair. It’s a great effect, and it works well! Not being one to leave any details out, [Berna] prototyped the build on perf board and then covered the board in what appears to be an wood grained contact paper, giving it that 1970’s dual keyboard electric organ feel.
It might seem almost comical to our more fresh-faced readers, but there was a time when you could go into a big box retailer and purchase what was known as a “DivX Player”. Though they had the outward appearance of a normal DVD player, these gadgets could read various digital video file formats off of a CD-R or DVD-R, complete with rudimentary file browser. Depending on how much video compression you could stomach, a player like this would allow you to pack an entire season of a show or multiple movies onto a single disc. Before we started streaming everything online, that was kind of a big deal.
[Roberto Piva] got his hands on one of these early digital media players, a KiSS DP-500 circa 2003, and decided that it was too unique to send off to the recycling center. Not only was he curious about what made it tick, but he thought it would be interesting to try converting it into a Raspberry Pi powered streaming media player. One might say there’s something almost perverse about taking the carcass of one of these devices and stuffing it full of the same technology that made it obsolete in the first place, but who are we to judge?
Upon opening the vintage set top box, [Roberto] was immediately struck by how empty the thing was. He got the impression the device was a rush job, pushed out to capitalize on a relatively short-lived trend. Looking at it, we have to agree. It’s almost as though they got a deal on some old VCR chassis laying around in a warehouse someplace and decided to stick some (at the time) modern electronics in it. It even uses what appears to be a standard IDE optical drive rather than something purpose built.
[Roberto] hoped that he could tap into the player’s original power supply, but upon testing found that it wasn’t quite up to the task to reliably running a modern Pi. So into the cavernous enclosure went a powered USB hub, which he wired up to the original power switch on the player’s front panel. The original PSU couldn’t handle the Pi, but it does work nicely to spin up an IDE hard drive that he mounted to the top of the optical drive with zip ties.
This was enough to get a nice Kodi set top box that’s capable of pulling media from the Internet or the internal HDD, but [Roberto] has more plans for the future. He wants to try and get the optical drive working through a USB-to-IDE adapter so the device can come full circle and once again play burned discs full of video files, and mentions he would like to reverse engineer the front panel and IR receiver to control Kodi.