Putting Every Chiptune Ever In An FPGA

Finally one device combines the power of the Commodore 64 SID, Atari ST YM2149, and Amiga MOD audio into one awesome box. It’s called the RetroCade Synth, and there’s a Kickstarter that is perfect for starting your chiptune composing journey.

[Jack]’s RetroCade synth is connects directly to the Papilio One 500k FPGA. All the classic chiptune ICs can be emulated in this FPGA including the Commodore 64 SID chip, and an Amiga MOD player. Being a follow-up to [Jack]’s previous FPGA YM2149 project, he also threw that chip into the project for good measure. While the RetroCade doesn’t ship with every old chiptune IC – there isn’t support for NES, Atari, GameBoy, or SN76489-based chiptunes yet – that is something [Jack] will add once the Kickstarter is completed.

After the break you can see [Jack] jamming out on his RetroCade project playing a YM2149, SID, and Amiga MOD sounds simultaneously. For $100, it’s comparable to the venerable MIDIbox SID, but also allows anyone to play whatever genre of chiptunes they desire.

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Retrotechtacular: The Mother Of All Tech Demos

Most bits of a computer we take for granted today – the mouse, hypertext, video conferencing, and word processing – were all invented by one team of researchers at Stanford in the late 60s. When the brains behind the operation, [Douglas Engelbart], showed this to 1000 computer researchers, the demo became known as The Mother of all Demos. Luckily, you can check out this demo in its entirety on YouTube.

Even though [Englebart]’s demo looks incredibly dated today, it was revolutionary at the time. This was the first demonstration of the computer mouse (side note: they call the cursor a ‘bug’), a chorded keyboard, and so many other technologies we take for granted today. During the presentation, [Englebart] was connected to the SDS 940 computer via the on-line system 30 miles away from Stanford. Yes, this pre-ARPANET, what is normally cited as the precursor to the Internet.

Sadly, most of [Englebart]’s researchers became disillusioned with the time sharing /mainframe paradigm shown in this demo. Those researchers wanted a more decentralized means of computing, so they went off to Xerox PARC where they helped create the first personal computers. Still, most of the ideas from 1968, such as the mouse, hypertext, and word processing, were in those little Xerox boxes.

On a more philosophical note, [Englebart] began his demo with the question, “If, in your office, you as an intellectual worker were supplied with a computer display, backed up by a computer that was alive for you all day and was instantly responsive to every action you had, how much value could you derive from that?” In the 44 years since this Mother of all Demos, we’ve gotten to the point where we already have a computer on our desks all day that is able to do any task imaginable, and it certainty improved our quality of life.

There are a few great resources covering the Mother of all Demos, including the Douglas Engelbart Institute’s history page and the Stanford Mousesite. Looking back, it’s not only amazing how far we’ve come, but also how little has actually changed.

The Dronitar; A Scrap Made Motorized Sitar

This peculiar instrument, called the Dronitar,  is completely made from scrap. Interestingly, it sounds pretty good. You can hear the dronitar in action in the video after the break.The call this a  “2 stringed” instrument,and most who are instrumentally savvy will find a bit of confusion here. They are referring to the string that you play as well as a small string that is struck against the other by a motor to create the droning effect. The result sounds very much like a sitar mixed with a bit of surfer rock styling.  You’ll note that they’re even using a second motor as the pickup!

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Dot Matrix Printer Spits Out Any Tweet Mentioning @KWF

Earlier this month, [Kenneth] picked up an old dot matrix printer at the Silicon Valley Flea Market and subsequently found two cases of tractor feed printer paper. It’s a marriage made in heaven for a dot matrix twitter printer.

[Kenneth] used a BeagleBone – a tiny single board computer running Linux – to connect to the Internet and fetch any new tweets mentioning KWF every minute or so. The BeagleBone spits out these tweets over the USB port which is connected to the ancient printer by means of a cheap adapter cable.

Interestingly, [Kenneth] wrote the code for this project as a shell script. A lot of effort went into scrubbing the input of any escape characters, but he still implores his admirers to not attempt to break his project.

In case you’re wondering, at couple Twitter accounts announced this post’s headline to the Twitterverse when this story was published. This should have immediately sent [Kenneth]’s printer into motion, recording that harsh mistress that is sending a build log of a Twitter connected device into Hackaday.

After the break you can see [Kenneth]’s demo. Be sure to share this post on Twitter!

Fine Tune Your Morse Code Skills With This Mint Tin Practice Keyer

mint-tin-keyer

Hackaday reader [svofski] wrote in to share a device he built, which would be useful to any ham operators out there trying to hone their CW skills. He calls his practice keyer the Morseshnik, and it is a combination of various items [svofski] found while digging through his parts drawer.

He disassembled an old hard drive, saving its read arm to serve as the keyer’s paddle. He purchased some small angle brackets to create a set of contacts for the device, between which the lever sits, automatically centered by a pair of springs.

An MSP430, which was also collecting dust in [svofski’s] junk pile, resides inside the Morseshnik’s mint tin base on a small DIY PCB. It allows him to toggle between manual and automatic keying modes with the flick of a switch as he whiles his time away practicing his dits and dahs.

Continue reading to see a short video of the Morseshnik in action, and swing by his site for code and PCB schematics should you want to build one of your own.

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Making Instagram With An Old CRT

If you’re not familiar with Instagram, it’s a mobile app that takes pictures, applies low-fi ‘lomographic’ digital filters, and shares them on the Internet. For reasons we can’t comprehend, Instagram has been wildly successful as of late and was recently purchased by Facebook for a Billion dollars. [Martin Ström] figured he could do something much cooler than applying digital filters to a cell phone picture, so he built InstaCRT, an app that turns your pictures into grainy CRT images and satiates the geek and hipster in everyone.

From [Martin]’s project page, InstaCRT uses a small black and white CRT from an old camcorder and a Canon 7D to apply real-world analog filters to all the uploaded pictures. Once the pictures are uploaded to the MacBook Pro server, they’re displayed on the CRT and a picture is taken with the 7D. Once an Android/iOS device sends a picture to the server, it’s displayed on the CRT, the 7D snaps a picture, and the resulting ‘filtered’ picture is sent back to the mobile device.

While we’re sure a few Hackaday commentors are going to ask ‘why’, it’s still a very cool build that is the first real world digital camera filter we’ve seen. You can check out the video demo of InstaCRT after the break.

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Cemetech’s Ultimate Calculator V2

[Christopher] piped up in our comments on a recent post about using laptop touch pads in other things, noting that he had done this on his Ultimate Calculator Version 2. What he’s done is upgraded his TI-83+ calculator to house a number of improvements and customizations. It now has a stronger RGB backlight so he can illuminate his screen in whatever color strikes his mood. He also integrated a PS2 port so he could use an external mouse/ keyboard. What brought this to our comments though, was the embedded laptop touchpad on the back that is also fully functional. He topped it all off with a rather pleasing paint job as well.

The funny thing is, we caught a glimpse of this thing in a previous post about networking these calculators.