Friday Hack Chat: Logic Noise

If you like your synthesizers glitchy, squawky, or simply quick-and-dirty, you won’t want to miss this week’s Hack Chat with Hackaday’s own [Elliot Williams], because he’ll be brain-dumping everything he knows about making music with 4000-series CMOS logic chips. Break out your breadboards!

Coaxing sound out of chips intended for digital mathematical operations might sound odd, but there’s a tradition of doing so that dates back to the late 1970s. While the scene is dominated by hackers and artists, would you believe that there was even a commercial synthesizer (the EDP Wasp) based on these techniques?

Even more surprisingly, people …read more

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An 8-Bit ALU, Entirely From NAND Gates

One of the things that every student of digital electronics learns, is that every single logic function can be made from a combination of NAND gates. But nobody is foolhardy enough to give it a try, after all that would require a truly huge number of gates!

Someone evidently forgot to tell [Notbookies], for he has made a complete 8-bit ALU using only 4011B quad NAND gates on a set of breadboards, and in doing so has created a minor masterpiece with his wiring. It’s inspired by a series of videos from [Ben Eater] describing the construction of a computer …read more

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