“The Atari Punk Console (commonly shortened to APC) is a popular circuit that utilizes two 555 timer ICs or a single 556 dual timer IC. The original circuit, called a “Stepped Tone Generator”, was published in a Radio Shack booklet: “Engineer’s Notebook: Integrated Circuit Applications” in 1980 and then in “Engineer’s Mini-Notebook – 555 Circuits” by its designer, Forrest M. Mims III (Siliconcepts, 1984). It was named “Atari Punk Console” (APC) by Kaustic Machines crew because its “low-fi” sounds resemble classic Atari console games from the 1980s, with a square wave output similar to the Atari 2600.”
– from http://en.wikipedia.org/wiki/Atari_Punk_Console
How to Build: http://www.instructables.com/tag/type-id/?sort=none&q=atari+punk+console
If you are interested in analog synthesizers and have money to spend, check out http://littlebits.cc/kits/synth-kit
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