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So, What is an Atari Punk Console?

Atari Punk Console v.1 from Christopher Hoang on Vimeo.

The Atari Punk Console is one of the most popular do-it-yourself synthesizers. The orginal circuit designed by DIY electronics guru, Forrest M. Mims III ( forrestmims.org ), back in 1980 and published in a book called the Engineer's Mini Notebook. Which I also found in the U.C.S.B. Davidson library.

Years later, the group 'Kaustic Machines' republished the design with a Line Output rather than orginally designed with an 8 Ohm speaker, and named it the Atari Punk Console.

I recreated this version of APC with the same schematic design with the following build of materials.

The APC works by having the two timers within the circuit in conjunction with one another. One timer is configured as a square wave audio oscillator and its output is divided by the second timer, which gives a step-like sound.