APC, Atari, Punk, Console, Atari_Punk, Atari_Punk_Console, DIY, Electronic_circuits, Synthrotek, Lo-Fi


Originally designed by DIY electronics guru Forrest Mims III as the “Stepped Tone Generator”, the Atari Punk Console is one of the most famous and recognizable Lo-Fi synth circuits ever. Using a single 556 dual timer IC with minimal part count, the Atari Punk Console circuit is a solid, time-tested noise generator capable of outrageous square wave madness!

  • Low part count = easy build for beginners!
  • Dual power supplies: use a 9V battery or save money on batteries with an AC Adapter rated at 5-12V 200mA Center Negative polarity. DC Jack allows for power switching so that battery power is only enabled when there is no AC Adapter plugged in.
  • Control Voltage (CV) input allows step sequencers and waveform generators to expand the sonic capabilities of the Atari Punk Console from drone to arpeggio-like dynamism. Use any variable voltage source from 0-Supply Voltage for some glitchy goodness!
  • 3 potentiometer controls – Pulse Width and Frequency contour the tone.
  • The Atari Punk Console PCB is designed here at Synthrotek and manufactured to high-quality specs by our friends at Imagineering here in the USA! Silkscreen layer helps you place components onto the Atari Punk Console PCB with minimal effort.

Check out our Youtube channel for more videos


  1. Nick says:

    Do you have the pedal version of this? The one wth the 2 CV jacks on it?

  2. Steve Harmon says:

    Hey Nick,
    This blog page has older media on it and our Atari Punk Consoles of today have two CV inputs standard. I’ve included the store links for the pre-built pedal and the kit, which does not come with an enclosure.
    Hope that helps!

  3. Jerry says:

    Hello, do your APC kits come with that Bass mod from your YouTube video ?

  4. Steve Harmon says:

    Hey Jerry,
    The kits do not come with the bass mod, and the current APC revision has not been tested with that mod. The schematic is available, and thankfully many folks have compiled plenty of mods which you could experiment with.

  5. Ben says:

    When I plug a keyboard with CV out into either cv input, the notes play as if inverted, so low notes on the keyboard play higher through the apc. What am I missing?

  6. Synthrotek says:

    Hi Ben, that is normal for the APC. The original version has inverted CV.

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