Atari Punk Sequencer: Wrapped Up (Mostly)

February 28th, 2011 Posted in Atari Punk Sequencer

Since I’ve had this breadboarded and planned for such a long time, getting all the stuff soldered up and mounted into an enclosure was actually super quick.  I was particularly proud of my soldering job, as it was easily the best looking job I’ve ever done.

(Click Images To Enlarge)

I used the same Radio Shack 276-170 board that I have used before, and I actually ended up with a lot more empty space than I thought I was initially going to have (these shots are before I soldered up the external connections to the potentiometers and switches).

For the enclosure I picked up a LMB Heeger Modular Desktop Console for relatively cheap from

Things went together really well, granted I couldn’t get the touch contacts to work (I had planned to use rubber grommets to insulate the touch points, but after many struggles I realized that the stupid grommets were conductive! Either I’ll find some non-conductive grommets, or I’ll patch over the holes I made for the touch points with a name plate for the unit). I haven’t painted the box yet, but when I do, it’s going to be some sort of green, to match the knobs.

I know this was a short build, but trust me, the time spent planning was probably thrice as long as the build time.

Without further ado, here’s a video of the Atari Punk Sequencer in action!

  1. 3 Responses to “Atari Punk Sequencer: Wrapped Up (Mostly)”

  2. By Jacob on Jun 9, 2011

    love this project, anything with audio and Blinky lights !

    If you don’t mind, I have a few questions concerning the schematic,
    . What does the ‘IC3P’ notation represent?
    . Will the ‘AUDIO’ out require amplification or will it be able to run a small speaker as is?
    . And am I right in assuming that CDS1/2 are the touch points you mentioned in the video?

    Thank you for any help you can provide


  3. By Guillem aka Kritter on Jun 22, 2011

    Hi man!!!
    Great stuff at your site,

    My name is Guillem, from Valencia(Spain)>>>

    please, I am trying to do the schematich from your sequencer(so glad cause you share info), with Orcad Capture Cis and I have some doubts.

    What is IC3P?
    and has R6 a pin disconnected? why?

    I am so new at electronics, but enjoy hardcore and breakcore music, and also 8bits, circuit bending……can you help me?

    Well, please contact me, and keep doing like that!!!
    The best is the gaunlet machine, waaaa man, that was awesome!!!

  4. By Aaron on Aug 5, 2011

    IC3P is part of IC3, the 4017 decade counter. For whatever reason, Eagle breaks up the schematic for the chip into power and other connections.

    R6 is a potentiometer, So you connect one line to the center terminal of the pot, and another line to the out on the pot.

    This will require some amplification. I would guess you could get some sound out of a small speaker, but I never tried (I’ve got a small cheapo guitar amp ($20) on my work bench that I use to test audio outs).

    Yes, CDS are touch points/contact pads.

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