This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Monday, May 30, 2016

Four Step Atari Punk Console

I thought I'd mix things up a little this week and post some synth circuits people might be interested in. To start things out, here's a modified version of the classic Atari Punk Console. This has a few additional potentiometers for more control and a more versatile version of this popular synth.


In the layout below note that VR stands for variable resistor as the schematic I laid this out from didn't have names for each control (there are 6, labeled A through F).



Pardon all the jumpers, 555s are uncooperative for single sided layouts. Haha
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35 comments:

  1. nachopunkrock91June 13, 2016 at 7:25 AM

    where is the led for the steps

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    Replies
    1. GermánicoDecember 11, 2016 at 6:04 PM

      Substitute the 4004s for leds.

      Delete
    2. SubRosa55July 27, 2017 at 4:46 PM

      Very cool projects!
      i don t understand good the connection for the beat led
      you can explain me better?
      thank you for share!

      Delete
  2. intersticioJuly 15, 2016 at 6:59 AM

    Hi! Do you happen to have any layouts for the wirings? x) Thanks!

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    Replies
    1. UnknownAugust 15, 2016 at 4:53 PM

      Its pretty straight forward. Each VR is a pot. VR_A 1 would be pin one on pot VR_A. I don't think there is a pretty way to do this layout with all the off board controls. Just jump in head first and wire it up. I look forward to seeing your build.

      Delete
    2. intersticioSeptember 17, 2016 at 6:21 PM

      Hi, thank you for your answer.. I've tried it and it works... but not all of the potentiometers seem to be working.
      On your layout, the VR_A for example, where it says: VR_A 2/3. is it pint 2 connected to pin 3 and both to the correspondent input / little hole?

      I appreciate your response. Thank you!

      Delete
    3. Effects LayoutsSeptember 17, 2016 at 6:23 PM

      Yes, jumper lugs 2 and 3 on the pot with a wire, component cut off, whatever you prefer... Then run a wire from that connection to the 2/3 pad.

      Delete
  3. intersticioSeptember 18, 2016 at 1:51 PM

    It works!! It's awesome. I'd loved it. Thanks! You've made my sunday!

    ReplyDelete
  4. UnknownMay 23, 2017 at 8:24 PM

    Hello, is there a schematic for this layout? Thank you!

    ReplyDelete
    Replies
    1. Effects LayoutsMay 24, 2017 at 9:19 AM

      Schematic: http://drebot.uk.to/content/bin/4stepapc.png

      Delete
    2. UnknownAugust 21, 2018 at 10:29 AM

      link is broken 😢

      Delete
    3. UnknownOctober 8, 2019 at 11:56 AM

      YEp i want schematic too. Can someone repair the link?

      Delete
    4. FLBIOFebruary 23, 2023 at 11:08 AM

      Few years later...
      https://web.archive.org/web/20150803053116/http://drebot.uk.to/content/bin/4stepapc.png

      Delete
  5. pakkee66November 4, 2017 at 2:50 AM

    hey, build this and boxed, added cv in, can't stop to mess with..
    thanks for the layout~ share shot clips here:
    https://www.youtube.com/watch?v=e8B7ffXzWuk&feature=youtu.be

    ReplyDelete
    Replies
    1. Effects LayoutsNovember 4, 2017 at 11:58 PM

      Super cool!

      Delete
    2. pakkee66November 5, 2017 at 1:09 PM

      Thanks boss~ one more short clips share: https://www.youtube.com/watch?v=t5WTIq_JIRg&feature=youtu.be ,enjoy~

      Delete
    3. blakolJune 10, 2018 at 12:51 PM

      Hi, where did you add the cv in on the layout?

      Delete
    4. AnonymousDecember 8, 2018 at 5:54 PM

      yeah! it would be great to have cv in :) thanks for the awesome layouts

      Delete
  6. SpookybobOctober 3, 2018 at 11:32 PM

    I got this working, my only complaint is that the frequency pot only seems to have about 25% of usable frequency as I turn it before it becomes a low grumble that has no different sounds from the other pots. Any tips?

    ReplyDelete
    Replies
    1. Effects LayoutsOctober 4, 2018 at 9:11 AM

      You could try using a lower value pot and probably a log/audio taper pot.

      Delete
  7. SergioNovember 29, 2018 at 3:50 PM

    Can I use NE555P?

    ReplyDelete
  8. shvtsvckaDecember 27, 2018 at 10:07 AM

    hey
    what should be the value for the pots?
    thanks

    ReplyDelete
  9. AnonymousJuly 3, 2019 at 9:07 PM

    i´ve made a video on how to wire the potenciometers on this project. It is in spanish though. I hope you like it.
    https://youtu.be/Y0FB5yMeiXM

    ReplyDelete
    Replies
    1. akemiesMarch 8, 2020 at 1:09 PM

      i have also designed a PCB to avoid all the wiring on this project. You can connect both pcb´s with header pins and some jumper wire as shown on the picture attached on link below

      https://github.com/akemies/Four-Step-APC-control-PCB

      Delete
  10. HoomanOctober 12, 2019 at 5:19 AM

    Can i get a schematic on this layout?

    ReplyDelete
  11. DiegoceNovember 12, 2019 at 11:14 PM

    Hi, where can I add a cv in?

    ReplyDelete
  12. DanMarch 23, 2021 at 5:09 AM

    https://web.archive.org/web/20150803053116/http://drebot.uk.to/content/bin/4stepapc.png

    you can find the schematic here

    ReplyDelete
  13. AguiJuly 22, 2021 at 11:34 AM

    Hola, tenia una duda,acabo de terminar el circuito y quero saber el valor de los potenciometros del sequenciador

    ReplyDelete
  14. UnknownAugust 26, 2021 at 12:50 PM

    Porque el pin 8 que es la tierra no está conectado?

    ReplyDelete
  15. SevrienDecember 25, 2021 at 4:44 AM

    Hi,

    A few questions:

    what is the output level? line-instrument-headphone?
    What value for the pots is advised?
    Changing the diodes for LED's is ok?

    thanks
    btw, great circuit.

    ReplyDelete
  16. SevrienDecember 25, 2021 at 5:39 AM

    one last question, if I would make 2 of these and let them run in sync to create a polyphonic sound.
    My guess is to make one of them master and send the timing pulse from 1 APC to the other at pin 14 of the 4017IC.
    Am I correct?

    In order to make it 8 step, I should bridge pin 9 and 15 and double the "tone" citcuits?

    ReplyDelete

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