Baby 8 step sequencer schematic

now maybe you can check it :wink:

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Check it! I’ll just build it and trust in @Dud!
Seriously though, well done. A new high standard Baby8. Bravo

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:slight_smile:

in action i think it’s a good way with the on/off/on switch

in contrary with a rotary switch
with the reset switch on each step, you can change the value of sequence during playing (without pass by all the step between )

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I’m pretty sure that using button mechanical arrays used to be a common solution; press one button and before contact is made any other button pops out.

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i also re do the schem

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I spy with my little eye, something beginning with… M!

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OOOoooouuuuhhhh :crazy_face: yes thanks a lot !!!
i edited and re uploaded my schem in the precedent post

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Nice work! Glad to hear it worked!

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In his latest video @moritzklein shows a slightly simpler trick for solving the issue with the gate being on all the time:

The individual steps are connected together via diodes as in your schematic, but then squeezed through a resistor where the other end is also connected back to the clock in via a diode! So every time the clock goes low, the gate out is also pulled low! Just check his video, he explains it much better!

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My gate out problem is solved, but thank you, i’ll go look at this :slight_smile:

btw with your description it seems to be like in my schem with a diodes AND Gate between the clock and the step

EDIT : not exactely the same thing, not a real AND gate, but near :slight_smile:

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I’m preparing a video on the sequencer and it looks like I haven’t tested everything :roll_eyes:

a mini reset problem (yes again :slight_smile: )

  • the “auto” reset (step 9) work
  • Reset switch for each step work
  • Momentary manual switch works … except when it is another step than the 9 selected

I was still missing a diode, and it was on my schem but not on my stripboard !!!

i deleted my “verified stripboard”, test it soon and re post it after a true complet test :slight_smile:

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EDIT : add the famous diode and all work well know :slight_smile:

Panel preparation (note that there had to be also a Trigger output, which following the Gate problems, it is transformed into 2nd Gate output (but the panel has not changed :roll_eyes:)

some spaghetti

a short demo

a test with other modules :slight_smile:

and a verified stripboard here

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I’m building a baby 8 off 12V supply and came here to see if there was an answer to my issue. Everything works just fine except I would like to reduce the range of the CV output to only a few octaves. I tried this:

as well as numerous other things while prototyping but can’t get anything working how I want. In your layout/schematic, @Dud, is there a specific part that deals with this since I’m having difficulty finding it? Thanks :slight_smile:

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Sorry no part to adjust the CV outon mine, but your idea to add an offset pot can maybe help you (but i’m not an expert :slight_smile: )

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No worries! Out of curiosity, when plugged into the pitch of a VCO, does your output span from clicking to somewhere around 7 octaves (not too sure about the exact voltage at this moment)?

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I remember that it goes quite high, but how many octaves I don’t know ?

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All you need is a gain stage. Above circuit should work I think, but can’t help you without knowing more about what you did and what happened.

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I managed to experiment and come up with an alternative design that allows for changing control voltage range with trim pots (I set my range for my VCO to be between C2-C5). Not sure if the design is the most efficient, but it works! Module also includes a rotary switch for step reset, internal clock, and the ability to toggle gate on/off per step. I was able to pack it into 5cm though I probably need to opt for some knobs smaller than 16mm since it’s a bit tricky :grin:

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Cool !
personally difficult to do without the manual step for tuning, and especially the manual reset to facilitate synchronization with other stuff, but nice job :slight_smile:

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Yep! Those were the two things that had to go, unfortunately, to pack it in so small, but it hasn’t been too much of an inconvenience for me this far

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