great work looks fantastic and a beast of module too
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I updated the repo, mainly to correct errors in the schematic. Some backwards pots, time reverse switch pin reversal. And to fix up input protection diodes/resistors. The latter revision is unverified, but “certainly” correct.
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Hi, first post (and a dumb one), what is the unit next the sequencer in WilliamOsbournes post (June 4th one)?
Many thanks
Ignore that post. Figured it out
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Gosh its been a while, got everything set up, appart from the 555 daughterboard, and i am rethinking that because of how spaghetti junction everything is. Im thinking I’ll just make a dedicated 555 timer module instead and then i can plug that into other things. But yeah, here is a pic of the big drum and 8 step combo done. Behold my horrible wire management!
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Lord, no, don’t turn it on. That’s when it all goes to hell.
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I mean it should work, I’ve double checked to make sure there arent any bridges etc etc, but its at the point where Ive spent so much time on it that its scarry to turn on. I know for a fact the two VCOs work as well, already tested those.
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Put it outside, a safe distance from the house, use a long extension cord, hide behind a wall, bite your tongue and GO !!! plug it in !
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wow nice setup and very cool use of all the modules, love the sequencer layout, greart job
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@eric I think im gonna double check one more time sometime tonight with the disecting scope then just go for it.
@SYNTHGUY57 Thanks! Honestly I’m surprised how well it all worked out! I’m thinking of taking some old computer fans and mounting them in the back to help with cooling.
I’ll make it its own thread if I do, we’re kinda drifting away from specufically the sequencer at that point.
sounds great yes fans and details to running the power rails to them always helpful hints, though I ran fans to my amps in my spl set up for competitions and those were marvy
Do you have a power amp in that setup?
Otherwise it’s all pretty low power circuits, you shouldn’t need a fan.
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Really? Oh well thats good for me. I honestly know nothing about electronics so I’m not entirely sure how much power is getting used etc. I just have the ectra fans i could mount in there so I was just gonna do it.
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Modules vary but a fairly typical number might be 20 milliamps on each of the two power rails (+ and - 12 volts). Then the power consumption would be 2 x 0.020 x 12 = 0.5 watts per module. You’d need quite a few such modules (or not so many unusually high power draw modules) before they’d need a fan.
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fans will probably make more noise [ line , audible ] than they are worth in that situation .
the heat sinks on the power supplies are about the only thing putting off any real heat and that should be pretty minimal to , if they are really hot you are pushing them to hard .
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So by that back of the napkin math im pulling about 5 watts total on this thing. Huh, less than most light bulbs. Neat!
I really should spend some time to learn some basics to better understand electronics. My problem is whenever I try my brain just wants to dribble out of my ears.
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Sorry for the late reply!
It’s a transparent letter size sticker, i don’t have any other way of printing on metal
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question - I am new to this and ended up building this and a bunch of super simple oscillators. After lots of fun building and taking my time it seems the sequencer is working but something seems not right or is it just I don’t get how it should work? Are there any instructions somewhere indicating what each switch, knob and jack does (given base setup)?
I ask as while i am able to get it to sequence manually using the forward/backward switch (I think) or to specific steps by mashing on different buttons - I nonetheless am not getting any sound out of it … I thought putting a super simple oscillator into it (forward / reverse? they are the only ones not labeled “out”) then I should get output in one of the output jacks? or? or is this maybe a result of some miss wiring/schematic (eg as I just learned the pulldown resistors on the forward reverse should be after the diodes)?
thanks for your help!!
The sequencer is meant to produce control voltages that vary over time that you e.g. plug into an oscillator’s V/Oct input (voltage to octave input) which then will vary its output frequency (tone). If you only use the sequencer and connect that to an amplifier only when set it to run at a very high speed will its output lead to something audible. Then the consecutive output levels are audible as a sound wave.
You can use a sequencer for all kind of stuff. One other example would be to control the cut off frequency of a filter over time.
Does this help?
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