so been in a funk for awhile haven’t finished any synth projects or even turned on the all ready built modules . well got the bug this week and here is the results so far .
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Whose design are the VCAs?
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Looks like MFOS to me.
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MFOS [ music from outer space ] .
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First time using stencil and hot plate. Worked perfectly! Makes those smt components a tad less annoying.
While placing I did discover that 1 component I ordered hadn’t arrived yet and is on backorder. So that’ll need to be soldered in later .
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D9 missing from the build?
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Yup! Noticed with assembly the part didn’t come with an order I made, but was on backorder. So I’ll have it in a couple of weeks.
Haven’t built a module in a while, but had a lot of fun the other day making this diy cassette tape delay inspired by soaringtortoise on youtube
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I built a slightly modified version of @clarionut’s daughterboard for switching between gates and pulses outputs from a Turing Machine / Halting Problem:
My version somewhat rearranges the components and adds a Molex header for the connection to the panel switch and gate jack. For this one I chose not to use the jack so I omitted the components associated with that.
It’s made to go with my HP Gates module, with the toggle switch added to the front panel.
Looks good on the bench, haven’t tested it in the synth yet though.
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Looks good. Hope it works well in the synth!
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This TOM DRUM has four independent tuned percussion voices in a single Eurorack module.
It’s sort of the first bit from this thread: Twin T Drums (Practical Electronics 1978)
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Will right now after I made a simple template to drill holes in an a pair of odd speaker fronts (eight 2" speakers in each column), I will finally after 14 year start hooking up the panel of the Minisonic to the pcb. In order to get the job done and not being put off, I will take a few modules a time.
Else I am much into iPod Classics and will refurbish mine and await another (working/not working?). I am to replace the screen in mine, get a 160GB SDD, a new battery and a new shell.
The one coming in, will net a new front shell and a new battery. Maybe I will have to replace the disc.
PS. I’ve got CGS Drum Simulator: https://www.elby-designs.com/webtek/cgs/cgs318/cgs318.htm
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My first small case is almost finished. One more 8hp module on the top row and a passive 4hp utility module in the bottom row, then I need two start planning my second (larger) case. The two blindplates in the bottom right hide the power supply and distribution.
On top of the case sits a lm386 based speaker, I built for testing purposes on the work bench.
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No texts, no input no output markings, no nothing ?! So … what does it all do?
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My guess, from left to right, top to bottom,
sequencer, dual VCA, VCO, LFO, LFO/oscillator (?), output mixer, mixer, VCF…
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Initially I just couldn’t decide on a design and method for labeling, so I just left plain. Somehow I grew to like the look… makes it look a bit mysterious maybe? Also I never had any problem remembering what is what, but I think eventually i will add labels. I have an idea for this but still have to try if it works out…
Top row left to right are: gate sequencer, dual vca, looping envelope and lfo
Bottom row:
Dual drone osc, vco, Mixer with white noise and distortion, diode ladder filter
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As a somewhat dysfunctional dyslexic creator
I like to use a more tactile and positional set-up.
In the olden days my keyboards, guitars, mic’s etc were smothered in little pieces of fabric band-aid; for blind-on-stage braille-like guides; keys, knobs, settings etc. It worked, but cleaning it off after 30+ years was tedious, left clean spots and completely ‘healed’ three out of four inputs!
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I got… 6/8. Not bad I think!
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I’ve been working on a CV controllable clock multiplier. It is still in its experimental stages.
As a working title, the dudes and dudettes from the marketing department told me to use
“Ratchet-O-Matic”.
It basically consists of an arduino nano that is fed a clock signal, which it then either multiplies, usable for ratchets, or divides usable for skipping notes. The current version supports a pot for selecting the multiplication/division factor and another pot which determines the odds that a ratchet will take place. There are also CV inputs for these. Multiply this by 2 because the nano serves 2 independent outputs. So you can e.g. have one output ratcheting and one dividing. In the picture you can see some of the blocks I made using some basic IO components which on their own are difficult to connect to a bread board. The most usefull are the ones that allow me to connect 3.5 mm jacks to the bread board. You see some pots and buttons here as well.
There is a short video on my insta.
In this video Ratchet-O-Matic is connected to a 960 sequencer and it is controlled by its 3 rows of potentiometers. The top one determines the pitch of the sound, the second the ratchet count, the third one determines what the odds are for a ratchet (instead of a single note) to occur. In the video the output pulses of the nano open/close a VCA that is fed the signal of an oscillator which plays the pitch values from the top row of the 960 sequencer.
Technically the circuit is rather basic. The crux lies in the software. The nano responds to a clock pulse and then either produces faster copies of it = ratcheting, or waits a few pulses before outputting a pulse = dividing. This is done via an interrupt service routine and involves setting the Timer1 and Timer2.
I’m currently drawing up a schematic and designing a PCB. So … more info will follow.
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