2130 VCO (finally a larger VCO!)

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BugBrand
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2130 VCO (finally a larger VCO!)

Post by BugBrand » Wed Jun 09, 2021 4:27 am

Ready to produce now..
Wonderful TINY chip from Sound Semiconductor SSI2130 [here's a thread about the chip]
Great tracking & temperature stable
LinFM is being relabelled as Lin TZ (Through-Zero)
Shape (and Wave output) sweeps from Triangle through Saw to Pulse/Sqr (jumper setting - narrow pulse or 50/50 Square)

Not going for all the bells & whistles possible with the chip & not tricking out with CV inverters etc - but should be a nice solid 2FW design.
Not too far off with it now - panels ordered, PCBs to order shortly.
IMG_20210609_102221.jpg

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Katherine Alicia
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Re: 2130 VCO (finally a larger VCO!)

Post by Katherine Alicia » Wed Jun 09, 2021 5:23 am

Katherine Alicia wrote:
Wed Jun 09, 2021 5:19 am
that Linear FM input has me interested if the price is good, will you be doing other colors?
edited: Ok, nevermind, it`s not eurorack (the holes don`t look right).
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Re: 2130 VCO (finally a larger VCO!)

Post by BugBrand » Wed Jun 09, 2021 5:28 am

Katherine Alicia wrote:
Wed Jun 09, 2021 5:23 am
Katherine Alicia wrote:
Wed Jun 09, 2021 5:19 am
that Linear FM input has me interested if the price is good, will you be doing other colors?
edited: Ok, nevermind, it`s not eurorack (the holes don`t look right).
Yes, Banana Frac ;)

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T. Jervell
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Re: 2130 VCO (finally a larger VCO!)

Post by T. Jervell » Wed Jun 09, 2021 5:57 am

Looking good Tom🤩😍

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Re: 2130 VCO (finally a larger VCO!)

Post by batchas » Wed Jun 09, 2021 6:38 am

Always a pleasure to see Tom's new creations.
TZFM :sb: :sb: :sb:

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Re: 2130 VCO (finally a larger VCO!)

Post by deltaphoenix » Wed Jun 09, 2021 10:33 am

SWEET!


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Re: 2130 VCO (finally a larger VCO!)

Post by nikfrisbee » Wed Jun 09, 2021 1:15 pm

:headbang: A space is awaiting :-)

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Re: 2130 VCO (finally a larger VCO!)

Post by markeats » Wed Jun 09, 2021 1:25 pm

Looks great! Quad sine + this :party:

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Re: 2130 VCO (finally a larger VCO!)

Post by lud » Wed Jun 09, 2021 1:47 pm

So it's quite different (sounding) to the compact vco with the new chip and through zero capabilities? I guess that's desirable for richer FM modulation tones? Eager to hear more about it!

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Re: 2130 VCO (finally a larger VCO!)

Post by northerntao » Wed Jun 09, 2021 2:43 pm

2 V/Oct inputs?

Also, any clocking jumpers/pads on the back, or was that something specific to the circuit / chip on the Chirper?

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Re: 2130 VCO (finally a larger VCO!)

Post by Peake » Wed Jun 09, 2021 2:45 pm

:love:
This is not the place I'd imagined it to be.

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Re: 2130 VCO (finally a larger VCO!)

Post by chrisdermo » Wed Jun 09, 2021 3:59 pm

Looks awesome!
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Re: 2130 VCO (finally a larger VCO!)

Post by BugBrand » Wed Jun 09, 2021 4:39 pm

northerntao wrote:
Wed Jun 09, 2021 2:43 pm
2 V/Oct inputs?

Also, any clocking jumpers/pads on the back, or was that something specific to the circuit / chip on the Chirper?
The thinking with the two 1V/Oct inputs (well, other than right panel feel) was that sometimes you might want a regular source from, say, a keyboard/seq but then also an accurate one for transposing.

No clocking or output whatnots on the back, no. Just two jumpers - one for the mentioned Sqr/Pulse selection and another for AC/DC coupling for the linear FM -- I've almost invariably kept it set to AC coupled (which the datasheet calls Phase Modulation rather than Frequency Modulation).

****
Yes, I should do some demo sounds sometime. The pitch tracking coupled with the non-detuning nature of the linear FM is very good when playing a pair of them.

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Re: 2130 VCO (finally a larger VCO!)

Post by elmerfudd » Wed Jun 09, 2021 6:58 pm

I wondered what was going in those last 4 spaces. 2 for me please.

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Re: 2130 VCO (finally a larger VCO!)

Post by northerntao » Wed Jun 09, 2021 11:10 pm

BugBrand wrote:
Wed Jun 09, 2021 4:39 pm
northerntao wrote:
Wed Jun 09, 2021 2:43 pm
2 V/Oct inputs?
The thinking with the two 1V/Oct inputs (well, other than right panel feel) was that sometimes you might want a regular source from, say, a keyboard/seq but then also an accurate one for transposing.
Ahh, that makes sense - can sequence one and wiggle the other. Better than trying to passively “mix” two bananas!
Last edited by northerntao on Wed Jun 09, 2021 11:11 pm, edited 1 time in total.

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Re: 2130 VCO (finally a larger VCO!)

Post by neil.johnson » Thu Jun 10, 2021 11:18 am

:tu:
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Re: 2130 VCO (finally a larger VCO!)

Post by kosta » Thu Jun 10, 2021 12:57 pm

Digging that 2 x 1v/Oct situation there, Tom. Nice one.

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Re: 2130 VCO (finally a larger VCO!)

Post by DickMarker » Mon Jun 14, 2021 4:38 am

Looks interesting Tom, looking forward to hearing some demos!

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Re: 2130 VCO (finally a larger VCO!)

Post by dogoftears » Fri Jun 18, 2021 10:50 am

hmm, im missing PWM on this a bit, which also isnt available on the compact osc. is it possible w this chip?
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Re: 2130 VCO (finally a larger VCO!)

Post by BugBrand » Fri Jun 18, 2021 10:52 am

Yeah, I hear you - given my sort of layout approaches I'd initially thought on PW(M) but then felt that wave-mod was more interesting..
Possibly could have squeezed something in, but wanted to keep it spacious & relatively simple.
It absolutely is possible on-board with the chip.

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Re: 2130 VCO (finally a larger VCO!)

Post by BananaPlug » Sat Jun 19, 2021 10:38 am

That uncluttered approach is nice but kind of begs for various utility modules. Things like a comparator (for PWM). Perhaps dual or triple or combined with another function.
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Re: 2130 VCO (finally a larger VCO!)

Post by BugBrand » Mon Jun 21, 2021 3:51 am

You've always wanted a multiple comparator ;)
And I've *still* not done one ;(

Worth noting the powers onboard the SSI2130 chip - it has multiple wave outputs AND an onboard waveform mixer. I did wonder about implementing that & maybe will do another design sometime, but for now the onboard mixer is used to fade through the Tri/Saw/Pulse waveforms.

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Re: 2130 VCO (finally a larger VCO!)

Post by Brian2020 » Sat Jul 03, 2021 8:25 am

This is something that I’ve excitedly been waiting for since first reading that a new larger VCO was in the works. Nice clear layout and a great feature set without being crowded. Pleased to see that a Sine output was included in addition to the other waveforms that available from the shaped output. No doubt, this is going to be a great addition to the available lineup. Really looking forward to this being ready for purchase.

Would love to hear a demo of it in action!

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