Grayscale Permutation: expanded Turing Machine + Voltages

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sempervirent
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Grayscale Permutation: expanded Turing Machine + Voltages

Post by sempervirent » Sat Jul 08, 2017 9:20 pm

[video][/video]


I've been dropping hints about this project for a while, and although it's not quite ready for release I wanted to get some feedback... these modules are based on the Turing Machine and its expanders (with permission from Tom Whitwell). What started as a straightforward SMD conversion of the originals morphed into something new, with some extra features added, such as:

- Arbitrary sequence lengths from 1-16, with VC
- Bipolar VCA for the sequence output (+/-8V range)
- Improved clock input circuitry to work with a wider range of sources

The 18hp version includes:

- Pulse outputs for each of the 16 bits (+10V): built-in Pulses expander
- Pause switch (skip external clocks to pull sequence backwards in time)
- Clock switch (generate internal clocks to push sequence forward in time)
- Inverted output (also controlled by the VCA)
- Clock output (regenerated clock input)
- VC over the Clear and Write switches (program the shift register externally)

The 12hp version lacks the luxurious extras of the 18hp version, but retains the core functionality including VC over the three knob parameters, and pulse outputs for the first 8 bits.

The 6hp version is a minimal take on the concept, with an assignable CV input (labeled CTRL) that can be routed to one of three parameters (Shift, Bits, or Amp) by holding down the Clear/Write switches for 500 ms. The SEQ output has a range from 0-8V and the GATE output maps to the first bit of the shift register.

Variant is a compact version of the Voltages expander, with VC over both of the outputs and a jumper option for controlling whether the Positive and Negative controls handle attenuation or offset (versus the fixed choice of the original). Variant connects to the "gates" header on Permutation, which can also be used to drive the original Voltages and Vactrol Mix expanders (check the video above for an example of the original Voltages expander being used). Variant will also be compatible with the original Turing Machine.

Image
Last edited by sempervirent on Wed Sep 11, 2019 5:52 pm, edited 12 times in total.

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Trebbers
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Post by Trebbers » Sat Jul 08, 2017 10:37 pm

Looks fantastic! I vote 18hp. W/other versions of the same concept out there, it seems like it would make more sense for a new alternative to differentiate as much as possible w/features vs. economizing on space.

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wirelesswine
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Post by wirelesswine » Sat Jul 08, 2017 11:05 pm

Go big! Love the concept and additions to the original!

pscl
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Post by pscl » Sat Jul 08, 2017 11:26 pm

The 18HP is the way to go for me. Love the all-in-one panel version you did of the Turing Machine, so it would make sense with this too. The additions are worth the HP. :banana:

Any way to add a quantized voltage somewhere?

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bobbcorr
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Post by bobbcorr » Sat Jul 08, 2017 11:29 pm

It's full of stars...

:mygod:

Also +1 for the 18HP.

Well done!

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Post by noeticsound » Sat Jul 08, 2017 11:30 pm

I'd also favor the 18 hp version. Demo is hot! Looking forward to this.

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Abyssinianloop
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Post by Abyssinianloop » Sat Jul 08, 2017 11:36 pm

Can they recall saved sequences after power cycle? That's what I wish most of my origianl TS. In any case, looks good. I tend to go for smallish sized modules, but I'd say keep maximum features if possible.

basicbasic
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Post by basicbasic » Sun Jul 09, 2017 12:24 am

Will there be a DIY version or just pre-built?

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Post by tarmoog » Sun Jul 09, 2017 12:47 am

One "gates" expander input only or more?

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Nielsen
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Post by Nielsen » Sun Jul 09, 2017 1:42 am

Looks great! I would prefer the smaller version since I won't need the extra features. I like the VCA implemenation. One thing I love about the Turing Machine is his small footprint.

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Post by pld » Sun Jul 09, 2017 1:42 am

Abyssinianloop wrote:Can they recall saved sequences after power cycle? That's what I wish most of my origianl TS.
Without an MCU with non-volatile storage that seems unlikely (unless supercap? or battery?) so it might depend just how far it morphed from the original (which didn't have an MCU). Similarly with the quantizer.

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Post by ignatius » Sun Jul 09, 2017 2:04 am

make the big one. those black panels are dope. looks great really. i like the layout.

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mazzyboy
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Post by mazzyboy » Sun Jul 09, 2017 2:49 am

Abyssinianloop wrote:Can they recall saved sequences after power cycle? That's what I wish most of my origianl TS. In any case, looks good. I tend to go for smallish sized modules, but I'd say keep maximum features if possible.
+1 for this! This would be a total game changer for me.

voldemar_p
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Post by voldemar_p » Sun Jul 09, 2017 4:52 am

Give me one please!!!

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tFunk
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Post by tFunk » Sun Jul 09, 2017 5:49 am

Looks very cool!
+1 for the silver 18HP one.

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jwm
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Post by jwm » Sun Jul 09, 2017 10:03 am

i suppose all this will depend on pricing, but for me, i think i'd prefer the 12hp one, since invariably i would have to pair it with a quantizer.

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secrethero303
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Post by secrethero303 » Sun Jul 09, 2017 10:43 am

I think I'd prefer the 18hp layout. The ability to control clear and write from CV seems useful.

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IstvanM
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Post by IstvanM » Sun Jul 09, 2017 11:09 am

Another vote for the 18hp. This looks great!

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thetaflux
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Post by thetaflux » Sun Jul 09, 2017 11:57 am

I vote 12hp. a very nice size with still a ton of functionality for those of us with small systems!

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Groundloop
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Post by Groundloop » Sun Jul 09, 2017 12:34 pm

Very interested in the full featured 18hp version, in black. :tu:

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windspirit
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Post by windspirit » Sun Jul 09, 2017 12:59 pm

Could you maybeale the 12 hp version and ass the extra features to another 4hp expander? I know that would make a second expansion port but this way everyone gets what they want ;).

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Post by Bambou » Sun Jul 09, 2017 1:21 pm

I vote for the 18 hp !
mazzyboy wrote:
Abyssinianloop wrote:Can they recall saved sequences after power cycle? That's what I wish most of my origianl TS.
+1 for this! This would be a total game changer for me.
Same here.

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mortal3
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Post by mortal3 » Sun Jul 09, 2017 1:30 pm

18hp here as I have exactly that space 'free'...

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Post by gusmns » Sun Jul 09, 2017 5:09 pm

Bambou wrote:I vote for the 18 hp !
mazzyboy wrote:
Abyssinianloop wrote:Can they recall saved sequences after power cycle? That's what I wish most of my origianl TS.
+1 for this! This would be a total game changer for me.
Same here.

+1

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pulsewidth
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Post by pulsewidth » Sun Jul 09, 2017 5:31 pm

I feel that the 18HP version makes a lot of sense. Count me in for one!

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