Neuron / Difference Rectifier PCBs

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KNYST
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Post by KNYST » Sun Aug 25, 2013 4:13 pm

Interesting designs. I have some simple queries...

Can the Difference Rectifier be used as a common rectifier, as in: a single bipolar signal in -> fully rectified (plus and/or minus) out?

If no signal goes into the Neuron, will it be able to generate offset?
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Post by andrewF » Sun Aug 25, 2013 10:17 pm

If there is nothing on the inputs of the neuron, you can adjust the knobs to get a DC signal from approx -10V to +5V on the output.

If you put a bipolar signal on one of the negative inputs of the diff-rect you get the inverted pos and neg components on the appropriate outputs, see pics (input signal is the uppermost trace). So not quite a common rectifier but almost :hihi:
Bottom pic is with different freq tri waves on the +ve and -ve inputs
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dr 2tri.jpg
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dr trap neg input.jpg
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KNYST
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Post by KNYST » Mon Aug 26, 2013 1:12 am

Cool! Thanks :guinness:
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Post by kurodama » Sat Sep 07, 2013 8:28 am

I guess you've all seen this by now, but just in case:
I'm making a panel for this PCB, a dual one (for two PCBs) and I'm almost ready to go into production.
more info here: viewtopic.php?t=90763&highlight=

Here's a preview:
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Post by mOBiTh » Sat Sep 07, 2013 8:48 am

are the PCBs still available please?

I thought I ordered 4 but now I'm not sure?? :hmm:

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Post by andrewF » Sat Sep 07, 2013 11:14 am

mOBiTh wrote:are the PCBs still available please?
yep still got boards :party:

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Post by synchromesh » Mon Sep 09, 2013 11:48 pm

kurodama wrote:I guess you've all seen this by now, but just in case:
I hadn't seen it - thanks for the pointer! :tu:

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Post by knob_alchemist » Fri Nov 08, 2013 7:50 am

I'm in doubt to build this module....curiosity: is possibile with this circuits to have even results similar to a Wogglebug???

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Post by andrewF » Fri Nov 08, 2013 12:09 pm

if you mean - can you get semi-random mad-as-batshit CVs coming out of it.....well yes you can. The diff-rects would be best for that, depending what signals you input.

The wogglebug is a completely different circuit though.

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Post by kurodama » Sat Dec 07, 2013 8:01 am

here's my latest build.
I might have some for sale soon.

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yan6
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Post by yan6 » Sat Dec 07, 2013 11:56 am

Oh I hope its not too late for the panel

Edit: argh sold out :bang:

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Post by synthcube » Sat Dec 07, 2013 6:16 pm

We do still carry some of the clarke68 euro panels for this module in both a single and dual version, if that helps 8_)
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Post by yan6 » Thu Jan 23, 2014 8:29 am

Can someone describe how the switch on the synthcube/Clarke68 panel is supposed to be wired.

Also, my pcb board has 3 'i' inputs, I take it this is a newer version and the 100k for the third input in now on the pcb?

thanks in advance

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Post by andrewF » Thu Jan 23, 2014 9:35 am

yan6 wrote: Also, my pcb board has 3 'i' inputs, I take it this is a newer version and the 100k for the third input in now on the pcb?
yes, the newer version of the PCB has 3 inputs and does not need the flying resistor if using 3 inputs.
yan6 wrote: Can someone describe how the switch on the synthcube/Clarke68 panel is supposed to be wired.
ummm :hmm: I guesss Clarke68 knows for sure, but I assume wire the outputs of each neuron the the switch, say the centre pin, and then wire the lower pin of the switch to the 3rd input. So a SPST switch will do.

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Post by andrewF » Tue Mar 04, 2014 1:32 am

Got some NLC Eurorack panels in stock
10hp AU$22 (approx US$19.50)
$5 shipping per order

Still got PCBs: AU$8 each

These are designed so the pots can be soldered onto the PCBs and then attached to the panel, so no need for brackets or wires to the pots and suitable for shallow cases.
CNC'd & screenprinted by Jemal in very fkn sunny WA

The pics are of the same panel, one outdoors in the shade, the other in my shed.
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Post by synthcube » Thu Jul 10, 2014 11:27 am

happy to report that full kits for the neuron/diff are available now!

http://synthcube.com/cart/index.php?rou ... uct_id=444

thanks to andrew f for the collaboration and clarke robinson for the panel design.

dual euro kits and MOTM kits coming later this week
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Post by MacSynth » Thu Feb 19, 2015 2:51 pm

yan6 wrote:Can someone describe how the switch on the synthcube/Clarke68 panel is supposed to be wired.
I second that question. My module is ready to be wired and I can't think of a logical way to wire the switch. The synthcube kits with the clarke68 panel come with two jacks for input and one SPDT-switch for each of the two neurons.

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Post by synthcube » Thu Feb 19, 2015 3:25 pm

We will come back with a diagram shortly
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Post by MacSynth » Thu Feb 19, 2015 3:44 pm

synthcube wrote:We will come back with a diagram shortly
Great! :banana:

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Post by andrewF » Thu Feb 19, 2015 6:56 pm

MacSynth wrote:
yan6 wrote:Can someone describe how the switch on the synthcube/Clarke68 panel is supposed to be wired.
I second that question. My module is ready to be wired and I can't think of a logical way to wire the switch. The synthcube kits with the clarke68 panel come with two jacks for input and one SPDT-switch for each of the two neurons.
I checked back thru Clarke's messages and found this -
Idea here is the switch would bring the output of the other Neuron into the 'ext' input. If both switches are flipped, you've got a feedback loop

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Post by synthcube » Thu Feb 19, 2015 7:57 pm

take a look at this
its only a partial view for the switches and connections to EXT and O for the dual neuron

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Post by andrewF » Thu Feb 19, 2015 9:22 pm

I should point out:
if you have the PCBs with the 'ext in', there needs to be 100k resistors between the switches and the 'ext in' hole (see pic).
If you have the 3 input PCBs, no need to add the resistors
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Post by MacSynth » Sat Apr 04, 2015 1:00 pm

Thanks! Just saw this today. :guinness:

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Post by ablearcher » Mon Nov 09, 2015 10:18 pm

reviving the thread to post a song based around the neuron, recorded the melody the first weekend I got the thing built, I think it illustrates the taint tickling qualities well..

really simple melody from sh-101 sequencer running into the neuron along with the output of the vactrol pill and an envelope then fed into the cv input of the rubicon. I don't think any wiggling was involved, the neuron just kept flipping out and acting like jimi hendrix and setting the axe on fire.

drums from a tama techstar and a little bit of melody at the end from sh-101. some delay added to the neuron lead.

[soundcloud url="https://api.soundcloud.com/tracks/231914372" params="auto_play=false&hide_related=false&show_comments=true&show_user=true&show_reposts=false&visual=true" width="100%" height="450" iframe="true" /]

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