[Project] Random Looping Sequencer / Turing Machine

Mongo1 · Post by **Mongo1** » Sun Jun 03, 2012 9:43 am

Thanks Tombola,

I am planning to do a dual module, so I may end up doing something like mounting two of these to a perf-board, mounting that to a bracket, and then doing wire jumpers to the front panel components. I won't be able to do the twinkly lights, but I think I can live without them.

Gary

Tombola · Post by **Tombola** » Sun Jun 03, 2012 9:50 am

Dual module would be great. Unfortunately there aren't really any economies of scale - you could share the noise gen, but that's about it.

You should pull out all the blinkenlights into a 16 step circle!

Mongo1 · Post by **Mongo1** » Sun Jun 03, 2012 10:04 am

Unfortunately there aren't really any economies of scale

Well, this looks like a pretty low-cost build anyway. Surely there must be some way we could redesign it so the shift registers are implemented with 8 Vactrols

Gary

sduck · Post by **sduck** » Sun Jun 03, 2012 12:44 pm

I've just ordered 20 pcbs. I'll probably use 2 and keep another 2, so the rest are available. I'm in central USA, so the overseas folks should probably use the other group buy. I'm not trying to step on the toes of anyone who might also be doing a buy of these pcbs, so I'll sell them to anyone for the cost of the pcb and basic shipping, so around 2.25 per pcb and the cost of a padded envelope and a stamp - probably the cheapest pcb you'll buy for a while! PM me if interested. If there's a huge response (probably not) I might make another order.

raisinbag · Post by **raisinbag** » Sun Jun 03, 2012 4:38 pm

Sent ya a pm sduck. Can you put aside 9 of those? Cheers.

sduck · Post by **sduck** » Sun Jun 03, 2012 7:21 pm

Ok folks, all the ones in my little run of 20 boards have been spoken for. I'll let you all know when I get them. I'd rather not accept any payments until I actually have these things here in my immediate physical presence. I'm new to the group buy organizer thing, and I've never dealt with pcbs or this company before, so I need to see how it works out before deciding to do another run of them.

Thanks Tombola for making all this possible!

janvanvolt · Post by **janvanvolt** » Sun Jun 03, 2012 7:51 pm

I've just ordered 10 and also trying to get some decent acrylic panels.
i am located in germany. i _might_ do a groupbuy for the panel + pcb

limpmeat · Post by **limpmeat** » Sun Jun 03, 2012 10:02 pm

Anyone else from Australia want to split a PCB order? I'd take 2.

rowman · Post by **rowman** » Sun Jun 03, 2012 10:39 pm

limpmeat wrote:Anyone else from Australia want to split a PCB order? I'd take 2.

I'm down for that, I'll take 2 also.

asterisk · Post by **asterisk** » Sun Jun 03, 2012 11:00 pm

thanks sduck!

Tombola · Post by **Tombola** » Mon Jun 04, 2012 3:38 am

Double!

FetidEye · Post by **FetidEye** » Mon Jun 04, 2012 3:50 am

wow, i thought that the left panel was the right choice..
But when I see the right one in working order... It's WAY cooler and more spaced out!!!!

Tombola · Post by **Tombola** » Mon Jun 04, 2012 4:04 am

Get one of each!

Spandex · Post by **Spandex** » Mon Jun 04, 2012 4:12 am

Great docs too. Did you have any thoughts about what the expansion header could be used for? I was just thinking about random looping gate sequences.

Tombola · Post by **Tombola** » Mon Jun 04, 2012 4:21 am

Spandex wrote:Great docs too. Did you have any thoughts about what the expansion header could be used for? I was just thinking about random looping gate sequences.

My thoughts so far:
1. Random (but repeating) gates
2. Random triggers via http://www.cgs.synth.net/modules/cgs24_ ... igger.html
3. Buffer some of of the data lines, then run them through slider potentiometers, then sum them back together, to make a mini-Klee. Essentially a user configurable D/A converter. I think many sliders are dual gang, so you could have two mirrored outputs.
4. Add more D/A converters, being fed from different points in the loop, to create canon / Analog Shift Register effects (might require a bit more calibration than I'd like)

Just a shame I ended up using such a weird shaped expansion header - I didn't want to run those 8xdata lines anywhere else around the PCB.

Navs · Post by **Navs** » Mon Jun 04, 2012 10:33 am

Bloody marvellous, Tom!

FetidEye wrote:wow, i thought that the left panel was the right choice..
But when I see the right one in working order... It's WAY cooler and more spaced out!!!!

tony d · Post by **tony d** » Mon Jun 04, 2012 6:03 pm

Ok, i ordered 10 of these as well so if your in the states and want one i'll be selling 7.
Pm me and when the boards show up will figure out how to square up.
Also, like Sduck i'll sell them for the cost and a couple bucks for postage and a mailer.

EDIT:
2 reserved for Patchdub
2 reserved for Mikecameron
2 reserved for max
1 reserved for bennybones

limpmeat · Post by **limpmeat** » Mon Jun 04, 2012 8:24 pm

I have ordered 10 PCBS.

If you are in Australia, let me know if you are keen. So far there are 6 that are unspoken for.

EDIT They are all spoken for

limpmeat · Post by **limpmeat** » Tue Jun 05, 2012 1:26 am

So...

I had one issue with submitting the PCB artwork with Itead studios. They were confused as to whether the holes below are circular or rectangular. After talking to Tombola, he confirmed they are circular. Hope this helps someone.

marvkaye · Post by **marvkaye** » Tue Jun 05, 2012 7:14 am

I ordered 20 of these (a dozen are spoken for in case anyone wants some here in USA), and had the same problem with the order. I looked at the build docs and available photos and couldn't see anything remotely resembling rectangular holes so I told them the circles were correct. They replied with an ok late last night so the order progresses. Pretty exciting. Thank you for sharing this with us, Tombola.

<marv>

diablojoy · Post by **diablojoy** » Wed Jun 06, 2012 7:46 pm

limpmeat
pm'd

sduck · Post by **sduck** » Wed Jun 06, 2012 10:21 pm

Odd, I just sent them the zipped file of gerbers that are linked on the first page of this thread, and they didn't complain at all.

Tombola · Post by **Tombola** » Thu Jun 07, 2012 2:22 am

Yes, I only posted this after having sent those exact gerbers (minus one screenprint layer change), waiting 3 weeks and building the resulting board.

I find it hard to visualise ITead studio - might be two guys in a bedroom, might be a whole factory - although the order numbers are pretty low and don't go up very fast. There's an nice clip in their blog of how they do these proto orders, panelled together into bigger batches. I think (from a half-remembered comment somewhere) that they use the same fab house as seeedstudio - the same specifications etc.

The curious thing about this rectangular hole thing is that a rectangular hole would probably make sense in that position - I guess somewhere in the ('official') library that I used is a left over rectangular hole layer from an earlier version.

zab · Post by **zab** » Thu Jun 07, 2012 3:52 am

limpmeat wrote:So...

I had one issue with submitting the PCB artwork with Itead studios. They were confused as to whether the holes below are circular or rectangular. After talking to Tombola, he confirmed they are circular. Hope this helps someone.

This helped me. thx!

I ordered 10 of the pcb. i have 4-5 plus, i will let you know if they are available. I'm in europe, but if you pay the postage, doesn't matter where you are.

HueMonContact · Post by **HueMonContact** » Thu Jun 07, 2012 11:35 am

I'm ordering 10 pcbs tonight and I've been working on a panel for my diy case. Here's my ruff draft so far.

I may add some features before completing my panel layout.
This is going to be a fun project. Thanks for sharing Tombola!

MOD WIGGLER

MOD WIGGLER

[Project] Random Looping Sequencer / Turing Machine