M185 sequencer Project - NEW PCB VERSION

[ryktnk]

[oozitron]

After a long time away, I'm coming back to this project... VER 2.1

I have wired up just a few controls for initial testing:
Max Stages = unwired = so it is "1"
Seq Mode = unwired = so it is "forward"
Step SubDiv = unwired = so it is "div by 1"

CV Out, Gate Out, Clock In = all wired up

Port time = all wired up (set to min)
CV range = wired to 5v

Per Stage:
LED = unwired
CV = YES wired up
Stage count = unwired
Gate mode = unwired

So I power it up and the CV slider for Stage 1 works perfectly, outputting 0v ~ 5v as expected.

Then I feed it ONE pulse into the CLOCK IN and the CV output goes from 0v and just goes down down down. I shut it off at this point thinking that damage might be happening.

Earlier I had a wiring problem that was making the TL074 get really hot. I've replaced the TL074.

Did I maybe fry my "2.1 programmed" chip?

thanks for any help...
Drew

[ryktnk]

[adambee7]

Anyone got any s/pole 8 throw slide switches hanging around. i have a broken one.

[adambee7]

Hi Ryk, Sent you PM.

[julian]

Hello,

I have been going through stuff here, and i have a few m185 panels left.
The chances of me cutting any more of these now is slim.

Anyhow, i have the following -


1-off Gloss Black 3u Euro panel v2.1 O/S
1-off Silver with Blue infill (think Buchla style) 5u panel v2.0 O/S
1-off Silver with Blue infill (think Buchla style) 5u panel v2.1 O/S
1-off Matt Black with white infill 5u panel v2.0 O/S WITH Layout for per-stage Portamento switches.

I have some fastener sets left, although i may not have enough for all of the above - i would have to check. Fastener sets (well, and panels) availible on a first come first served basis.

All of the above are final revision panels.


Price - GBP 60 per panel. No difference in cost between formats / revisions. This offers no reduction on my last advertised price, however, as i say, this will probably be your last oppotunity for these items.

(i know that i can always cut more, but this panel requires so many cutter changes that theyre not the most economic to make in 1-off quantities, and there probably isnt enough demand to cut in more than 1-off quantities any more - hence the catch 22)

Fastener sets, whilst they last, are GBP 4 per set. These are the correct mix of M2 and M2.5 screws to match the switch sets Ryk sent out. The M2 screws are not the easiest to find in small quantities, hence me buying a load and making up sets. The fastener sets are in nice, shiny, stainless steel, allen cap configuration. Theyre the same manufacturer, but different configuration, to the units i use on the x0xb0x builds (so if youre wondering what they look like you can look at those photos)


I will try and take some photos of these panels, and update this post shortly.


Oh - one last thing. Im in the United Kingdom, but can, and do, ship world wide. Postage from me is always at cost price only. Packing is without charge. The company has accounts in GBP and Euro and cards can be processed using Google Checkout (surcharged at cost).

Thanks, Julian

[Bastian]

Hi ryk, Julian, others...

I see you're still busy with the project, can you tell me if there's any way of getting hold of a pcb and pic of the 2.1 version? The project keeps popping up in my mind now and then after hearing of it this summer.

I tried using the software version in combination with a midi to cv unit, but this is defenetely not the same

Are there files available to produce the pcb and pic yourself just to get started?

Bastian

[julian]

Ryk will, im sure, confirm, but...

I think the PCBs will probably always be availible from Ryk, however, the switches were purchased by him in bulk somwhere, and theyre not easily found elsewhere.

So, if Ryk has none left, and is not intending on (or can not) get more, then that's that for the switches.

The project can, however, be built with rotary switches. When the project was more current, i laid out a panel for use with rotaries, however, then activity seemed to drop off, so i did not put the panel in to production.

It seems that most want to build with the slide switches, if they can get them.

[adambee7]

i'm thinking of building 2 more. thinking of mini rotary switches and porta on each step.

[adambee7]

the panels you did for me julian are nearly stuffed. just purchasing 4 10unit cases for them. people should see your work so i'll post pics up in the next month or so.

[nerdware]

I've nearly sourced all the parts for mine. I'm just struggling a little with the LEDs and port switches - none of the LEDs and switches I have fit the holes, but that can be fixed.

BTW, my PIC has the 2.1 firmware, but it appears that I have a panel for the 2.0 firmware, with holes for the port switches. If I understand correctly, this means I can use the port switch mod and leave the Stage CV socket unused.

I'm trying think of a way to use that spare socket, but my modding skills are very poor. I'll be happy just to get this thing working! However, the best idea I have so far is to use a gate-to-trigger circuit to provide a Stage One pulse. Has anyone else done anything like this?

[patchdub]

i'm thinking of using rotaries for the 8s and slides for the 4s.
will this work for the 4 switch?
http://www.mouser.com/ProductDetail/TE-Connectivity-Alcoswitch/STS1400PC04/?qs=sGAEpiMZZMtHXLepoqNyVVTetbDyzIXJB747LDBtUGU%3d
or does anyone know of a better option?
thanks!

[julian]

for all the trouble supporting that switch from the panel, i think i would just use rotaries.

[julian]

This was as far as i got with rotaries -



(the large white circles are not the knobs, but the space that the switches take up behind the panel)


The panel is still 3u, and uses those cheap 12way rotaries for all switches.

If there was a revival of interest in this project, i would confirm the panel, and cut a few.

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[julian]

[nerdware]

[Bastian]

[julian]

[emdot_ambient]

[julian]

This panel -



..was laid out to be able to use these (cheap, widely availible) switches -





Like i say, i have not tested the panel yet, and i last worked on it, probably, over a year ago (!) but i think it should work, and i dont think it will really be much more cluttered than the slide switch version (remember, the large white cicles are *not* knobs, but the area the body of the switch takes up behind the panel)

[julian]

....i guess what i am trying to say is that, whilst i (and many others) recieved the slide switches from Ryk, i do not think that the lack of availibilty of them now should kill this project.


Indeed, if i were to start over, i may even opt for using rotaries, rather than slide, simply due to their availibility. Again, i always try and stay away from 'rare' parts, so that i know things are repairable in the future, when they go wrong. For me, the use of a comonly availible part in a design is much more desirable than a rare one.

[emdot_ambient]

[adambee7]

http://www.rapidonline.com/Electronic-Components/Cylindrical-3mm-through-panel-LEDs-60441

i'm going to use these. should fit.

[Bastian]

I've bought a spare pcb from a forum user.
I'm sourcing the parts to populate the board but some parts are discontinued. Can someone tell me if the following parts will do instead of the old ones?

old: 2N3819 (Vishay) new: MPF102_D27Z (Fairchild)
old: 4069UB new: 4069UBE

Thanks!

Bastian

(b.t.w. I'm trying to get some samples from china for the 1p8t switches from Kwanda Industrial Co. not sure if it's going to work, I'm waiting for a reply from them)

[Bastian]

It worked! They're sending 32 1p8t and 32 2p8t sample switches.