Joined: Dec 15, 2007 Posts: 201 Location: Israel
Audio files: 2
Posted: Fri May 21, 2010 6:21 am Post subject:
Hi,
I am about to wire the front panel to one of my sequencers. As I had made room for a rate LED, I have some issues figuring out how to wire it as there is no indication for it in the docs.
Can I just add a small LED circuit to the gate out jack or is there a better way? _________________ Erez Yaary
I am about to wire the front panel to one of my sequencers. As I had made room for a rate LED, I have some issues figuring out how to wire it as there is no indication for it in the docs.
Can I just add a small LED circuit to the gate out jack or is there a better way?
Hello
Yes you could add an LED connected to the Clock Out signal.
You will need to use a current limiting
resistor, the voltage is 10v
Joined: Dec 15, 2007 Posts: 201 Location: Israel
Audio files: 2
Posted: Mon Jun 14, 2010 12:45 pm Post subject:
Hi,
Debugging the build of my first sequencer and I have some issues using the internal clock:
1. The gate length messes with the tempo. Reducing the gate length will increase the tempo while having some of the steps skip. Increasing the gate length to the max will remediate the issue.
2. The start/stop button just starts the sequencer, it does not stop it. D4 - side is always at +5v. PIN1 of 4013 is 0 when the sequencer is powered up and upon pressing START, it goes to 5V and stays there no matter if I press the START/STOP button again.
How to connect to achieve a gate out controlled from the portamento on/off? Is it just connecting to PIN3 of the PIC?
Have not connected the 4066 yet, but I guess it should not cause the issues as it handles just portamento on/off. _________________ Erez Yaary
Joined: Dec 15, 2007 Posts: 201 Location: Israel
Audio files: 2
Posted: Tue Jun 15, 2010 12:44 am Post subject:
I have swapped the CD4013BE with an MC14013BCP and the START/STOP is working properly.
Only issue is my previous port #1 where in low gate length, the internal clock jumps and skips steps and the tempo is faster with low gate length settings vs. high ones. _________________ Erez Yaary
Joined: Dec 15, 2007 Posts: 201 Location: Israel
Audio files: 2
Posted: Tue Jun 22, 2010 2:48 pm Post subject:
Hi,
Thanks for the tips.
1. Checked the suggested resistors, all are the specified values.
2. Oops. For got to wire the 10K to +5v. Did it and now the gate mode changes the gate out length, but the tempo issue is still present.
3. Found a possible issue, all my 22K are actually 20K. it was an error on my part not to check the values. Can it cause an issue?
4. +5 rail is stable as I turn the gate length pot.
5. IC2 is 4069UBE.
Possible 20K/22K mishap to cause this? _________________ Erez Yaary
Joined: May 16, 2005 Posts: 8932 Location: Birmingham, England, UK
Audio files: 11
G2 patch files: 1
Posted: Tue Jun 22, 2010 4:02 pm Post subject:
OMG
This thread is two years old , the YouTube vids, are probably the BEST modular demos on YT I have ever seen, and I completely, and utterly missed this thread!
Where was I? Where have I been?
What's an even bigger kick in the gonads, is that I came up with a concept for exactly the same idea, just before I joined this forum, but didn't have a clue how to build it (apart from using miliions of 4017 chips!). I've still got a bag full of rotary switches I had bought to start the project- but then the kids came along!
I'm really so pleased that you built this beautiful sequencer, Ryk. Well done mate! RESPECT!
So my big question I suppose is....Will you do a 5th run of boards? (I know it would be a 5th, because I've just spent the whole of the last hour trailing through all of this thread! )
Such a simple demo btw. A bassline and a melody. But the sequence keeps morphing and changing, so your brain has more to process, which means you keep the attention, and the track becomes more interesting. Very cool!
Tom _________________ ACHTUNG!
ALLES TURISTEN UND NONTEKNISCHEN LOOKENPEEPERS!
DAS KOMPUTERMASCHINE IST NICHT FÜR DER GEFINGERPOKEN UND MITTENGRABEN! ODERWISE IST EASY TO SCHNAPPEN DER SPRINGENWERK, BLOWENFUSEN UND POPPENCORKEN MIT SPITZENSPARKSEN.
IST NICHT FÜR GEWERKEN BEI DUMMKOPFEN. DER RUBBERNECKEN SIGHTSEEREN KEEPEN DAS COTTONPICKEN HÄNDER IN DAS POCKETS MUSS.
ZO RELAXEN UND WATSCHEN DER BLINKENLICHTEN.
Yes this might affect it, worth replacing.
Also double double check R48, as I think this
could be the only possible cause of you're problem.
Otherwise check carefully for possible shorts on the tracks.
So my big question I suppose is....Will you do a 5th run of boards? (I know it would be a 5th, because I've just spent the whole of the last hour trailing through all of this thread! )
Tom
Hello
Thanks for the comments.
There are actually some PCBs and PICs left from the last run, so
if anyone is interested then please send a PM.
Originally I did design this circuit without the PIC, just using 4017s
and AND gates etc.
It worked pretty well, even had the 4-gate modes, but really quite complicated wiring.
Here is a picture of the prototype ! [without all the switches and only 4 channels wired up]
-ryk
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Joined: Nov 22, 2009 Posts: 667 Location: Frederick, MD
Posted: Wed Jul 28, 2010 2:05 pm Post subject:
@ryktnk => Humble request...would you please post the latest documentation on the first page of this thread? It's rather difficult to locate as it is. Thanks!
@ryktnk => Humble request...would you please post the latest documentation on the first page of this thread? It's rather difficult to locate as it is. Thanks!
Joined: Dec 15, 2007 Posts: 201 Location: Israel
Audio files: 2
Posted: Sun Sep 26, 2010 2:47 am Post subject:
Hi,
Starting to use the sequencers (2 of them, one with 2.1 and the other with 2.0) to compose music and have found them particularly fun to do that Tangerine Dream ratchet effect.
One thing that struck me while going at it was the inability to externally control the gate mods. It would be especially effective to have external control over some of the sequencer parameters so that I can create a complex setup with multiple controllers changing each other.
On another note, one of my sequencers has its tempo range too low, i.e. I can not make it go faster than, say, 140BPM. Where would I look for the fault? _________________ Erez Yaary
Im going to make someone a m185 panel this week, and thought id post here just to make sure noone else is needing one?
They will be the 5u 3.0mm matt black ones. I can add ones for either version PIC to the run.
There's photos somewhere in the depths of this thread. If i get a chance later in the day, ill dig them out and repost on this post.
I also do sets of the little M2 and M2.5 screws to compliment these panels (to attatch the switches Ryk supplies) - these are in stainless steel, with nice looking allen cap heads.
The panels are GBP 55 each, the fastener sets GBP 4.5 each. Postage etc. is at cost price only.
Im making up the panels this week, so, if anyones keen, speak up, and ill add theirs to the job... : )
ps. i think i may even have 1-off 3u eurorack format panel in gloss black on the shelf for the project also. if anyones keen on this, i can check the (PIC) version that its made for... _________________
Hello
I finally got my panel design laid out on CorelDraw 12 , The stage counts & gate modes look close together but i am using Tall knobs for the 8 ways and short ones for the 4 ways , i've shoehorned the design into 200mm wide (8") by 250mm high (10") , all of my single panels in my modular system are 100mm X 250mm , so this is my first double module .
i decided to go for a rotary switch design after finding 15 of them in the back of my store cupboard .
Now i need to pop down to the local engineers workshop to get some 3mm alum guillotined.
Dave.
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Hello , almost finished populating the pcb , then it's time for wiring up , i love wiring , here's a pic of the 98% finished pcb and an eyebrow raising 1970's album sleeve from Mr Gorgio Moroder to cheer you up when soldering the M-185 , i hope i'll be sequencing like him when i finish building this heh.
Dave
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One thing that struck me while going at it was the inability to externally control the gate mods. It would be especially effective to have external control over some of the sequencer parameters so that I can create a complex setup with multiple controllers changing each other.
On another note, one of my sequencers has its tempo range too low, i.e. I can not make it go faster than, say, 140BPM. Where would I look for the fault?
Hello
Glad you are enjoying it !
For the tempo, you might want to try lowering the value
of R27 a bit. maybe 22k.
But I think 140BPM sounds a bit low, their might be another problem.
Is this with the clock division set to 1 ?
You can control the gate modes externally.
But will need a little circuit to limit/scale the voltage range to
a safe 0-5v, otherwise you might destroy the PIC !
See attatched JPG, for the circuit to do this.
Just apply the control voltage to the MD input on the main board, with
all the Gate Mode switches set to "0"
You can also use voltage control for, RANGE, SUBDIV, and MODE
as these functions are all selected by a voltage from 0-5V.
hurrah , finished the wiring , completed & working well , thanks for this amazing sequencer , i love this machine .
Only 3 stupid errors on my part when building this fab sequencer ....
Cv volt range select toggle switch .... i had 2 wires wrong way round .
Start/stop button not working .... bad soldering on R40 leg/pad .
Front panel ..... i drilled a hole for the cv in jack & marked mode 4 as cv stages , oops! i have V2.1 pic and they are not need , nevermind i know how it works and it works just fine heh .
Advice for anyone building this .... read the documentation again & again when designing & constructing, then when you are ready to wire, study that panel connections pdf. intensely
i'll post some mp3's soon , too much fun to switch it off
Thanks again ryk.
Dave.
Epicyclus
Orchard
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, the YouTube vids, are probably the BEST modular demos on YT I have ever seen, and I completely, and utterly missed this thread!
.
, here's a pic of the 98% finished pcb and an eyebrow raising 1970's album sleeve from Mr Gorgio Moroder to cheer you up when soldering the M-185 , i hope i'll be sequencing like him when i finish building this 
