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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
simple 8 step sequecer for SL
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Pehr



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PostPosted: Fri Aug 19, 2005 12:05 am    Post subject: Reply with quote  Mark this post and the followings unread

But how does the manual step fw work? What happens when I push the button? Does the sequence stop? Confused
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dnny



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PostPosted: Fri Aug 19, 2005 1:49 am    Post subject: Reply with quote  Mark this post and the followings unread

Pehr wrote:
But how does the manual step fw work? What happens when I push the button? Does the sequence stop? Confused


if you have turned the clock off (555 timer) or if you are running the clock at slow rate. when you push the manual step fw button the sequencer jumps to the next step (and stays there until you push again or the clock start beating).

its useful when setting up the potentiometer values

if you switch the clock off while the sequence is running it stops and when you turn it back again it continues from there

daniel

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Pehr



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PostPosted: Fri Aug 19, 2005 2:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

Aha, I see. So when pin 14 on 74HC4017 is grounded it steps forward, right?

Could the CV be connected to both the VCOs at the same time?

I'm thinking abaout building this one into my new SL, just have to make a PC board...
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dnny



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PostPosted: Fri Aug 19, 2005 9:26 pm    Post subject: Reply with quote  Mark this post and the followings unread

Pehr wrote:

Could the CV be connected to both the VCOs at the same time?

I'm thinking about building this one into my new SL, just have to make a PC board...


both VCOs can be run by this. yes.

if you come up whit something reasonable. say like stripboard layout for the sequencer please post it here. i have so far only a breadboard-prototype and its messy. (I'm working on it but there is so much to do these days. so it might take some time to get it from me)

have you got your SL up and running ? i have my SL still on construction. . . so i haven't been able to test the sequencer on it - it should work but i don't know maybe there is something that needs to be fixed.

almost everything can and should be fixed

daniel

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Pehr



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PostPosted: Sat Aug 20, 2005 12:24 am    Post subject: Reply with quote  Mark this post and the followings unread

No my first SL is also still under construction, I got all the parts for the front panel yesterday. Very Happy

I think I'll also add a momentary reset button when I've figured out how that works Razz

I will try to make a PC board layout after I'm finished with the SL, I've never made a PCB before so it might take a while... Confused
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Uncle Krunkus
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PostPosted: Sat Aug 20, 2005 5:16 am    Post subject: Reply with quote  Mark this post and the followings unread

I'll be doing a stripboard layout for this sequencer just as soon as I get my SL finished. That shouldn't be too far away, I'm doing the interconnections to the front panel now, and I just ordered the LFs. I designed a stripboard layout for my SL so it shouldn't be too hard to do the sequencer.
I might even start it before the SL is finished, but I wouldn't be able to gaurantee it's accuracy until I've built it.

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dnny



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PostPosted: Sat Aug 20, 2005 5:45 am    Post subject: Reply with quote  Mark this post and the followings unread

notice!

i have just learnt that if you put switch between the 555 pin 3 and 4017 pin 13. when switch is connected - the sequence run like it should - but if you disconnect the sequence start running really fast. so there is no "stop sequence" effect Sad


uncle-krunkus you are a one crasy stripboarder.
i think stripboarding the SL is great job

daniel

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Pehr



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PostPosted: Sat Aug 20, 2005 6:27 am    Post subject: Reply with quote  Mark this post and the followings unread

How about a switch in series with the speed-pot? Confused
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mosc
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PostPosted: Sat Aug 20, 2005 9:16 am    Post subject: Reply with quote  Mark this post and the followings unread

In digital circuits, it's generally a bad idea to put switches directly in the circuit. Instead connect switches to the inputs of gates.

For example, connect a clock signal to one input of a NAND gate and hook the other input to the center tap on a switch. Also, to this input connected to the switch, connect a 100K resistor to Vcc and a 0.01 uF capacitor to ground.

Connect one of the free taps of the switch to ground and leave the other end open.

Now, when depending on where you have the switch set, the clock will be gated on or off. Of course, you can also use AND, NOR, or OR gates too.

Using gates beats direct connection of switches because of better noise immunity, and you can build control structures. For example, why not put in a control the turns the sequencer on or off depending on the level of the input to a voltage comparitor?

Gasp, I want to draw a schematic. Daniel, are you using a free schematic editor I might learn to use pretty quickly? Talking about circuits isn't the best way to communicate.

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Pehr



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PostPosted: Sat Aug 20, 2005 9:51 am    Post subject: Reply with quote  Mark this post and the followings unread

How slow is the slowest sequence rate? maybe thats enough time to set the CV for each step?
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dnny



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PostPosted: Sun Aug 21, 2005 3:27 am    Post subject: Reply with quote  Mark this post and the followings unread

mosc wrote:
Gasp, I want to draw a schematic. Daniel, are you using a free schematic editor I might learn to use pretty quickly? Talking about circuits isn't the best way to communicate.


one picture says more than 1000 words and i think one schematic says at least the same amount of words that average picture.
so it would be really nice to see more schematics here

yes i'm using it and i think its really nice - i have difficulties creating new components because i don´t know the right symbols for cmos-ic´s

maybe some one have all ready draw them to schematic editors component library .cpt-files?

i think anyone can learn it quickly - just don´t ignore the html-help (:

mocs could you mode the system so it could accept .cpt -files as attachments? normal library files are about 50Kb in size
so we could start sharing component libraries


thanks.
i must say this again and again. this forum have a special place in my heart and i think this is just one of the best places that i have found.

daniel

ps.
here is the link to free schematic editors download page

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dnny



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PostPosted: Sun Aug 21, 2005 3:51 am    Post subject: Reply with quote  Mark this post and the followings unread

Pehr wrote:
How slow is the slowest sequence rate? maybe thats enough time to set the CV for each step?


it depends on the capacitor and the pot used.
here you can see a animation of 555 timer working. this will explain a lot. (first choose the slow animation and then make it go faster)


but if you do like the schematic say: so the pot is 100K and the electrolytic capacitor is 100UF and you run it whit +9V. the slowest time is about 8 sec. that should be enough time to set the values for the steps

if you want slower or faster times experiment whit the cap and pot

daniel

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dnny



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PostPosted: Sun Aug 21, 2005 4:07 am    Post subject: pic of the Sequencer Reply with quote  Mark this post and the followings unread

this is just showing of i know. but i had the chance to use my friends photographic studio so here is a photo of my Sequencer prototype.
Posted Image, might have been reduced in size. Click Image to view fullscreen.

the leds running in the bottom row indicates the steps.
the last led on bottom row is the clock rate led and above it it the clock rate pot.
the leds on upper row are gate on indicators and the switches are for gate on/off.
reset on step switches are inside the box.
manual step fw button inside the box.

the box is old wrist watch box

sound samples are soon to come

thanks. Janne W. for the photo

dnny

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PostPosted: Sun Aug 21, 2005 4:38 am    Post subject: Reply with quote  Mark this post and the followings unread

I just added .cpt files to the list of acceptable extentions. Let me know if you have any problems.
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PostPosted: Sun Aug 21, 2005 4:59 am    Post subject: Reply with quote  Mark this post and the followings unread

Dnny, thanks for that download link for the Schematic Editor. I downloaded. It looks just great for small projects.
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PostPosted: Sun Aug 21, 2005 5:30 am    Post subject: Reply with quote  Mark this post and the followings unread

mosc wrote:
Dnny, thanks for that download link for the Schematic Editor. I downloaded. It looks just great for small projects.


I really wish I had a PC. I've emailed Ray Wilson to ask if there is a possibility of an OSX version- which there isn't, but he's willing to release the source code to anyone who wants to develop it for the Macintosh. (I wouldn't know where to start). Anybody interested?
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Macaba



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PostPosted: Sun Aug 21, 2005 7:19 am    Post subject: Reply with quote  Mark this post and the followings unread

This simple sequencer project is looking really great, I'm eager to order the parts later on today. I might just have to build a few, a couple for my diy modular synth and i might build a soundlab and sequencer into an attractive box.

Great work guys!
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dnny



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PostPosted: Sun Aug 21, 2005 12:02 pm    Post subject: Reply with quote  Mark this post and the followings unread

mosc wrote:
I just added .cpt files to the list of acceptable extentions. Let me know if you have any problems.


Embarassed oops it was .spt not .cpt - my mistake sorry

i started a new thread on free Schematic Publisher on the DIY section so i think we could continue the "Schematic Publisher"-talk there
and start sharing maybe the library files also



daniel

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dnny



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PostPosted: Sun Aug 21, 2005 2:06 pm    Post subject: Reply with quote  Mark this post and the followings unread

Macaba wrote:
I might just have to build a few, a couple for my diy modular synth and i might build a soundlab and sequencer into an attractive box.!


the idea off this simple sequencer started when i saw J.Schmitz DIY synth the Pig.

Posted Image, might have been reduced in size. Click Image to view fullscreen.

Quote:
"The Pig" is a very simple, little synth with 2 VCO's, 1 voltage controlled state var Filter, two Attack-Release Generators, VCA (of course), 2 LFO's (one of them with audio freq) and two 8-step sequencers.
The first sequencer modulates the two VCO's, the second one is for filter modulation.


after listening the sound samples i thought that i needed a sequencer maybe couple of them (:

i can´t wait to see and hear your SL and sequencer in a same box. for sure it will be something neat

daniel

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PostPosted: Sun Aug 21, 2005 3:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Hah genious he did it all on matrix board, Theres a guy who used the 4017, 4016 combination for circuitbending trigering sound chips which was quite interesting, it wouldbe interesting to see somone make a circuitbening/synth DIY hybrid you can use 4016's to make triggers for toys , i cant find the link right now though
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dnny



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PostPosted: Mon Aug 22, 2005 1:06 am    Post subject: Reply with quote  Mark this post and the followings unread

yupyupoh wrote:
4017, 4016 combination for circuitbending trigering sound chips which was quite interesting, it wouldbe interesting to see somone make a circuitbening/synth DIY hybrid you can use 4016's to make triggers for toys , i cant find the link right now though


in my prototype see photo above i use toy sound chip that makes sound of breaking glass. and whit the pots you can chance the speed of replay.

can´t wait to post the samples - soon

daniel

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PostPosted: Mon Aug 22, 2005 1:57 am    Post subject: Reply with quote  Mark this post and the followings unread

oh cool, what is it from? is it bought on its own?
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dnny



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PostPosted: Mon Aug 22, 2005 4:37 am    Post subject: Reply with quote  Mark this post and the followings unread

yupyupoh wrote:
oh cool, what is it from? is it bought on its own?


i found it from my Little sisters toy box. its insides of happymeal toy from the big and bad fast food company.

its very small like all those toy chips and it fits nicely like this
Posted Image, might have been reduced in size. Click Image to view fullscreen.

I'm still having some problems whit the sequencer i think i need to chance the 4017 - because i did heat the legs quite a lot . . .

but here is how its sounds now - not that bad (:


hope yo find the link to that page you talked about

daniel


glas.mp3
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PostPosted: Mon Aug 22, 2005 6:38 am    Post subject: Reply with quote  Mark this post and the followings unread

Hey I haven't replied to any of this yet as it seems to be beyond
the realm of my comprehension. I did want to add though, and say that this sequencer is coming along very nicely. Great proto and heres to a job well done. Thanks for your contributions dnny. Mybe when its all said and done someone will come out with a layout Rolling Eyes so the inept may enjoy the fruits of your labor.

slowly but surely learning the structure of magic

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Wild Zebra



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PostPosted: Mon Aug 22, 2005 6:42 am    Post subject: Reply with quote  Mark this post and the followings unread

Hey I haven't replied to any of this yet as it seems to be beyond
the realm of my comprehension. I did want to add though, and say that this sequencer is coming along very nicely. Great proto and heres to a job well done. Thanks for your contributions dnny. Mybe when its all said and done someone will come out with a layout Rolling Eyes so the inept may enjoy the fruits of your labor.

slowly but surely learning the structure of magic

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