Yeah, FPGAs sound like they'd be pretty cool. But they're a bit to rational for me!!
"Having fun is half of the insanity!!"
or was that,
"Going insane is half the fun!!"? _________________ What makes a space ours, is what we put there, and what we do there.
How about this one?
Can you connect the output of a binary counter or 4017 to two, three or four AND gate inputs. (I'm pretty sure the answer is yes, I'm just checking)
Yes, of course you can! What was I thinking?
How about eight? _________________ What makes a space ours, is what we put there, and what we do there.
You should check the data sheets for minimal output and maxiimal input current, but with CMOS the number of inputs that you can connect to an output should be virtual limitless.
For old style TTL outputs would have a fan-out specified and likewise inputs would have a fan-in, adding up the fan-in's should not exceed the fan-out then. But I can't remember ever having to worry about this for CMOS.
Well I fired up the first prototype of the Monscitor this arvo. Have a listen to the mp3. This is just the output of it running by itself at one fundamental frequency.
If you have a look at the waveshape, you'll see (and hear) that the transition from one wave to the next is quite sharp. I know that because I used dual up counters there will be a jolt when the byte goes back to 0000, but I think it's worse than it should be. Hopefully this is because I've transposed the bit lines somehow. I'm going to investigate that later tonight. I think it's a promising start though.
I'm thinking of using it as a sub oscillator in a synth, as it basically takes a square wave in and spits out a constantly morphing squarewave conglomeration which is always 3 octaves below (also sometimes containing 1&2 octaves below)
Bub is being induced in the morning. So I better get some sleep.
Monscitor 1.mp3
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_________________ What makes a space ours, is what we put there, and what we do there.
It turns out that I had the bit lines connected completely backwards! I fixed it, and it already sounds heaps better!
Hanna Ruby Sharp was born at 7:45 AEST this morning. 3.8kg Mum and bub doing well. Father very proud of all involved. _________________ What makes a space ours, is what we put there, and what we do there.
Here's the latest pic and wave of the super-sub. It's still not as I want it to be, and it does use an awful lot of chips for what it does, but it already has good WSB potential.
Hey Jan, I've noticed the spikey wave form is back (have a look at the mp3 in Soundforge etc.) and I was wondering if, now that I have, 556 clocks feeding 4520 counters which are ANDed with the 4017 outputs via 4081s and sent to the 4066 inputs, should I have pull down resistors anywhere else?
Fixing the bit lines has decreased the amount of sudden steps in the wave, but it does mean that the steps which do occur are as bad as they can be (ie 1111 -> 0000) I've worked out a way that you could drop back to 3bit and use the fourth as an auto reverse bit (XORs) but adding anymore chips would just be getting to silly! Wouldn't it?
Could I run the 4017 straight off a square wave out of the SoundLab? It's musicality would immediately go up a few notches if could just patch it in as a sub oscillator. That's why I decided to call it a Super-Sub.
One of it's features/annoyances is the sudden shifts in amplitude. This could maybe be tamed with a little compressor like Scott has been experimenting with lately. Yet the shifts in harmonic content are the whole point, so maybe that's just part of the uncontrolled modulation effect.
The next thing will be to make each sample's mod clock internal/stopped/external. And I've thought of a rotary switch for each sample so you can dial up different mod clocks to each sample. External mod clock /2,3,4......10 is another possibility.
Anybody who has any ideas about how to improve this thing feel free to throw them around!
Is there anyone willing to help me do a schem of it using Ray's schem publisher? I'm still finding it hard to use.
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This image has been reduced to fit the page. Click on it to enlarge.
_________________ What makes a space ours, is what we put there, and what we do there.
Hey Jan, I've noticed the spikey wave form is back (have a look at the mp3 in Soundforge etc.) and I was wondering if, now that I have, 556 clocks feeding 4520 counters which are ANDed with the 4017 outputs via 4081s and sent to the 4066 inputs, should I have pull down resistors anywhere else?
You lost me
I did read your request for help on drawing up the schematics, so I wont expect too much, but could you maybe give some scetch as what it is like now ?
The sound example is almost like there is mains hum in it ? Also there is not only the peaks, but I don't get the arcs in the waves either.
Nice pic you posted elswhere btw, the bathing one I mean.
On the original the 4017 was feeding the 4066 directly, yet you suggested pull down resistors, and they helped stabilise it heaps. Now there are a number of gates in between those stages, and I wondered whether I need pull downs between any of them.
When the output of any of the gates isn't high it is definately low (ie: there aren't any "floaters") but that was the case with the 4017->4066 and the resistors helped pulled them down quicker.
Maybe once I get a rough schem to you, you'll start to see where it could be better. I'll have a go at that next. _________________ What makes a space ours, is what we put there, and what we do there.
I've got some customers at work wanting to have it done yesterday with specifications impossible to implement and third parties being involved refusing to do a thing.
Oh it might take a while!
Ray's schem publisher is driving me crazy! I must be missing something for it to be so hard to use. _________________ What makes a space ours, is what we put there, and what we do there.
Hey Dnny,
Can you make the page any bigger? It seems I get a few components on there, and it's full. How did Ray ever fit all the components for his Soundlab schems? _________________ What makes a space ours, is what we put there, and what we do there.
Sorry, couldn't stand trying to do this one in SP, so I drew it in photoshop! This is 1/8th of the mod section. I've got four of these on each mod board. Very simple.
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_________________ What makes a space ours, is what we put there, and what we do there.
Joined: Dec 10, 2005 Posts: 766 Location: oakland, ca
G2 patch files: 1
Posted: Wed Apr 26, 2006 3:25 pm Post subject:
i didna like that schematic publisher software much. i use "circuit maker 2000" for drawing them. much easier. it is also a simulation, and has a pcb design thing too. if anyone wants it, lemme know, 'PM' me, also, i have "electronics workbench". i will post a screen shot of it here also so youall can see.
i am moving right now, trying to finish some things up, but, in the future, if anyone needs a hand with drawing a schematic or designing a PCB, let me know! i'm glad to help- if it's elaborate, [especially a PCB] perhaps we could work out a trade for something. cool then.
Joined: Mar 12, 2005 Posts: 519 Location: Helsinki, Finland
Audio files: 8
Posted: Wed Apr 26, 2006 10:49 pm Post subject:
Uncle Krunkus wrote:
Hey Dnny,
Can you make the page any bigger? It seems I get a few components on there, and it's full. How did Ray ever fit all the components for his Soundlab schems?
you can adjust the page size :
Use "Print Setup..." to select paper sizes other than 8.5" x 11." The virtual drawing page will assume the dimensions and orientation of the selected paper.
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