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RF
Joined: Mar 23, 2007 Posts: 1502 Location: Northern Minnesota, USA
Audio files: 28
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Posted: Thu Mar 11, 2010 4:32 pm Post subject:
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droffset wrote: | ... I like the idea of 4017 based dividers that give really nice synchronous /2 /3 /4 /5 etc divisions ... |
Yes! These are really useful!
The document is coming along nicely, Dr.!
bruce _________________ www.sdiy.org/rfeng
"I want to make these sounds that go wooo-wooo-ah-woo-woo.”
(Herb Deutsch to Bob Moog ~1963) |
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24079 Location: The Netherlands, Enschede
Audio files: 278
G2 patch files: 320
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Posted: Thu Mar 11, 2010 4:43 pm Post subject:
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RF wrote: | The document is coming along nicely, Dr.! |
I agree! _________________ Jan
also .. could someone please turn down the thermostat a bit.
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electri-fire
Joined: Jul 26, 2006 Posts: 536 Location: Dordrecht NL
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Posted: Fri Mar 12, 2010 5:55 pm Post subject:
Subject description: divide timing in lunettas |
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I've used a 4017 counter, indeed hardwired to 8 steps. The 4040 is nice and does many even divisions (divide by 2, 4, 8, 16 etc) you might want.
It's the odd divisions that are not so easy to come by. Well, there's divide by "n" counters (wich I don't have) and may be not as straightforward to use.
I want to come up with a fairly small and versatile portable setup, so I'm reducing the amount of in/outs for each CMOS chip.
At any rate (well known lunetta builder speak, hehe, hi Rych), my next version 4017 will have just a clock in, a DPDT switch to select two different reset points and simultaneously send the right step pin to the output banana.
I can have two of those and still use less panelspace than my current 4017 that has 8 outs.
Also a much simpler build (aargh, all those wires) and for cheaper as well, considering the cost of multi rotary switches if you'd want adjustable reset.
I haven't built it yet, but should work. If you want to see how I planned this, I posted a little layout at the Lunetta designs thread. |
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MirlitronOne
Joined: Nov 07, 2009 Posts: 78 Location: Surrey, UK
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Posted: Thu Apr 08, 2010 5:10 pm Post subject:
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Nice set of articles Doc, but for the sake of the beginner could you please change the reference to the "7085 voltage regulator" to the correct "7805"?
_________________ Life is like an analogue sequencer. Twiddle the knobs to avoid boredom. |
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droffset
Joined: Feb 02, 2009 Posts: 515 Location: London area
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mosc
Site Admin
Joined: Jan 31, 2003 Posts: 18197 Location: Durham, NC
Audio files: 212
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Posted: Thu Apr 08, 2010 9:51 pm Post subject:
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Droffset, I apologize for not commenting on your excellent introduction doc before now. Somehow I missed this topic until now.
It's a great read. Very useful. Thanks for sharing.
I have a comment but I need to get my thoughts together first. _________________ --Howard
my music and other stuff |
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droffset
Joined: Feb 02, 2009 Posts: 515 Location: London area
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slugger
Joined: Feb 11, 2010 Posts: 42 Location: up on Cripple Creek (CO)
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Posted: Fri Apr 09, 2010 6:35 pm Post subject:
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Nice, thanks for this, droffset! Very handy. _________________ the synthgeek pages - samples & stuff
my blog |
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tjookum
Joined: May 25, 2010 Posts: 360 Location: Netherlands
Audio files: 26
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Posted: Sat Jun 05, 2010 2:59 am Post subject:
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hi droffset,
great document, it really helps having a lot of clear info in one place.
Ive been searching the forum for this, but I can't seem to get a definitive answer about power supply's. You say use the 7805 and run it at 5v, but ive seen anything form +/- 9v to +15v. Since the different power supply's dictate different parts it would be nice to have a clear list on what the pro's and con's are. _________________ There he goes. One of God's own prototypes. A high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die.
Hunter S. Thompson
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RF
Joined: Mar 23, 2007 Posts: 1502 Location: Northern Minnesota, USA
Audio files: 28
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Posted: Sat Jun 05, 2010 6:26 am Post subject:
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tjookum -
my 2 cents -
The CMOS does fine at 5 volts - if you are going to stay all CMOS that would be fine.. 9 is handy if you want to power it from batteries... and a bi-polar supply with 9 volt batteries is easy...
I've used 12 quite a bit - either cause I had the regulators, or because I wanted a + and - 12 volt supply to use with bipolar circuits in the Lunetta. My other equipment used + and - 12 as well. I have not seen any advantage to 15 volts...
Your mileage may vary...
have fun
bruce _________________ www.sdiy.org/rfeng
"I want to make these sounds that go wooo-wooo-ah-woo-woo.”
(Herb Deutsch to Bob Moog ~1963) |
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droffset
Joined: Feb 02, 2009 Posts: 515 Location: London area
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Posted: Sat Jun 05, 2010 6:01 pm Post subject:
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What Bruce said.
One thing more, a lot of the drum modules I'm looking at work with +-15volts, so that's the kind of power supply I have for that stuff. My Lunetta (which all runs on 5v, sends triggers and gates to the bigger system and it all seems to play nicely, as long as the grounds are connected. ) _________________ ==================
Check out the FREE Intro to Lunettas Document
https://docs.google.com/document/d/1V9qerry_PsXTZqt_UDx7C-wcuMe_6_gyy6M_MyAgQoA/edit?usp=sharing
Edit: Spelling mistakes. |
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Rykhaard
Joined: Sep 02, 2007 Posts: 1290 Location: Canada
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Posted: Sat Jun 05, 2010 10:03 pm Post subject:
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droffset wrote: | What Bruce said.
One thing more, a lot of the drum modules I'm looking at work with +-15volts, so that's the kind of power supply I have for that stuff. My Lunetta (which all runs on 5v, sends triggers and gates to the bigger system and it all seems to play nicely, as long as the grounds are connected. ) |
In my first modular building days in about '92, I went with +/-9V. Coming to wishing for a far more stable power source, I moved to a well regulated Power One +/-15V 1.5 amp supply.
For my noise machine that I started building a year ago February, I started with +/- 9V. Within a month, I tried everything in it, with my +/- 15V supply and it all worked just the same - just with higher otuput voltages. (But it will all still work with +/- 9V as well. And the -9V is only needed in the very few places that have bipolar opamps. The rest runs on the +9.
When I start building things with my PICs, they and everything connected to them will be strictly +5V. |
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tjookum
Joined: May 25, 2010 Posts: 360 Location: Netherlands
Audio files: 26
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Posted: Sun Jun 06, 2010 4:18 am Post subject:
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thanks!
Im currently just testing stuff, so for now a 9v battery works perfect. I think im going to stick with 5v for the actual modular though, I have an arduino laying around here somewhere wich I want to use later on. _________________ There he goes. One of God's own prototypes. A high-powered mutant of some kind never even considered for mass production. Too weird to live, and too rare to die.
Hunter S. Thompson
movies
noise |
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telstarmagikistferrari
Joined: Jun 16, 2008 Posts: 280 Location: Indianapolis, Indiana
Audio files: 43
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Posted: Mon Apr 18, 2022 2:02 pm Post subject:
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Anybody have access to the Intro to Lunetta document? I need it! |
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droffset
Joined: Feb 02, 2009 Posts: 515 Location: London area
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telstarmagikistferrari
Joined: Jun 16, 2008 Posts: 280 Location: Indianapolis, Indiana
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Posted: Wed Apr 27, 2022 7:33 am Post subject:
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Thanks a lot! I'm revisiting building up a Lunetta system. Will post progress here! |
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