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egasimus
Joined: Feb 11, 2011 Posts: 113 Location: Bulgaria
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Posted: Wed Jan 11, 2012 5:46 am Post subject:
quick and dirty kick, snare, hat? |
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I'm looking for any basic drum circuits which are to be very simple, but have a lot of character, something with gritty and distorted sounds. Maybe I should ask this in the Lunetta forum instead? |
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Dan Lavin
Joined: Nov 09, 2006 Posts: 649 Location: Spring Lake, Mi, USA
Audio files: 21
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Cynosure
Site Admin
Joined: Dec 11, 2010 Posts: 966 Location: Toronto, Ontario - Canada
Audio files: 82
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Posted: Wed Jan 11, 2012 6:40 pm Post subject:
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You might want to have a look at this thread:
http://electro-music.com/forum/topic-49054.html
Scroll down to the last posted schematic for the updated filters. I am triggering them with a steady clock pulse divided with a 4040, but you could trigger the filters with any gate/clock pulse - although you would need to adjust some of the cap values if the pulses aren't +5V. _________________ JacobWatters.com |
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egasimus
Joined: Feb 11, 2011 Posts: 113 Location: Bulgaria
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Posted: Thu Jan 12, 2012 1:02 am Post subject:
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yup, Cynosure, your thread's what inspired me to do it, and I'm gonna use the 4040 beat generator in my design; I decided to try the 606 kick schematic that has been floating around for a while, and will check the monotribe, too. Thanks |
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Cynosure
Site Admin
Joined: Dec 11, 2010 Posts: 966 Location: Toronto, Ontario - Canada
Audio files: 82
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Posted: Thu Jan 12, 2012 7:01 am Post subject:
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I'm glad to hear that people are putting my designs to use
I have most of my drum circuit soldered up - just working on the case now. I should have a video in a couple of weeks. _________________ JacobWatters.com |
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efabric
Joined: Jan 05, 2012 Posts: 19 Location: Caen, France
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egasimus
Joined: Feb 11, 2011 Posts: 113 Location: Bulgaria
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Posted: Thu Jan 12, 2012 7:55 am Post subject:
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^ hey, those look nice Gonna build myself one of those, too |
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frequencycentral
Joined: May 25, 2008 Posts: 186 Location: UK
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Posted: Thu Jan 12, 2012 5:55 pm Post subject:
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Very interesting. anyone built this as a standalone? I'm considering doing some PCB layouts..... _________________ http://www.frequencycentral.co.uk/ |
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Paradigm X
Joined: Feb 15, 2011 Posts: 363 Location: Null and void
Audio files: 2
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Posted: Thu Jan 12, 2012 8:14 pm Post subject:
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Korg prob won't be too happy as currently in production. However richard c64 posted a load of mods at the deathlehem forum check it out. If its sufficiently different ... |
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egasimus
Joined: Feb 11, 2011 Posts: 113 Location: Bulgaria
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Posted: Mon Jan 16, 2012 12:49 am Post subject:
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I perfboarded the 606 kick with a TL072 (didn't have a 358), and it didn't work. I ran it from a 9V battery (a pretty stale one, though) and tried triggered it from V+ through a 47k resistor; output plugged direct to headphones. I know that just about everything's wrong about my setup, but I didn't have the time for anything better
So, can this circuit run off 9V? And how do I trigger it? |
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inlifeindeath
Joined: Apr 02, 2010 Posts: 316 Location: Albuquerque, NM
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Posted: Mon Jan 16, 2012 11:05 am Post subject:
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TL072 doesn't swing rail to rail, seems that the bare minimum it will run on is +/-6v (12v). The LM358 is designed to run on a single supply, so should work on 9v. _________________ http://www.youtube.com/user/borisandfef |
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richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
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Posted: Mon Jan 16, 2012 12:26 pm Post subject:
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inlifeindeath wrote: | TL072 doesn't swing rail to rail, seems that the bare minimum it will run on is +/-6v (12v). The LM358 is designed to run on a single supply, so should work on 9v. |
The TL072, or most any other op amp can be made to function single-supply by biasing the + input to around half the supply voltage -- which is what the 606 circuit does.
egasimus wrote: | I perfboarded the 606 kick with a TL072 (didn't have a 358), and it didn't work. I ran it from a 9V battery (a pretty stale one, though) and tried triggered it from V+ through a 47k resistor; output plugged direct to headphones. I know that just about everything's wrong about my setup... |
masterful understatement _________________ Revenge is a dish best served with a fork... to the eye |
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egasimus
Joined: Feb 11, 2011 Posts: 113 Location: Bulgaria
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Posted: Mon Jan 16, 2012 3:50 pm Post subject:
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Quote: | masterful understatement |
Yup.
I'm using this circuit. Looking at the original 606 schematic, the supply voltages involved are 5V, 6V, and 15V. Nothing bipolar needed, it seems. What does the trigger pulse look like, though |
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richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
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Dougster
Joined: Sep 20, 2005 Posts: 272 Location: Tucson, AZ, USA
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Posted: Tue Jan 17, 2012 3:19 am Post subject:
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richardc64 wrote: | Monotripe |
I want one of those...
Regards,
Doug (Music with Menudo anyone?) _________________ Once you start down the modular path, forever will it dominate your destiny!
Every DIY person should own a copy of Electronotes: http://electronotes.netfirms.com
Blue LEDs are evil. |
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defog
Joined: Aug 24, 2011 Posts: 113 Location: Philadelphia
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Posted: Thu Jan 26, 2012 7:42 pm Post subject:
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I programmed an arduino to send midi triggers to all of the sounds on a TR-606, and it was a pain in the ass because the timings are all different. Check out Eric Archers info on triggering: http://ericarcher.net/devices/tr808-clone/ _________________ The Phoenix Vertigo is my Electronic alias. Check out my songs on soundcloud : http://soundcloud.com/charles-stieg/ |
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MickeyDelp
Joined: Feb 26, 2010 Posts: 42 Location: Austin TX
Audio files: 1
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Posted: Tue Jan 31, 2012 4:43 am Post subject:
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Egasimus, it seems like Cynosure's super-cool UM-TSS is exactly what you need given that you were looking for "something with gritty and distorted sounds."
For a less gritty sound, I love the damped sine waves that you get from the bridged-T circuit shown above in the 606 (and used in the 808 and many other drum machines). I use +/- 4.5 volts from a 9V supply. I like the TLE2426 rail splitter, but a simple resistor divider will give you a useable virtual ground. The TL072 works fine at this voltage and sounds cleaner to me than the LM358. I trigger my drums with a microcontroller, but have also generated the pulses using a CD40106 powered by +4.5V and vGnd.
If anyone is interested, I'll post a complete schematic. _________________ MickeyDelp.com
Delptronics.com |
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richardc64
Joined: Jun 01, 2006 Posts: 679 Location: NYC
Audio files: 26
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Posted: Thu Feb 02, 2012 1:16 pm Post subject:
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MickeyDelp wrote: | If anyone is interested, I'll post a complete schematic. |
Always happy to see schematics. They're like pr0n to me.
What--? _________________ Revenge is a dish best served with a fork... to the eye |
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MickeyDelp
Joined: Feb 26, 2010 Posts: 42 Location: Austin TX
Audio files: 1
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Posted: Fri Feb 03, 2012 4:52 pm Post subject:
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Happy to oblige! The bridged-t circuit needs a short (5-10 ms) pulse. This Schmitt trigger relaxation oscillator is just one of a thousand ways of producing a pulse. The output is a pulse because the diode shorts out the resistor on the discharge cycle of the oscillator.
So, as you can see and hear, it works fine on +/- 4.5 volts and a simple resistor divider provides a good enough virtual ground. If you are going to be powering more chips, then you might need a more stable vground. This is one of the best writeups I have read on virtual grounds.
Usual caveats: Uncommitted CMOS inputs should be tied to ground or V+ and uncommitted op amps should have positive input connected to ground and negative input connected to output.
Description: |
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This image has been reduced to fit the page. Click on it to enlarge. |
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On the breadboard and through the amp! |
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SimpleDrum.MOV |
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_________________ MickeyDelp.com
Delptronics.com |
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Cynosure
Site Admin
Joined: Dec 11, 2010 Posts: 966 Location: Toronto, Ontario - Canada
Audio files: 82
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Posted: Fri Feb 03, 2012 8:06 pm Post subject:
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You got a youtube channel to post the vid? Full res hd doesn't run too well (especially when I have ableton, winamp and oscilloscope running the the background). _________________ JacobWatters.com |
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MickeyDelp
Joined: Feb 26, 2010 Posts: 42 Location: Austin TX
Audio files: 1
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Posted: Fri Feb 03, 2012 8:56 pm Post subject:
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Sure. Here it is.
Also, forgot to show the output on the schematic. Probably obvious, but it is at the output of the op amp, through a 1uF cap. _________________ MickeyDelp.com
Delptronics.com |
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beep
Joined: May 05, 2013 Posts: 105 Location: Germany
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Posted: Tue May 07, 2013 7:07 am Post subject:
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40106 does not work when I connect it'S ground to the virtual ground.
please help |
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elmegil
Joined: Mar 20, 2012 Posts: 2177 Location: Chicago
Audio files: 16
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Posted: Tue May 07, 2013 9:55 am Post subject:
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Do you have more than one chip so you can test another and be sure it's not a bad chip?
Other than that I think you need to explain what you've done and tested so far to get a better idea how to help. |
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beep
Joined: May 05, 2013 Posts: 105 Location: Germany
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Posted: Tue May 07, 2013 5:49 pm Post subject:
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First of all Thank you for sharing this schematic!
People like you are giving a big gift to people like me.
True analog drums... *__* <3 :DDD
back to troubleshooting...
It's weird. The chip was okay. It's a HEF40106, not a cc40106.
Got it working after some changes.
The ground of the audio output jack or plug has to be the virtual ground, not the ground of the power supply, which is -4,5v in this case.
Then the trigger oscillator cap on the 40106 input had to be connected to the
real ground (-4,5v) to make the circuit work correctly. I also had to remove the two 1k-resistors at the connection between the trigger pulse output and
the resonance filter input.
is the cc40106 different from the HEF40206?
On breadboard, the 40106 always causes lots of humming noise.
soldered it on stripboard, no noise. Weird. Is a breadboard generally
known for catching more electric noise?? |
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elmegil
Joined: Mar 20, 2012 Posts: 2177 Location: Chicago
Audio files: 16
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Posted: Tue May 07, 2013 6:52 pm Post subject:
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Breadboards have lots of stray capacitance.
The output ground thing makes sense to me.
Would the 1K's work if the second one connected to the 'real ground' like the cap? I would think that might be an important factor. |
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