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Skrog Productions
Joined: Jan 07, 2009 Posts: 1196 Location: Scottish Borders
Audio files: 155
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Posted: Fri Mar 01, 2013 6:18 am Post subject:
clock x 2 Subject description: is there a simple circuit ? |
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Hi .
I'm using a newly built diy sequencer, who's vari-step length feature halfs the incoming external clock speed .
Is there a simple way to double the incoming clock frequency so that the new sequencer is in time with my other sequencers ?.
I had a breif discussion, a while ago with Woody in chatroom, but i've forgotten what he said
Thanks for any help.
Dave. |
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analog_backlash
Joined: Sep 04, 2012 Posts: 393 Location: Aldershot, UK
Audio files: 21
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Posted: Fri Mar 01, 2013 6:36 am Post subject:
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Hi,
I've tried this simple 4011 circuit which can double clock speeds:
http://www.hqew.net/circuit-diagram/Frequency-Doubler-with-4011_4669.html
You will need to experiment with the R and C values to get the circuit to work over the range of frequencies that you require.
There are also quite a lot of 4089 circuits that I've seen (some on this web site) which are frequency multipliers, but I haven't tried those out yet (I keep meaning to buy some).
Gary |
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JovianPyx
Joined: Nov 20, 2007 Posts: 1988 Location: West Red Spot, Jupiter
Audio files: 224
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Posted: Fri Mar 01, 2013 10:09 am Post subject:
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A 4046 with a toggle flipflop in the feedback loop will double the frequency. _________________ FPGA, dsPIC and Fatman Synth Stuff
Time flies like a banana. Fruit flies when you're having fun. BTW, Do these genes make my ass look fat? corruptio optimi pessima
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analog_backlash
Joined: Sep 04, 2012 Posts: 393 Location: Aldershot, UK
Audio files: 21
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Posted: Fri Mar 01, 2013 1:53 pm Post subject:
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Hi JovianPyx.
I've just found your previous discussion on using a 4046 for this:
http://electro-music.com/forum/post-360695.html
I'll have to give this a go myself, as I also wanted a frequency doubler (and I do have some 4046s).
Thanks,
Gary |
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JovianPyx
Joined: Nov 20, 2007 Posts: 1988 Location: West Red Spot, Jupiter
Audio files: 224
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Posted: Fri Mar 01, 2013 6:30 pm Post subject:
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oh have fun with a 4046.
It's cool to use it as an oscillator, cuz there's one in there, but it's even cooler (IMO) to use it as a phase locked loop. _________________ FPGA, dsPIC and Fatman Synth Stuff
Time flies like a banana. Fruit flies when you're having fun. BTW, Do these genes make my ass look fat? corruptio optimi pessima
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Skrog Productions
Joined: Jan 07, 2009 Posts: 1196 Location: Scottish Borders
Audio files: 155
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Posted: Wed Mar 06, 2013 10:52 am Post subject:
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Thanks Gary & Scott , i will have a go this weekend at bread boarding these .
My Yamaha RM1X usually runs the sequencers ( via midi to Gate/trig) , the tempo per song usually varies from 90 BPM to around 170 BPM and i have 16 pulses per pattern measure clocking the diy sequencers.
Would that equate to around 0.5Hz to 4Hz clock frequency ?
Using the above speeds , how would i choose a low frequency operating setting on the freq doubler circuits that were kindly posted above .
thanks
Dave. |
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varice
Joined: Dec 29, 2004 Posts: 961 Location: Northeastern shore of Toledo Bend
Audio files: 29
G2 patch files: 54
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Posted: Wed Mar 06, 2013 12:01 pm Post subject:
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Skrog Productions wrote: | ...My Yamaha RM1X usually runs the sequencers ( via midi to Gate/trig) , the tempo per song usually varies from 90 BPM to around 170 BPM and i have 16 pulses per pattern measure clocking the diy sequencers... |
Wouldn’t it be much simpler and more accurate to just double the clock pulse in the RM1X to drive the vari-step sequencer and then use a simple clock divide by 2 logic to drive the others?
Or maybe use an additional MIDI to gate/trig with the RM1X driving it at 32 pulses per measure? _________________ varice |
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bubzy
Joined: Oct 27, 2010 Posts: 594 Location: United Kingdom
Audio files: 64
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Posted: Thu Mar 07, 2013 4:04 am Post subject:
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varice wrote: | Skrog Productions wrote: | ...My Yamaha RM1X usually runs the sequencers ( via midi to Gate/trig) , the tempo per song usually varies from 90 BPM to around 170 BPM and i have 16 pulses per pattern measure clocking the diy sequencers... |
Wouldn’t it be much simpler and more accurate to just double the clock pulse in the RM1X to drive the vari-step sequencer and then use a simple clock divide by 2 logic to drive the others?
Or maybe use an additional MIDI to gate/trig with the RM1X driving it at 32 pulses per measure? |
if his clock goes up to 2x the speed he wants.
and it would be simpler if he could, but not as much fun. _________________ _Richard_ |
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Skrog Productions
Joined: Jan 07, 2009 Posts: 1196 Location: Scottish Borders
Audio files: 155
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Posted: Fri Mar 08, 2013 9:48 am Post subject:
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yes i can programme 32 pulses per pattern measure
In step record mode i can get 32 , i'm so used to working with the normal 16 note "Grid" layout i forgot i can double the RM1X clock pattern in step mode.
Thanks for the help anyway.
Dave. |
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