| Would you prefer one PCB with 3 VCOs a la JH-5A, or 1 VCO per PCB with more features |
| One PCB with Oscillator Driver and 3 VCO cores (like JH-5A - cheap!) |
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60% |
[ 62 ] |
| 1 PCB = 1 VCO (with many waveforms and inputs) |
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39% |
[ 41 ] |
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| Total Votes : 103 |
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TekniK
Joined: Aug 10, 2008
Posts: 1059
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 Posted: Tue May 19, 2009 11:33 pm Post subject:
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| you should have linked all psu for each section onboard Juergen with the option to cut the traces for those who like use seperate connectors...or implement jumper wires but the again it add a lot of solder points |
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numbertalk
Joined: May 05, 2008
Posts: 992
Location: Austin, TX
Audio files: 5
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| Posted: Wed May 20, 2009 7:04 am Post subject:
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Since those extra power pads are there, I'll probably use the solution JH suggests (I'll be using a MOTM header so I'll use the dotcom pads on the driver to start the chain), but I have a couple other projects that are going to include daughterboards and those boards don't have an extra set of power pads like this board conveniently does, so this seems like a very attractive solution for situations like that.
So Dave, do you solder both wires into each slot of each header (except for the last one in the chain obviously)? Though looking again it seems you solder 3 sets of wires even into one of the headers.
Actually just found this on your site, which seems to answer my question:
I press the wires in and solder them to the connectors. You can piggyback another wire on top and solder it to the feed-thru wire. It is tight but manageable.
Thanks for all the info! |
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wicked1
Joined: Apr 24, 2009
Posts: 14
Location: stl
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| Posted: Wed May 20, 2009 7:33 am Post subject:
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Anyone thought about adding a saw to tri/sine converter?
I was looking at Bergfotrons. http://hem.bredband.net/bersyn/VCO/Saw%20to%20tri-sin%20W.gif
Would I connect it to the 0-10v saw output (as mentioned on JH's vco page)? Then I see there's an offset adjust on the saw-tri converter, and I guess that would bring it down to -5/+5?
thanks! I'm planning my panel, and trying to think about how many +/-5v waves I'll be able to bring to the panel, or if I'll need a switch to send them all to the amp, and then a single output. |
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numbertalk
Joined: May 05, 2008
Posts: 992
Location: Austin, TX
Audio files: 5
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| Posted: Wed May 20, 2009 7:43 am Post subject:
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I added this circuit to the Arp Odyssey VCOs I built and I believe I had to offset the waveform first. I believe you could just put a cap at the input to the converter circuit though.
| wicked1 wrote: | Anyone thought about adding a saw to tri/sine converter?
I was looking at Bergfotrons. http://hem.bredband.net/bersyn/VCO/Saw%20to%20tri-sin%20W.gif
Would I connect it to the 0-10v saw output (as mentioned on JH's vco page)? Then I see there's an offset adjust on the saw-tri converter, and I guess that would bring it down to -5/+5?
thanks! I'm planning my panel, and trying to think about how many +/-5v waves I'll be able to bring to the panel, or if I'll need a switch to send them all to the amp, and then a single output. |
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2thick4uni
Joined: Feb 20, 2009
Posts: 113
Location: UK
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davebr
Joined: Jun 09, 2007
Posts: 198
Location: portland, or
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| Posted: Wed May 20, 2009 5:12 pm Post subject:
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| numbertalk wrote: | | So Dave, do you solder both wires into each slot of each header (except for the last one in the chain obviously)? Though looking again it seems you solder 3 sets of wires even into one of the headers. |
I carefully strip the wire from the first connector in the chain (towards the middle of the cable, not at the end of the cable). You only need to displace the insulation about 1/8". I tin it, then press it into the connector. I use these daisy chain power cables for daughterboards. They work well. I make them so the wire is one continuous piece from end to end.
If I need a "Y" (as I did on this module) then I add a second wire on top. Yes, it is three wire segments, but only two wires.
Dave |
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numbertalk
Joined: May 05, 2008
Posts: 992
Location: Austin, TX
Audio files: 5
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| Posted: Sat May 23, 2009 12:09 pm Post subject:
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Very good to know - will definitely come in handy. Thanks!!
| davebr wrote: | | numbertalk wrote: | | So Dave, do you solder both wires into each slot of each header (except for the last one in the chain obviously)? Though looking again it seems you solder 3 sets of wires even into one of the headers. |
I carefully strip the wire from the first connector in the chain (towards the middle of the cable, not at the end of the cable). You only need to displace the insulation about 1/8". I tin it, then press it into the connector. I use these daisy chain power cables for daughterboards. They work well. I make them so the wire is one continuous piece from end to end.
If I need a "Y" (as I did on this module) then I add a second wire on top. Yes, it is three wire segments, but only two wires.
Dave |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Tue May 26, 2009 11:23 am Post subject:
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I put my first prototype up on ebay:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=160337912688
This may be interesting for those who aren't into soldering that much.
You still need all the off-board components (potentiometrs, switches, jacks
etc.), though.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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TekniK
Joined: Aug 10, 2008
Posts: 1059
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| Posted: Tue May 26, 2009 1:04 pm Post subject:
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The bidder is your friend or he is stupid?(no offence)
if hes not both of one mentioned u should stop sell kits NOW and only sell fully populated boards on ebay  |
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Funky40
Joined: Sep 24, 2005
Posts: 875
Location: Swiss
Audio files: 1
G2 patch files: 5
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| Posted: Tue May 26, 2009 3:02 pm Post subject:
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| TekniK wrote: | | The bidder is ........ |
wow, allready sold 
populating the boards was easy, wiring the Module will be tough.
a friend told me that this one makes very nice sinewaves.
I go for the Bergfotron myself i think , but only for one of the three VCOs.
I'm also interested to know about the connections to be made |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Tue May 26, 2009 10:57 pm Post subject:
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| Funky40 wrote: |
wow, allready sold
populating the boards was easy, wiring the Module will be tough.
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Depends on what configuration you want.
I have quite a small number of potentiometers in the VCO section of my JH-5A (http://www.jhaible.de/jh5/jh5_total_large.jpg): Pulse Width shared between 3 VCOs, no CV input attenuators etc., and for for what I'm mostly doing with it (bass and lead sounds), it's more than enough.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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bleekza
Joined: May 11, 2009
Posts: 23
Location: Virginia USA
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Posted: Wed Jun 03, 2009 7:54 pm Post subject:
Re: Living VCOs
Subject description: Front Panel Designs |
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| unit-sound wrote: | | Anybody worked on a 5U version with the verniers ? |
I second that, I want my verniers!
Where are the 5U panels for this thing? |
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sduck
Joined: Dec 16, 2007
Posts: 459
Location: Nashville
Audio files: 5
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Posted: Wed Jun 03, 2009 8:16 pm Post subject:
Re: Living VCOs
Subject description: Front Panel Designs |
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| bbow73 wrote: | | unit-sound wrote: | | Anybody worked on a 5U version with the verniers ? |
I second that, I want my verniers!
Where are the 5U panels for this thing? |
Go get Dave Brown's various versions. Links on the previous page in this thread. Then go get Front Panel Designer from http://www.frontpanelexpress.com/ Then you can use Scale-a-matic (http://stiftsbogtrykkeriet.dk/~mcs/Scale.html) to make some nice looking tick marks for the vernier dials, then mod Dave's design to your taste. The best looking panels are the ones you design yourself! |
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bleekza
Joined: May 11, 2009
Posts: 23
Location: Virginia USA
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| Posted: Thu Jun 04, 2009 4:13 am Post subject:
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excellent excellent links!!!
thank you so much for posting that!
You don't know how long I've been looking for something like this.
Now the only trick is coaxing a cool layout from my own creativity.  |
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dingebre
Joined: Aug 10, 2008
Posts: 270
Location: Salt Lake City, UT USA
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| Posted: Fri Jun 05, 2009 12:02 pm Post subject:
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OK, so while every teacher says, "There are no stupid questions," I think there are and I do my best to ask each one of them. So, in that light:
I am not understanding the connection between the "Driver" and the three VCO sections. How would one typically connect it all together?
I'm trying to put a panel together and would like to "normal" some typical connections to avoid switches.
David
_________________
David M. Ingebretsen, M.S., M.E.
Collision Forensics & Enginering, Inc.
dingebre@3dphysics.net
http://www.xmission.com/~dingebre/Synthasystem.html |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Fri Jun 05, 2009 1:28 pm Post subject:
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| dingebre wrote: | OK, so while every teacher says, "There are no stupid questions," I think there are and I do my best to ask each one of them. So, in that light:
I am not understanding the connection between the "Driver" and the three VCO sections. How would one typically connect it all together?
I'm trying to put a panel together and would like to "normal" some typical connections to avoid switches.
David |
Use normalized jacks for the CV inputs of each VCO. But instead of normalizing to GND, normalize them (all 3 of them) to the output of the Oscillator Driver.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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dingebre
Joined: Aug 10, 2008
Posts: 270
Location: Salt Lake City, UT USA
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| Posted: Fri Jun 05, 2009 3:34 pm Post subject:
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So, controller (keyboard, sequencer) CV into the driver. Driver out into each VCO I want to control. The drive provides portamento, etc. to the CV and drives the VCO's.
Output of each VCO into a mixer, or filter or where ever I want it to go from there.
Thanks again.
_________________
David M. Ingebretsen, M.S., M.E.
Collision Forensics & Enginering, Inc.
dingebre@3dphysics.net
http://www.xmission.com/~dingebre/Synthasystem.html |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Fri Jun 05, 2009 10:58 pm Post subject:
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| dingebre wrote: | So, controller (keyboard, sequencer) CV into the driver. Driver out into each VCO I want to control. The drive provides portamento, etc. to the CV and drives the VCO's.
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Yes.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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dingebre
Joined: Aug 10, 2008
Posts: 270
Location: Salt Lake City, UT USA
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon Jun 15, 2009 11:41 pm Post subject:
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| dingebre wrote: | What is the power requirement for the Living VCO?
David |
I haven't made precise measurements 
Nothing outrageous, for certain.
Last time I had it on the Lab power supply, the meters were about 90mA.
So make that 100mA * 2 * 15V = 3 Watts. (for the whole PCB)
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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dingebre
Joined: Aug 10, 2008
Posts: 270
Location: Salt Lake City, UT USA
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| Posted: Tue Jun 16, 2009 12:39 am Post subject:
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Thank you JH.
I'm putting two of these into a rack with a 0.5 amp power supply and wanted to make sure I wasn't overdoing anything. Looks like I'm good to go.
David
_________________
David M. Ingebretsen, M.S., M.E.
Collision Forensics & Enginering, Inc.
dingebre@3dphysics.net
http://www.xmission.com/~dingebre/Synthasystem.html |
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intercorni
Joined: Jun 04, 2007
Posts: 69
Location: hamburg
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Posted: Thu Jul 02, 2009 6:52 am Post subject:
Tempco
Subject description: These types can I use? |
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These Tempco types can I use?
http://de.farnell.com/tyco-electronics/lt300014t261k0j/widerstand-temperature-sensing/dp/1174306
Detail:
* WIDERSTAND, TEMPERATURE SENSING, 1K
* Serie:LT
* Widerstand:1kohm
* Tolerance, Resistance:± 5%
* Temperatur, Betriebs- max.:+125°C
* Gehäusetyp:Axial
* Durchmesser, Gehäuse:2.3mm
* Länge, Anschluß:30mm
* Länge/Höhe, Außen-:6.5mm
* Temperaturkoeffizient, +:3000ppm/°C
* Toleranz, Temp.-Koeff., +:10%
* Toleranz, Temp.-Koeff., -:10%
* Widerstand, Isolations-:10Gohm
* Zeit, Ansprech:7.5s
* Nennleistung:0.25W
* Stabilität, Volllastlebensdauer +:1000 hours@125/C, 0.5
* Temperatur Arbeitsbereich:-40°C bis +125°C
* Temperatur, Betriebs- min.:-40°C
* Toleranz +:5%
* Toleranz -:5%
* Verhältnis, Widerstand +:1.37%
* Verlustkonstante:9mW/°C
* Widerstandselementtyp:Temperature Sensing |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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Posted: Thu Jul 02, 2009 7:48 am Post subject:
Re: Tempco
Subject description: These types can I use? |
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| intercorni wrote: | These Tempco types can I use?
* Temperaturkoeffizient, +:3000ppm/°C
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Looks good!
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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Photon
Joined: Mar 22, 2005
Posts: 363
Location: Boston
Audio files: 1
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| Posted: Sat Jul 25, 2009 1:40 pm Post subject:
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JH Living VCOs in Fractional format.
thank you, Jürgen.  |
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Sine
Joined: Sep 10, 2007
Posts: 111
Location: Netherlands
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| Posted: Sat Jul 25, 2009 2:54 pm Post subject:
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Oeh, very very nice
I love those big multiturns !
I really have to finish mine, the boards are done so now there is just the mechanical work left to do.
-edit-
Can we see the backside  |
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