[IN STOCK] Manual Voltage Processor - 16hp of Euro utility

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negativspace
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[IN STOCK] Manual Voltage Processor - 16hp of Euro utility

Post by negativspace » Sat Dec 08, 2012 11:05 pm

So I was tinkering around with the addon board I did for RSFC's Buchla CVP panel last night, and I ended up turning it into this thing (along with another TL074 on perfboard for the LED drivers and the 2nd buffered mult.) The panel packs three attenuverter/offset generators with LEDs, a mixer that can be a 4->1 or two 2->1s, two 1->2 buffered multiples and two 4-way passive multiples into 16hp. Right now the circuitry is a bit cobbled together but I'll make a proper PCB if this goes anywhere.

Image Image

INFORMATION ON PCB ERROR:

Details are posted on page 9 of this thread; the short version is this: two 22pF capacitors may need to be added to the back of one of the opamps in the mixer section as shown. Depending on which opamp chips you choose for your build this may not be necessary but I highly recommend it nonetheless. It costs $0.20 and takes about 40 seconds. 8_)

Image
Last edited by negativspace on Thu Jun 13, 2013 5:19 pm, edited 7 times in total.

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negativspace
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Post by negativspace » Sat Dec 08, 2012 11:06 pm

The panels are Metalphoto and the PCB sets are silk-screened and masked, double-sided and lead-free. A set (1 panel + 2 PCBs & mounting hardware) will be $40. Shipping is $5 for domestic orders of any size, $12 internationally. The PayPal address for payment is jcoates42@gmail.com.

The ordering period is over, but I have spares so if you missed out simply drop me a PM. Thanks as always, wigglers!

BOM

Resistors:
[23] 47k
[4] 470R
[2] 39k
[3] 4.7k ("4" on control board)
[3] 680R ("6" on control board)

Capacitors:
[2] 10/22/47uF electrolytic
[5] 0.1uF ceramic
[1] 4.7 electrolytic
[2] 22pF ceramic; see first post.

Pots:
[7] 50k linear, 9mm Alpha or similar
[2] 20-25k multiturn trimpot

ICs:
[1] LM78L05
[1] TL074
[1] TL072 (atten)
[1] LT1013 (mults) - can use TL072
[2] LME49720 (mixer) - can use TL072
[2] TL062 SOIC (on control board)

Misc:
[3] 2-lead bicolor LED (control board)
[2] 12-pin .100 headers, male/female pair
[1] 10-pin .100 header, male (Euro power)
[2] Ferrite bead (can use 10R resistor)
[2] PTC resettable fuse (.100 hold, .200 trip)
[2] 1N4001
[26] 3.5mm jack, 16PJ138 or Erthenvar/Thonk
Last edited by negativspace on Wed Aug 07, 2013 12:11 pm, edited 85 times in total.

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raisinbag
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Post by raisinbag » Sat Dec 08, 2012 11:12 pm

looks cool, I'd most likely join in the fun if it happens.

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SMS303
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Post by SMS303 » Sat Dec 08, 2012 11:21 pm

maybe 2 panels + pcb's
decision will depend on price and availibity of budget 8_)
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mckenic
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Post by mckenic » Sat Dec 08, 2012 11:27 pm

Looks VERY handy for any system!

Depending on overall price - yep I'd certainly take one!

:tu:

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the83
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Post by the83 » Sat Dec 08, 2012 11:41 pm

I'd get in on that.
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Post by mikecameron » Sat Dec 08, 2012 11:57 pm

I love the look of it. I have most of this functionality in my main system already, but I've been toying with the idea of a smaller portable system and this is perfect. Only thing that would make this better would be the addition of slew somehow. To need a CVP in addition to this for the slew in a small system is just eating HP when much of the functionality is the same. Either way, I'm in.

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Post by whitewulfe » Sun Dec 09, 2012 12:10 am

Out of sheer curiosity, 5U friendly for the PCB? ^_^

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James
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Post by James » Sun Dec 09, 2012 12:14 am

This looks great! Maybe a basic slew could replace the passive mult section, since that functionality can be covered by Stackcables?

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Post by regenbot » Sun Dec 09, 2012 2:37 am

I'll take one set, most likely :tu:

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Post by synaptech » Sun Dec 09, 2012 3:23 am

Stop making cool things please, my wallet is hurting. Possibly in for 2 panels/pcbs. :tu:

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Post by Dego » Sun Dec 09, 2012 3:35 am

I love it. Now all I need is an converter for formats.

I want one

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Post by negativspace » Sun Dec 09, 2012 3:38 am

James wrote:This looks great! Maybe a basic slew could replace the passive mult section, since that functionality can be covered by Stackcables?
Thank you! There are lots of us who don't use Stackables, though, and even most wigglers who do like to have some proper mults. I'm hesitant to pull those. What I could do, though, is swap the middle attenuverter for a slew.

whitewulfe wrote:Out of sheer curiosity, 5U friendly for the PCB? ^_^
I would say 'adaptable' at the very least. :tu:

I'll probably do a board for the panel controls and then couple a 2nd board with all of the circuitry on it using .100 headers. You could wire straight from the header pads if all else fails. The circuitry is all opamp based so the different supply voltage won't be an issue.

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Post by mouldi101 » Sun Dec 09, 2012 4:14 am

Put me down for one please!

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Post by pre55ure » Sun Dec 09, 2012 4:26 am

probably in for 2 depending on price etc...

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Post by ringstone » Sun Dec 09, 2012 5:26 am

2-4 for me please, not sure quite how many yet, will have to see how finances are when they arrive.

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Post by Rigo » Sun Dec 09, 2012 5:57 am

Would it be possible to connect the passive multiples to the buffered ones, with the connection broken when a cable is inserted ? I know it can be done, but it would be nice if the panel layout would make it easier to do ... (the 2 unbuffered multiples in one line each, not in squares)
But I'd like panel + PCB anyway.

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scozbor
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Post by scozbor » Sun Dec 09, 2012 6:19 am

would be keen for 1 - depending on timing / price

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Post by home_listening » Sun Dec 09, 2012 7:01 am

I'm Keen!

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Microscopial
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Post by Microscopial » Sun Dec 09, 2012 8:03 am

hey jason, lurvely, chuck one in my pile ,nudge nudge ,wink wink lol
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Post by negativspace » Sun Dec 09, 2012 9:21 am

Your pile will happen well before this does. :hihi:

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spotta
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Post by spotta » Sun Dec 09, 2012 9:44 am

Up for a panel and board :tu:
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Post by Microscopial » Sun Dec 09, 2012 11:04 am

well im still up for one anyway wohoooooooooooooo
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Post by whitewulfe » Sun Dec 09, 2012 12:27 pm

negativspace wrote:I would say 'adaptable' at the very least. :tu:

I'll probably do a board for the panel controls and then couple a 2nd board with all of the circuitry on it using .100 headers. You could wire straight from the header pads if all else fails. The circuitry is all opamp based so the different supply voltage won't be an issue.
That's great to hear! I asked primarily because it has quite a few useful features :)

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Post by kozepz » Sun Dec 09, 2012 3:10 pm

Definately interested in 1 complete kit!

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