RYO 3x VCA - Stripboard layout help

BlacKcaT · Last edited by BlacKcaT on Thu Jan 25, 2018 6:36 am; edited 1 time in total

Never done a stripboard layout from schematics. I know there are some free sw for it, but dunno where to start. Is there any of you so kind to help me with this?

http://ljunggrenaudio.com/products/3XVCA/3xVCA%20schematic%201.0.gif

I'm looking to do that on stripboard and put in my eurorack.
Hope this insn't unfair, since the schematics are online, and I only want to build one or two for my system.
Any help is much appreciated!

EDIT: If you are going to build this one, please read all the 3ad in order to follow alla the changes made at the project. Many thanks to Nardu, who made the job!

gabbagabi · Posted: Mon Jan 15, 2018 1:17 am Post subject:

there is a demoversion of "Lochmaster"
https://www.electronic-software-shop.com/forums.html?seo=demo-versionen

in the demoversion u cant save ur drawings, but u could do screenshots

cheers

ps. : why triple vca? it leaves one half of the 13700 unused, may make it 2x2?

khakifridge · Joined: Jul 15, 2014 Posts: 27 Location: UK

If you're looking for software, then check out DIYLC. Good for vero, perf and PCBs.

BlacKcaT · Posted: Mon Jan 15, 2018 10:41 am Post subject:

gabbagabi · Posted: Mon Jan 15, 2018 10:53 am Post subject:

in every of the 3 VCAs in the schematic is written Ljunggrenaudio.com
just leave the one on the bottom out
so u will use one LM13700 and two tl074 to build two VCAs

BlacKcaT · Posted: Mon Jan 15, 2018 11:23 am Post subject:

BlacKcaT · Posted: Mon Jan 15, 2018 11:25 am Post subject:

gabbagabi · Posted: Tue Jan 16, 2018 8:42 am Post subject:

in bocca lupo per il progetto

Nardu · Joined: Feb 28, 2011 Posts: 62 Location: Braila, Romania

A stripboard version for 2X VCA 64x92mm. Almost finished.
I used LochMaster - http://www.abacom-online.de/uk/html/body_lochmaster.html

RYO 2x VCA.jpg

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RYO 2X VCA stripboard version with LochMaster software

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BlacKcaT · Posted: Wed Jan 17, 2018 5:08 am Post subject:

@nardu ! This is great! Thank you so much for this! I'll check it Razz

Nardu · Joined: Feb 28, 2011 Posts: 62 Location: Braila, Romania

Not finessed !
Here with potentials
I used IC2, IC5, but with the pins renumber. Pins IC3 are the same.
Instead of D1,D2,R1,R2,C1,C2,C3,C4 I have used 2 ferrite bead. I will complete pcb with this pieces too.

RYO 2x VCA_1.jpg

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RYO 2X VCA stripboard version with LochMaster software. Potentials

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gabbagabi · Posted: Wed Jan 17, 2018 7:55 am Post subject:

i posted here (page4)
http://electro-music.com/forum/post-432536.html#432536
how to make a pcb with lochmaster

may u want to do so?

btw, nice work
always a good feeling to see people designing and sharing

Nardu · Joined: Feb 28, 2011 Posts: 62 Location: Braila, Romania

@g.gabba, I use for pcb design Sprint-Layout 6.0 from Abacom http://www.abacom-online.de/uk/html/body_sprint-layout.html .
It's simpler and more productive. Export Gerber files, Drill data (Excellon), Isolation milling (HGPL, .plt), bmp, jpg, gif, emf. Print all layers with option.
All you need to produce DIY pcb; press&peel, toner transfer, CNC milling, plotter, PCB manufacturing... China!
Here is an example

Midi Thru Box_pcb-silkscreen.jpg

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Silkscreen & bottom pcb

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Midi_Thru_Box.jpg

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Photo view with solder mask, like real

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Nardu · Joined: Feb 28, 2011 Posts: 62 Location: Braila, Romania

Front panel idea 4HP EuroRack

RYO 2x VCA-4HP_eurorack_var.jpg

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RYO 2x VCA-4HP_eurorack.pdf

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RYO 2x VCA-4HP_eurorack v,2.pdf

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RYO 2x VCA-4HP_eurorack v,2.pdf

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RYO 2x VCA-2HP_eurorack.fpd

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RYO 2x VCA-2HP_eurorack.fpd

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RYO 2x VCA-2HP_eurorack v,2.fpd

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RYO 2x VCA-2HP_eurorack v,2.fpd

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gabbagabi · Posted: Thu Jan 18, 2018 12:58 am Post subject:

hi nardu, iam also using sprint-layout Smile

Do u guys know how the 13700 behaving when the CV is negative?
they just quiet or they get damaged? Since there is no protection against negative CV in the Schematic i could imagine that they just go quiet.

And If they do so u could pimp this dual VCA further to a Ringmod with a switch.

BlacKcaT · Posted: Thu Jan 18, 2018 11:25 am Post subject:

Hi Nardu,
you are so kind Smile

Thank you for sharing all this info and the panels and so on!
This is a nice present for the community !

I've a question about sprint-layout. Is it also possible to draw the schematics, and then let the sw do the p'n'p layout for toner transfer method?
This would be really interesting indeed!

BlacKcaT · Posted: Thu Jan 18, 2018 11:28 am Post subject:

gabbagabi · Posted: Thu Jan 18, 2018 11:48 am Post subject:

cv2 input goes to the output of IC2D
and
IN2 input goes to the output of IC5C
so it will be a double switch

ONLY if the anwer is YES to:
Do u guys know how the 13700 behaving when the CV is negative?
they just quiet or they get damaged? Since there is no protection against negative CV in the Schematic i could imagine that they just go quiet.

Nardu · Joined: Feb 28, 2011 Posts: 62 Location: Braila, Romania

gabbagabi · Posted: Fri Jan 19, 2018 12:10 am Post subject:

i guess he meant something like the partplace & autorouter function- which sprint-Layout does not have

BlacKcaT · Posted: Fri Jan 19, 2018 2:38 am Post subject:

Nardu · Joined: Feb 28, 2011 Posts: 62 Location: Braila, Romania

Stripboard version for 2X VCA 76x92mm. Is not like the original scheme
All you need here - RYO 2x VCA stripboard.zip

RYO 2x VCA bottom_w.jpg

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RYO 2x VCA bottom 3D_w.jpg

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RYO 2x VCA top_w.jpg

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RYO 2x VCA stripboard.zip

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All you need

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RYO 2x VCA stripboard.zip

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RYO 2x VCA-2HP_eurorack v.2.1.fpd

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modified front panel, gap between holes, inches

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Nardu · Joined: Feb 28, 2011 Posts: 62 Location: Braila, Romania

BlacKcaT · Posted: Tue Jan 23, 2018 11:33 am Post subject:

Super!

Nardu · Joined: Feb 28, 2011 Posts: 62 Location: Braila, Romania

Stripboard version 2 for 2X VCA. Original scheme; CV1,CV2 - LM324, IN1-Out1, IN2-Out2 - TL084

RYO 2x VCA top_v.2.jpg

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