Socket board interconnect cable

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mmeixner
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Socket board interconnect cable

Post by mmeixner » Sat Oct 29, 2016 4:19 pm

So, maybe this is a rather dumb question, but I want to make sure ...

I soldered the headers following the silk screen (and on the correct side of the SOCK board :hihi: )

Now building the interconnects for my multimix - do I connect the same places in both connectors, or is it the other way round? Please have a look here: is this right or wrong?

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tvh
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Post by tvh » Sun Oct 30, 2016 4:36 am

The way you have it shown is the incorrect way. I did this too with my first VCO and wondered why it was acting strangely :hihi: You want the wires in the same place on each connector.

This is how I do it since I tend to zone out when wiring...What I do is make a tiny mark with a sharpie on the same side of each female connector , then as I connect the wires I start at the mark and move the other direction. wire 1 to hole 1 on each, wire 2 to hole 2 on each, wire 3 to hole 3 on each, etc.

mmeixner
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Post by mmeixner » Sun Oct 30, 2016 5:54 am

tvh wrote:The way you have it shown is the incorrect way.
Aha, I suspected this - thanks! (love this forum :grin: )
I did this too with my first VCO and wondered why it was acting strangely :hihi: You want the wires in the same place on each connector.
...

Wire 1 to hole 1 on each, wire 2 to hole 2 on each, wire 3 to hole 3 on each, etc.
So, just for my, and potentially other's education: it's established practice do build cables like this unless stated otherwise? (for audio cables it sure is ...)

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tvh
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Post by tvh » Sun Oct 30, 2016 7:05 am

Forgot to add, facing them both one direction may help visualize wiring. These are wired the same, for example:

Image
mmeixner wrote: So, just for my, and potentially other's education: it's established practice do build cables like this unless stated otherwise? (for audio cables it sure is ...)
This is how I've wired all my Oakley modules so far, I'm on number 22 (and counting... :guinness: ). Once you do a few of these modules the connections are all pretty similar, which is nice.

Hmm...After looking through the multimix builder's guide, it doesn't say which pin goes to which pin, like it does in the VCO Builders guide, for example.

Perhaps Tony could add "which wire to which pin" info to the next version of the General Construction Guide in the Interconnect section, as this was a major source of confusion for me, also.

mmeixner
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Post by mmeixner » Sun Oct 30, 2016 7:16 am

tvh wrote:Forgot to add, facing them both one direction may help visualize wiring. These are wired the same, for example:

Image

This is how I've wired all my Oakley modules so far, I'm on number 22 (and counting... :guinness: ). Once you do a few of these modules the connections are all pretty similar, which is nice.

Hmm...After looking through the multimix builder's guide, it doesn't say which pin goes to which pin, like it does in the VCO Builders guide, for example.

Perhaps Tony could add "which wire to which pin" info to the next version of the General Construction Guide in the Interconnect section, as this was a major source of confusion for me, also.
Thanks for clearing this up, again!
I'm building an "Oakley Tool Box" to complement my Hordijk, for now I have two Multimix, two VRG and a QuadVCA here waiting to be finished, so to answer that question for the first module helped :guinness:

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Synthbuilder
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Post by Synthbuilder » Mon Oct 31, 2016 5:30 am

tvh wrote:Perhaps Tony could add "which wire to which pin" info to the next version of the General Construction Guide in the Interconnect section, as this was a major source of confusion for me, also.
Yes I will do this.

It is good engineering practice to make pin 1 to pin 1 on all board interconnects and cables. To do otherwise would be very confusing. Although reversed wiring does happen on some types of cables, SCART sockets have partial reversed connection, but it is rare.

That said, I have had this question asked twice of me in the last month, although I cannot remember it being asked prior to this. I think it maybe part of the confusion is because the headers on the socket board are mounted on the rear of the board and not the top. This effectively reverses the pin out. However, the socket boards have been laid out with a mirrored legend and thus the pin 1 to pin 1 rule is maintained.

Tony

mmeixner
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Post by mmeixner » Mon Oct 31, 2016 5:37 am

Synthbuilder wrote: It is good engineering practice to make pin 1 to pin 1 on all board interconnects and cables. To do otherwise would be very confusing. Although reversed wiring does happen on some types of cables, SCART sockets have partial reversed connection, but it is rare.
Yes, I thought so, somehow - thanks for making this clear!

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Leverkusen
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Post by Leverkusen » Mon Oct 31, 2016 5:43 pm

Uh, bummer! I remember having a hard time looking the right way up from the photographies of my first module in the manual. And I was quite relieved when it was right then...meanwhile I even enjoy crimping the cables with those tiny little things I can barely see... :hihi:

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HowDoIKnow
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Which is pin 1?

Post by HowDoIKnow » Sun Nov 10, 2019 3:23 pm

Hi

I am struggling a bit to make the socket 4 to board interconnect for the VC-ADSR. Which is pin 1 on each PCB? Having soldered the headers on, the square pin 1 is almost obscured by solder.

I think pin 1 is by the I/O legend on the main VC-ADSR board and pin 1 on the socket 4 board is also by that legend, and next to the L1 link holes?

Thanks

hdik
Berlin School Sequencer Addict
My MU

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Synthbuilder
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Re: Which is pin 1?

Post by Synthbuilder » Mon Nov 11, 2019 5:16 am

HowDoIKnow wrote:I think pin 1 is by the I/O legend on the main VC-ADSR board and pin 1 on the socket 4 board is also by that legend, and next to the L1 link holes?
That is correct.

With any Molex or MTA header, pin 1 is the top pin when you hold the header vertical with the pins facing you and with the friction lock to the left. For example the main power headers have pin one to the top of the board.

Tony

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HowDoIKnow
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Post by HowDoIKnow » Mon Nov 11, 2019 8:55 am

Many thanks Tony.

Daniel
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