You are here

Small multi-pin cables/connectors

Customising, building or repairing your own gear? Need help with acoustic treatment or soundproofing? Ask away…

Small multi-pin cables/connectors

Postby BJG145 » Fri Nov 16, 2018 12:28 am

I've recently been experimenting with putting together a DIY MIDI instrument. I've got this idea for a system where different 'dumb' controllers could be plumbed into the same Arduino-based brain, but I'm a bit stuck with deciding on a standard, compact, cheap, multi-pin cable with connector to link them up. At the moment I'm running Cat 5 network cable from the controller with an RJ45 breakout on the processor, but that only has 8 wires; I could do with more like 15 really. Any suggestions...?
User avatar
BJG145
Frequent Poster (Level2)
Posts: 3449
Joined: Sat Aug 06, 2005 12:00 am

Re: Small multi-pin cables/connectors

Postby James Perrett » Fri Nov 16, 2018 12:42 am

A D type connector would be the obvious choice - plenty of VGA cables using 15 pin D connectors.
User avatar
James Perrett
Moderator
Posts: 7607
Joined: Mon Sep 10, 2001 12:00 am
Location: The wilds of Hampshire
JRP Music - Audio Mastering and Restoration. JRP Music Facebook Page

Re: Small multi-pin cables/connectors

Postby BJG145 » Fri Nov 16, 2018 1:20 am

Thanks James, yeah, that's probably the most realistic option. I was hoping for something a bit more compact, and I just came across 24-pin USB-C, but I'm thinking I might find the wires impossibly thin to work with. (Alternatively it sounds like I should be reading up on multiplexer ICs to get multiple buttons down to fewer wires.)
User avatar
BJG145
Frequent Poster (Level2)
Posts: 3449
Joined: Sat Aug 06, 2005 12:00 am

Re: Small multi-pin cables/connectors

Postby zenguitar » Fri Nov 16, 2018 1:30 am

My Arduino/Raspberry Pi experiments have been on the back burner for a few years but I do recall all sorts of breakout boards being available for all sorts of connectors. So I Googled and Lo!

How about a USB-C breakout board?

http://www.saikosystems.com/web/p-86-us ... d-v20.aspx

Would that do the job for you?

Andy :beamup:
User avatar
zenguitar
Moderator
Posts: 8746
Joined: Thu Dec 05, 2002 1:00 am
Location: Devon
When you see a fork in the road, take it.
Yogi Berra

Re: Small multi-pin cables/connectors

Postby Sam Inglis » Fri Nov 16, 2018 8:56 am

What about Lemo connectors?
Sam Inglis
Frequent Poster (Level2)
Posts: 2348
Joined: Fri Dec 15, 2000 1:00 am

Re: Small multi-pin cables/connectors

Postby ef37a » Fri Nov 16, 2018 9:59 am

HDMI? Reliable, ubiquitous (you can buy V cheap leads from RockBottom and butcher them) and versatile, you can buy inline couplers (Homebase by crickey!) angled adaptors etc.

In case you are worried that they are non-standard for other than video? My ESI 1010E uses an HDMI cable* from the PCIe card to breakout box.

*ESI maintain the umbilical is NOT a standard HDMI cable but I bought a 5mtr one from Morrisons on offer years ago. Works famously!

Dave.
ef37a
Jedi Poster
Posts: 9563
Joined: Mon May 29, 2006 12:00 am
Location: northampton uk

Re: Small multi-pin cables/connectors

Postby BJG145 » Fri Nov 16, 2018 10:56 am

Great, thanks for all the ideas!
User avatar
BJG145
Frequent Poster (Level2)
Posts: 3449
Joined: Sat Aug 06, 2005 12:00 am

Re: Small multi-pin cables/connectors

Postby Folderol » Fri Nov 16, 2018 11:24 am

Another way you can do this if you fancy some real DIY and a bit of logic work is to use the matrix controller out of an old PS2 type keyboard, that will give you up to 105 buttons and three LEDS down a 6 pin cable - although only 4 are needed.

An arduino can be persuaded to send (near enough) the correct serial rate, or you could build it with CMOS 4000 series demultiplexers and a simple clock
User avatar
Folderol
Jedi Poster
Posts: 7222
Joined: Sat Nov 15, 2008 1:00 am
Location: Rochester, UK
Yes. I am that Linux nut.

Re: Small multi-pin cables/connectors

Postby ef37a » Fri Nov 16, 2018 12:06 pm

Folderol wrote:Another way you can do this if you fancy some real DIY and a bit of logic work is to use the matrix controller out of an old PS2 type keyboard, that will give you up to 105 buttons and three LEDS down a 6 pin cable - although only 4 are needed.

An arduino can be persuaded to send (near enough) the correct serial rate, or you could build it with CMOS 4000 series demultiplexers and a simple clock

That's easy for you to say...!

Dave.
ef37a
Jedi Poster
Posts: 9563
Joined: Mon May 29, 2006 12:00 am
Location: northampton uk

Re: Small multi-pin cables/connectors

Postby BJG145 » Fri Nov 16, 2018 12:14 pm

For a cheap and cheerful hardware solution, micro-HDMI or USB-C with 19 and 24 pins respectively look ideal. I'm a bit puzzled by the reversible nature of USB-C though...is that somehow implemented in "hardware", so that it would work with a simple button-to-input connection, or does it stem more from the protocols or something...? It's neat if it's physical.
User avatar
BJG145
Frequent Poster (Level2)
Posts: 3449
Joined: Sat Aug 06, 2005 12:00 am


Who is online

Users browsing this forum: No registered users