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View Full Version : 40-pin connector/cable for PCBs



Bobb Fwed
05-22-2010, 03:44 AM
I know this isn't quite the correct forum to post this, but I am looking for a 40 (or more) position connector to connect two PCBs. I post this here because it is definitely the most in-the-know crowd, and I expect the quickest response here. If it helps, I am using it to connect my propeller (and many other things) to an auxiliary board.

I don't have too many requirements on it, it needs to be able to transfer (at worst) about an amp on a connection or two.
I want something that can mount to the PCBs with relative ease (thru-hole is preferable). And both cables and receptacle are easily purchasable from either Digi-key or Newark.
I prefer row connectors (like 2 to 4 rows), but a round connection could work as well.

Even just a name for what I am looking for (on Digi-key) would be nice. I see about 100 categories that could potentially describe what I am looking for. And most of the items in the categories I have looked through are non-stocked items.


EDIT:
Here is kind of what I am looking for, but I flexible:
www.avx.com/docs/catalogs/8483.pdf (http://www.avx.com/docs/catalogs/8483.pdf)

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April, 2008: when I discovered the answers to all my micro-computational-botherations!

Some of my objects:
MCP3X0X ADC Driver (http://obex.parallax.com/objects/488/) - Programmable Schmitt inputs, frequency reading, and more!
Simple Propeller-based Database (http://obex.parallax.com/objects/493/) - Making life easier and more readable for all your EEPROM storage needs.
String Manipulation Library (http://obex.parallax.com/objects/543/) - Don't allow strings to be the bane of the Propeller, bend them to your will!
Fast Inter-Propeller Comm (http://obex.parallax.com/objects/546/) - Fast communication between two propellers (1.37MB/s @100MHz)!

Post Edited (Bobb Fwed) : 5/21/2010 7:52:58 PM GMT

Ale
05-22-2010, 04:15 AM
WHat if you use several wires to distibute the current ?... 4 would work for 1 Amp I think... It is going to be ways cheaper than geting those kinds of connectors... I saw them in some Eagle library... I do not seem to find them now :(

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Visit some of my articles at Propeller Wiki:
MATH on the propeller propeller.wikispaces.com/MATH (http://propeller.wikispaces.com/MATH)
pPropQL: propeller.wikispaces.com/pPropQL (http://propeller.wikispaces.com/pPropQL)
pPropQL020: propeller.wikispaces.com/pPropQL020 (http://propeller.wikispaces.com/pPropQL020)
OMU for the pPropQL/020 propeller.wikispaces.com/OMU (http://propeller.wikispaces.com/OMU)
pPropellerSim - A propeller simulator for ASM development sourceforge.net/projects/ppropellersim (http://sourceforge.net/projects/ppropellersim)

Tubular
05-22-2010, 04:26 AM
Bobb,

Are the 2 pcbs "co planar", or at right angles?

Bobb Fwed
05-22-2010, 04:31 AM
Ale said...
WHat if you use several wires to distibute the current ?... 4 would work for 1 Amp I think... It is going to be ways cheaper than geting those kinds of connectors... I saw them in some Eagle library... I do not seem to find them now :(


Yeah. That is kind of what I was thinking anyway. 40 pins actually accounts for three power (total 3 or less amps) and three ground wires. But dedicated power lines sounded nice.
I was moreso thinking something in that formfactor rather than that part itself. Seeing as those have the same problem as all the parts I am trying to find: non-stocked at all of my suppliers. I was looking at IDE (PATA) sockets and cables for hard drives and the like, anything like that would work.

No one has done anything like this before on their PCBs? Someone must have done this at some point. Or posses some advice on how to execute it.

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April, 2008: when I discovered the answers to all my micro-computational-botherations!

Some of my objects:
MCP3X0X ADC Driver (http://obex.parallax.com/objects/488/) - Programmable Schmitt inputs, frequency reading, and more!
Simple Propeller-based Database (http://obex.parallax.com/objects/493/) - Making life easier and more readable for all your EEPROM storage needs.
String Manipulation Library (http://obex.parallax.com/objects/543/) - Don't allow strings to be the bane of the Propeller, bend them to your will!
Fast Inter-Propeller Comm (http://obex.parallax.com/objects/546/) - Fast communication between two propellers (1.37MB/s @100MHz)!

Post Edited (Bobb Fwed) : 5/21/2010 8:36:30 PM GMT

Bobb Fwed
05-22-2010, 04:34 AM
Tubular said...
Bobb,

Are the 2 pcbs "co planar", or at right angles?


No, that would be too easy (I wish I had such an option). I have an old design that had through hole headers on one board and SMT pads on the other and had the 90-degree connection you are probably thinking of (or just two sets of SMT pads for the co-planar).

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April, 2008: when I discovered the answers to all my micro-computational-botherations!

Some of my objects:
MCP3X0X ADC Driver (http://obex.parallax.com/objects/488/) - Programmable Schmitt inputs, frequency reading, and more!
Simple Propeller-based Database (http://obex.parallax.com/objects/493/) - Making life easier and more readable for all your EEPROM storage needs.
String Manipulation Library (http://obex.parallax.com/objects/543/) - Don't allow strings to be the bane of the Propeller, bend them to your will!
Fast Inter-Propeller Comm (http://obex.parallax.com/objects/546/) - Fast communication between two propellers (1.37MB/s @100MHz)!

kwinn
05-22-2010, 04:58 AM
40 or 50 pin ribbon cables & connectors should work and are probably the least expensive option. I use up to 4 16 pin ribbon cables with my protoboard to provide signal and power to prototype circuit boards.

WBA Consulting
05-22-2010, 05:05 AM
Some avenues to travel down......

www.tycoelectronics.com/catalog/menu/en/17693?BML=10576,17560,17536,16976 (http://www.tycoelectronics.com/catalog/menu/en/17693?BML=10576,17560,17536,16976)

www.molex.com/molex/products/group?channel=products&key=extreme_power_products (http://www.molex.com/molex/products/group?channel=products&key=extreme_power_products)

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Andrew Williams
WBA Consulting
WBA-TH1M Sensirion SHT11 Module (http://www.aestheticacoustics.com/sht11_01.htm)
My Prop projects: Reverse Geo-Cache Box (http://forums.parallax.com/showthread.php?p=869153), Custom Metronome (http://forums.parallax.com/showthread.php?p=906277), Micro Plunge Logger (http://forums.parallax.com/showthread.php?p=875698)

Fred Hawkins
05-22-2010, 07:24 AM
http://www.hirose-connectors.com/connectors/H216boardtoboardconnectors.aspx?p1=1


These may not be the cheapest or the easiest to find, but the link does offer a pdf for each variety of connector.

Tubular
05-22-2010, 08:06 AM
For versatility I like the hirose Fx2 series for this kind of thing
www.hirose-connectors.com/connectors/H205SeriesGaiyou.aspx?c1=FX2&c3=3 (http://www.hirose-connectors.com/connectors/H205SeriesGaiyou.aspx?c1=FX2&c3=3)

But 40 pin IDC sockets are so cheap (6 cents) thanks to IDE drive connectors. They will easily do an amp.

Post Edited (Tubular) : 5/22/2010 12:12:20 AM GMT

yarisboy
05-22-2010, 11:23 AM
I always save the 40-wire IDE cables out of dead PCs used for the hard drives before the SATA drives came out. Any computer re-cycler will have bins full for copper reclamation. The box headers can be cheaply ordered in straight up or 90 degrees from Mouser. They are also available in a locking version for use outside a chassis. For outside use look for the later ones that had the ribbon reconfigured to a round cable with shielding. The flat cables can be noise makers in some cases. With these bad boys you can remote all connections to a prop. On my current project I'm using 34-wire cables. They are recycled floppy drive cables. Here again all the through hole connectors you could want are cheaply available from Mouser and are in the ExpressPCB library.

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MOORE'S LAW: The capabilities of electronics shall double every 18 months.
cloyd's corollary: Hardware is easy, software is hard.