Ribbon cable for larger connector

Community PCB Design
1

Hello,

I would like to connect an STM32F4 board – which has two 50-pin (2x25) connectors – to another home-made board. I only need access to about 10-12 of those 100 pins. I’d like to use 2-3 small ribbon connectors to do the job, but all of the ribbon connectors that I am seeing online have ends that are too “thick”. In other words, the ends of the connector will not fit in between the pins that I am using and the pins that I am not using. I’d rather not cut the unused pins on the STM, so I can use it for other projects as well.

I am hoping that someone can point me in the right direction to find a cable that will fit.

Thank you.

-Bob

2

you can get 2*25pin flat cable connector but I don’t see much point for 10-12 connections

one option is to put something like this: http://www.pololu.com/catalog/product/1032 on your board and just plug the stm32 on top it like arduino and shields

makes more sense and is more flexible to use something like this: http://www.pololu.com/catalog/product/1918 and http://www.pololu.com/catalog/product/1801

3

Something like this might do the trick - they come in a variety of sizes, and you’ll need to buy the crimp terminals separately:

http://uk.farnell.com/te-connectivity-a … dp/8179980

4

10-12 connections is not too bad to work with.

I do a fair amount of work with cable harnesses. If you want part numbers for connector receptacles and pins/sockets, let me know. Assuming the header is “standard” 0.1" pitch, I can point you at some DigiKey parts that will work fine and are easy to use. The only issue you may come across is that you’ll probably need to buy a crimping tool, but there are cheap ones out there that do an OK job.