I decided to make a cable interface for input and output of the Raspberry Pi (GPIO) for connect to Protoboard.
The GPIO connector has 26 pins. I found in my scrap, flat cable with 26 pins but one pin closed in the connector, ie with 25 pins.
I saw in the description of the GPIO pins that is ground pin .
So it will not be missed, because there are other ground pins on GPIO. Then I will make a hole in the cable connector in order to connect the GPIO.
I used a few bars of pins (easy to find). I crumpled the tips of the bar with smaller pins and then soldered the two bars - see the photos.
http://www.flickr.com/photos/jgustavoam ... 650634969/
It was very good. Although not tested.
Remember that the interface uses levels of 3.3 V.
So do not plug in circuits that use 5V!
Gustavo Murta (Belo Horizonte - Brazil)