Further to previous posts, I have now fully soldered up the light bar project that I posted about earlier. If you remember I just had to solder on a 10 led light bar.
Project with 10 LED block.
And for completeness the reverse (soldered side) is here
I have not tested this with the Arduino yet, however I have tested by connecting my 9v power project and checking the LEDs work when +v is connected a pin on the top row.
As this works then it should work fine when connected to either a Arduino OR Raspberry Pi GPIO port.