Using additional GPIO pins

[tilimil]

For my project, I need to use 3.3v, 5v to drive some LEDs. I also need to use ground and 6 other GPIO pins.

Two questions:
1) If I have a few LED's pulling some power from the 3.3v and 5v pins, do you foresee any issues?
2) Do you have any suggestions for the best way to do this with the headers you have provided for the Octo Sound card? Or should I just wire the octo pings to the board and then wire my other pings separately? I saw where you showed the I2C and GPIO pins that are in use, but did not see which power and ground pins you are using.

Thanks.

[flatmax]

Hi,

I think the 3.3V and 5V rails are common. You can use any of them. Beware that the 5 V rail may pulse noise when you turn a LED on and off ... would be interesting to hear your results.

Matt

[tilimil]

Does the bottom of the board have a female header that will connect directly to the RPI?

TIm

[flatmax]

Yes.