I read Honghong's excellent presentation on building a large BlinkyTile sculpture (http://www.instructables.com/id/Pentagon-LED-Sculpture/
), and she provided some very good advice about powering Blinkys.
I have another question that I would appreciate some help with:
If I power a BlinkyTile construction (particularly a large one that draws more than 500mA) with an external power supply through a separate connector (like a barrel jack), do I need to do anything differently with the connector cable between the Lightbuddy and the BlinkyTiles?
Specifically, do I need to modify the connecting cable so that only the ground and data are connected (i.e., cut or remove the 5V line) or would it be OK to leave the 5V line intact?
i don't really understand the circuit well enough to know what happens if you connect power separately and through the Lightbuddy, too. Can someone comment on that?