Originally Posted By: mlord
One way to salvage the situation would be to add three more power transistors (PNP), one in series with each of the existing R-G-B trio on the controller board, except selected and wired to reverse the voltage output. Those will likely need a pair of resistors each to scale down the ouput of the existing transistors to levels that can be used to control the add-on ones.

Or.. perhaps rewire the emitter/collector paths of the existing drivers to get the correct ouput polarities. That might not be too bad, actually. Probably the best approach, depending on the exact details.

Edit: I wonder if the board layout has optional traces already to accomplish just that ?


Edited by mlord (07/06/2012 14:28)