Hi Russ,

My interest was to find a solution for the LEDs board that Roger has already made.

If there is no solution for the original LED board, then a new board with I/O port
expanders ICs + transistors is in my opinion the way to go.
(One I/O + 1 transistor for each 50mA LED). That way all the LEDs can be
ON at the same time and each LED can be individually controlled.

Best regards,

Luciano