In SX Microcontrollers, SX/B Compiler and SX-Key Tool, tdg8934 wrote:

Great. I will try that out this week. 

Remember that the 2 lines are going to /OE control lines on 2 pair of 74HC573 ICs. The /OE just allow the red or green pairs of LEDs to pass through or not (turn on or not that is). So the /OE lines will just need to be LOW to turn either the red LED pair of 74HC573 ICs on or the other green LED pair of 74HC573 (2 are needed for both red and green LED pass through as a single 74HC573 only has 8 outputs (so we need a pair for 16 red or 16 green LED outputs of control) as this is a 16 x 16 LED display). 

Can I just use any inverter (e.g. 74HC04) or does it have to be the CD4049 (which I don't have - perhaps a 74LS04 with a CD4050 buffer would work)?

Thanks again!

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