On Mon, 1 Dec 1997 09:37:43 -0500 **NERI**
<nllosat@MAIL.COSAPIDATA.COM.PE> writes:

But do you know a method in which you do the same thing with
>=
>7x5 displays with bicolor LEDs? ( Red, Green and Yellow also) .I think
>=
>the hardware would become a lot more complicated.=20

If you use the LEDs with 3 leads, then the red and green sides share one
common lead (connected to the "row" driver), and there would be twice as
many "column" drivers,  half of them for all the reds (same as if the
matrix were just red LEDs) and more for the green sides.  Of course the
row drivers and the power supply would have to be capable of twice the
current if the red and green sides are to be turned on at the same time.