ok, i want to make two 7x3 LED arrays that i will be able to input text on a PC program controlling it thru either a serial port or a USB-serial adapter. parallel is not an option. they only have to show the same as each other so i guess if i made one "control unit" it could drive both also, the size of the LED array is non-negotiable anyone got any ideas where i should start? i am assuming that i am going to need a microcontroller of sorts. I am willing to pay someone to write software/design the circuit if needs be thanks all!!