... i've got recently two Matrix Orbital USB-displays (204-24-USB with 4 rows and 202-24-USB with 2 rows), which are the displays combined with two PIC-controllers, which have USB/RS232, some MOSFET-outputs, TWI-ports and a keyboard-port for "row-column-matrix-keyboards" with up to 24 different keys being scanned (but can be a lower count too).
Don't know, whats the price, because i've received them for the shipping costs only, but this devices seems to be perfect for easy interfacing ... and will add some more I/O-ports and TWI-interfaces to the reprap ...
Don't know, whats the price, because i've received them for the shipping costs only, but this devices seems to be perfect for easy interfacing ... and will add some more I/O-ports and TWI-interfaces to the reprap ...