We have just released a Serial Keypad Encoder IC designed
specifically for the BASIC Stamp.
With Ser-Key you can connect up to 10 simple push-button
switches to build your own serial keypads.
Ser-Key sends the ASCII value for keys 1-10 serially to the
BASIC Stamp over a single I/O-pin, with a VALID-DATA pin
going to a logic low during keypresses.
Ser-Key [noparse][[/noparse]does not] require a matrix keypad.·
switches are all you need, and you can use as few, or as many as
you need for your design, up to 10.
633 N. 8th St.
Canon City, Co. 81212