DTMF-ENC16 is an inexpensive, self contained, DTMF (dual tone multiple frequency) encoder board with a full size 16 button keypad. The board has a standard RCA audio out jack and can either be powered with a 9 volt battery or through the 2.1 mm DC IN jack.
KeyVerter® PS/2 Keyboard To RS-232/TTL Converter
KeyVerter® converts key stroke events from any PS/2 keyboard (small DIN connector) into an RS-232 and TTL serial output stream. Keyboard enable your favorite microcontroller like Parallax's BASIC Stamp 2 using only one 9600 baud serial input pin.
