FrankenSerial Interface (formerly the Stamp Stretcher 1B Kit), (Item 3-203) SRP $39.95
A simple, inexpensive kit that adds 16 general purpose input/output lines AND an 8-bit analog-to-digital converter to a BASIC Stamp or any serial device. Use it with the Stamp 1 for 23 I/O lines, & the Stamp 2 for 31 lines total! Communicates via a single I/O line, up to 9600 baud.
Includes PC board, all parts, great instructions and app notes. Size: about 55 mm (2.2 in) square.
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