26 October 2009

FT817 keypad - a completed one

I have built one of my FT-817 keypads for another person, and here's how it looks like when unassembled:

I have included connectors on the serial cable and on both LEDs. All connectors are different so the user will not mix them. The overall footprint of the completed keypad is slightly larger than the matrix keypad itself, which sits on the circuit using a matched pin-header strip.

Except for the book, what is shown is worth 20€ (@2009) of materials and circa 3 hours of work.