HP15CLE old can of worms

[robert rozee]

there is a much much easier approach to fixing the 15C.LE bugs, that involves precisely no programming and no circuit design:

purchase a modern 12C (that has the same mechanics as the 15C.LE). strip out the internals and from the mechanical dimensions create a PCB that fits within the casing, with the circuitry for the swiss micros clone laid out on the board. program the processor with the swiss micros 15C code - which i believe is freely downloadable. i strongly suspect the swiss micros guys would even be willing to lend you a hand in the form of email support of your endeavours.

at this point you can either:

1. relabel the 12C keys and escutcheon as required using the methods used to create the WP-34, then reassemble your newly created PCB into the re-purposed 12C case, or,

2. strip out the internals of your rather expensive 15C.LE and refit your new PCB into that casing. the finished product will be indistinguishable from the 15C.LE but lack all of the bugs. it will also likely enjoy a considerably extended service life to that of an original 15C.LE.


rob :-)