On Mon, 19 Jul 1999, Clint Sharp wrote:

> I'm trying to work out a spec for a project based 'round a PIC, the
> project needs to control seven relays, LCD (16x4), I2C (2 devices),
> various LEDs (probably four) and a five key keypad and, hopefully, a
> 40/80 column cash register type printer. The chips I'm looking at are
> the 16C64/5 and 16C74, am I right in assuming that the 16C65 is
> basically a C74 without the ADC? Can I just use a /JW C74 and ignore the
> ADC (would be nice to have for a later project) without ill effects or
> do I need to add some code to disable the ADC effectively, thus making
> it non-suitable for the C64/5?
> Also, does anyone have any suggestions about what kind of printer mech
> and RTC (I2C) to use (only looking for simple graphics and text)?
> --
> Clint Sharp


If want to save development $s, you might check out the Protean Logic
TICkit -- http://www.protean-logic.com/ The module is directly
programmable in a library-centric Functional Basic, and includes ~30
libraries, including ones for LCD, direct I2C, "simulated" I2C, and I
think keypads.  All lib source is included, freely downloadable, as is the
manual.

A ready-to-go module (chip, crystal, etc) is US$45/ea, and the raw chip is
$16 in singles.  Development station is $36-$90, depending on how much you
want to build.  I bought the $90, plus a dev board with regulator etc, and
have been *very* happy with it.


- j