>-----Original Message-----
>From: Charles Craft [mailto:chucksea@MINDSPRING.COM]
>
>Component count.
>
>For the small quantity of devices I want to build I'm more
>interested in cutting number of components that have to be
>sourced/acquired and installed. Cost difference between temp
>chip and thermistor doesn't matter.
>
>A MAX232 with internal caps (expensive -yes!) and one other
>chip is the lowest parts count I could think of.
>

Fair enough.  Analog Device MicroConverter series have on board temperature
sensors.  The available parts are based around an 8051 core (12 clock per
cycle, and 1 clock per cycle), but some nice looking ARM based parts should
be available soon.  Not too bad on pricing, <$5 for a basic 28pin device
with the 12 clock core, six 12bit ADC channels, two 12bit DAC channels
(proper DACs, not PWM), SPI/I2C and a UART.  Been looking at these and the
Silicon Labs parts for a while.

Don't know any micro's with inbuilt RS232 level shifters though ;o)

Regards

Mike




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