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Re: Measuring voltage from micro

Prehaps I should have said "1-Wire Bus TM" - a well known and well-defined
product with a wealth of information available for those who'd prefer to
learn and understand. I'd kindly suggest you follow the link I provided if
you're interested in that "learning and understanding" thing I mentioned.

Re: Measuring voltage from micro

I ordered an I2C ADC a couple of weeks ago, received it yesterday and
soldered it into my prototype tonight. The code I'd written for the eeprom
worked with it straight off. Now I've just go to work out how to convert a
resistance that varies from 40ohm to 1k into a voltage from 0 to 2.5 and
keep enough accuracy at the 40 ohm end of the scale.

I'll see how I go with noise, if it's a problem I'll see what I can do. I'm
already doing averaging over multiple reading so this might be enough.

I plan to have the circuit inside the cabin as it's not water proof and has
an overtemp buzzer.
Michael
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