On 04/23/2012 02:44 PM, Mega wrote:
I use LM335 because it's very very easy to use. Of course, I could also use a PTC (about half of the price or even lower, but
> accuracy?).
Here's a good write up of using a diode for temp sensor.
It needs a volt reference, so pick a micro that has one of those.
Most MSP430 have one. (See below)
http://www.rst-engr.com/rst/articles/KP90APR.pdf
Here is some thermostat write up, and code for MSP430:
He uses a micro with a $2.50/ qty one price though...so some reading of the
datasheets of the minimal MSP430G2230IDR in 8 pin SOIC pkg for 0.76 USD qty ten, $46/qty 100
That one has internal temp sensor and 4 channel ADC 10 bits.
I need to start something with that one!
John
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