CAT# TS-12
$5.75 each
Dallas DS18B20 temperature sensor chip mounted on a pc board with pins for plug-in use with Arduino and other platforms. Unique 1-Wire interface requires only one port pin for communication. Requires no external components. Can be powered from data line. Power supply range is 3.0V to 5.5V Zero standby power required. Measures temperatures from -55°C to +125°C. Fahrenheit equivalent is -67°F to +257°F.
Spec sheet available in PDF format.
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Average Customer Review:  (1 Review) Write A Review

tommy from colorado rocky mountains, driving all over the USA
I got these to work, and I like them...
I'm using obsolete Parallax (SX-28) microcontrollers (but I assume they're all about the same)...
--- these were tricky. I kept getting no response except for the reset. Finally I set up some LED's and just observed (sampled EVERY TWO micro-seconds) so that I could see the unit's responses --- it was faster than I had ever expected: my program had been too slow. I then programmed my "sampling" right into the middle of those observed responses - and the units work really well...
--- also, they usually take another reset for a another function to be performed...
--- I could query each unit's serial number, (and write it down) so I didn't have to bother with the CRC; instead, I just ignore (try, try, again) any response that is not approximately what I was expecting.
--- "everything" is inside the simple, 3-lead chip -- so I will use the cheaper single chip -- I do not know the benefits of the same chip mounted on a card for an extra $4.