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Topic: i2c temperaturesensor (Read 5218 times) previous topic - next topic


i'm searching for a cheap i2c temperaturesensor.
have you got some ideas?

best regards,


Personally I had the chance to buy a lot of 1wire sensors cheap, haven't worked with I2C-ones yet.

I don't know what temperatures you'll measure, maybe the LM75 would do the job.

If not, a search on "I2c and temperature" for components in stock gave me this list on Mousers site.
(hopefully there's one on it suiting your needs.)



You want to use the DS1621.  It costs about the same as a 1-wire temp sensor.

James C4S

When asking for a "cheap" solution, it is helpful to define what you consider to be "cheap"...
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com


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Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


STLM75, £1.05 from Farnell UK, but its SMT!
[ I won't respond to messages, use the forum please ]


MCP9800 is less than $1.50US.  SOT23-5 package, surface mount.


TC4 Open Source Digital Thermometer and Temperature Controller


I am currently using SHT21 sensors for my project

they are however incredibly small so kind of a pain to solder but they give humidity readings and the temperature in Celsius and Fahrenheit.  I think they are about £10 a pop.

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