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Topic: LM335 (Read 6111 times) previous topic - next topic

zeus2kx

Please tell what you wanted to add.

Thanks.

runaway_pancake

You should still get "5V" even using USB. 
At least, I do with my "2009".
But, +V_usb has a wide range, too, so that could throw your readings off.  Is that it?
"Who is like unto the beast? who is able to make war with him?"
When all else fails, check your wiring!

zeus2kx

Here I add some results:

Only USB - Vcc = 5V
Code: [Select]
Celsius: 41.79
Kelvin: 314.94

Celsius: 41.79
Kelvin: 314.94

Celsius: 41.79
Kelvin: 314.94


Only USB - Vcc = 3.3V
Code: [Select]
Celsius: 23.24
Kelvin: 296.39

Celsius: 23.24
Kelvin: 296.39

Celsius: 23.24
Kelvin: 296.39


With adopter - Vcc = 5V
Code: [Select]
Celsius: 23.24
Kelvin: 296.39

Celsius: 23.24
Kelvin: 296.39

Celsius: 23.24
Kelvin: 296.39


With Adopter - Vcc = 3.3V
Code: [Select]
Celsius: 3.22
Kelvin: 276.37

Celsius: 3.22
Kelvin: 276.37

Celsius: 3.22
Kelvin: 276.37


Temp reading in case when Arduino was connected through USB only and Vcc = 3.3V is exactly equal to Arduino plugged in with adopter and Vcc = 5 V.
Strange, isn't it?

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