Go Down

Topic: LM335 (Read 3 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?
"Hello, I must be going..."
"You gotta fight -- for your right -- to party!"
Don't react - Read.
"Who is like unto the beast? who is able to make war with him?"

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?

Go Up