Arduino LabView temperature problems.

Hi!

When connecting a TMP36 tempsensor to the arduino and measuring it with labview, the measured voltage from the sensor is varies a lot when i put my hand close to the USB-cable or the any of the other wires. I have tried to connect a pull-down to the tempsensor without success.

Does the value change if you just print it to the Serial Monitor?

PaulS: Does the value change if you just print it to the Serial Monitor?

Yes it does :(

Yes it does

Then it isn't a LabView problem, or an interfacing with software on the computer problem. It's a hardware problem.

PaulS: Then it isn't a LabView problem, or an interfacing with software on the computer problem. It's a hardware problem.

I have tried with two different arduinos, two sensors, two USB-cables. Can it be the power from my macbook?

Can it be the power from my macbook?

Maybe. A schematic and photo of your setup might be useful.

PaulS:
Maybe. A schematic and photo of your setup might be useful.

Yes, i will upload when i get home