LM335 thermometer: Is it simple or difficult electronic-wize?

[johnerrington]

@go_yi

I want to adjust the output voltage so that zero degree cesius will result in near zero volt outpu

You cant. The sensor works in Kelvin - so 0C = 273K = 2.73 Volts.

You can use the circuit shown here to offset and amplify the voltage to suit your needs

Using Operational Amplifiers in your Arduino project

8: Example 2. Amplifying a signal from a sensor when it has an offset voltage Many common sensors will produce a voltage that does not "sit" on the 0V rail, as shown in the blue line in this example. [opamp signals3.png] The green signal is too small (say 0.04V) to measure with any accuracy; however by amplifying it by 100 we get a signal of around 0.04*100 = 4V that can be measured. However the signal on the blue line is small, but has a dc offset of about 2.5V; multipling that by 100 gives…

The op amp is an MCP6002