Today we are building a digital thermometer. Parts we need are:
- Arduino Uno
- 1 x 2ΚΩ resistor
- LM335 temperature sensor
Now let's start with the basics. What is the sensor? You can find the full data-sheet here, but with a few words it's a diode. The voltage on the edge of the diode is proportional to the temperature. For every Kelvin degree increase in temperature the voltage increases by 10 mV. As I said in my previous post the read accuracy of the input pin is ~5mV, so the temperature we read will be half a degree accurate.
Now let's see the circuit we need to build.
