How to make DIY-Digital Temperature?

Question

Does anybody know the circuit diagram for measuring temperature in digital and the parts needed?

thanks...

Answer 1

Three parts:

2.2K resistor

2.2K NTC thermistor

Atmel ATtiny44 or equivalent micro controller. ( this micro also has a built in temp sensor so you could use just this micro)

Use a 2.2K NTC thermistor with a standard 2.2K resistor in a voltage divider powered by 5Vdc.   Use a microcontroller with an ADC using 5V Vcc as Vref and obtain a count which represents the output voltage of the divider.

Compute the resistance of the thermistor using Ohms law and plug resistance into formula found in data sheet (or use a look up table)