temperature sensor-LM35

hello...

to create temperature sensor, i used:-
LM35
AT89c51
LED- red,yellow,green..

from the list of the component i already have, can u suggest me some idea how to create the temperature sensor? my reference 2.5v... 5v dc voltage...

To save yourself some time, you may want to look at National's suggested applications here on their datasheet:

https://www.electro-tech-online.com/custompdfs/2010/05/LM35.pdf

darkmaster said:

hello...

to create temperature sensor, i used:-
LM35
AT89c51
LED- red,yellow,green..

from the list of the component i already have, can u suggest me some idea how to create the temperature sensor? my reference 2.5v... 5v dc voltage...

Click to expand...

What are going to do with the measured temp. ? If you want to display the measured temp on display, then you will need more stuffs, but if you want to just do it like thermostat switch, it is much easier. Decide and let us all know.

Hi darkmaster,

the LM35 is already a temperature sensor, so why would you want to create one?

Per datasheet the LM35 puts out 10mV/deg/C.

Starting at 0deg/C the output is zero, at 1 deg/C it is 10mV and so forth being quite linear.

Using three LEDs to indicate three imaginary temperatures is pretty vague.

Which temperatures to you want to indicate using three LEDs?

Use your imagination and describe the problem closer!

If you can't just keep the change.

Boncuk