digital temperature sensors

[URGENT]

i'm trying to design a circuitry which will trigger a response when the
temperature sensors register a particular temperature.

Problem: I'm not exactly sure what should be in the circuit. CAN ANYONE
HELP ME?

u can also send your suggestions to [email protected].

MUCHAS GRACIAS

 

[BobG]

This gadget is called a thermostat. You can buy one at Home Depot. Da
Nada

 

[Uwe Bonnes]

i'm trying to design a circuitry which will trigger a response when the
temperature sensors register a particular temperature.

Problem: I'm not exactly sure what should be in the circuit. CAN ANYONE
HELP ME?

LM75, TMP101, DS18B20 ?

 

[Rich Webb]

i'm trying to design a circuitry which will trigger a response when the
temperature sensors register a particular temperature.

How accurate? How repeatable? How rugged? What temperature? What time
constant? How many? (one benchtop rig or 100K units per month?)

 

[URGENT]

temperature range: 30-50 degrees Celsius
I'm trying effect cooling so i want to start cooling when the temperature
goes above 27 degrees
and stop when it goes below although i doubt it will based on our climate.