Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I have built one, along time ago. using LM335 as sensors, and a millivolt meter as read out. It reads (scaled as) 100mV/°C. The LM555 is used as negative voltage converter (converts +9V - +12V to negative values)
If somethings you don't understand in my schematic, post it here or better, email me
actually my projects is the one thermometer sensor..
it's like, we're making a display thermometer..
that thermometer should measure the temperature of the desired area,, and everyone can see it just like a digital clock..
somebody told me to first design a temperature sensitive circuit..
you have given me the diagram of that circuit,, what will i do next?
For your case, you can use DS75LV for high accuracy temperature sensor, also you may interface my design to a microcontroller circuit that can ADC and drive your LCD display (or may be, segment displays). Are you familiar in some of the microcontrollers available in our country? and familiar in LCD interfacing?