The article posted here is of Water Temperature Controller Circuit based on PT100. For temperature indication, a LED bar graph designed using 8-LEDs is used. PT100 is a temperature transducer that produces changes in impedance whenever the temperature changes. It has definite resistance at each temperature within its temperature range because it is made from temperature-sensitive elements. The reasons for using platinum type temperature transducers are cheap, high stability, and wide operating temperature range i.e. -1800C to 800C. Check out the article on Resistance Type Thermometer PT100 is a probe…
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