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Simple Temperature Controller (LM135)

2015-01-10 12:08  
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This article describes the Simple Temperature Controller (LM135). The content is very simple, very helpful. Components in this article can help you understand better understanding of this article. For example, in this article, you can go to find and buy these components:LM135.

This temperature controller employs an LM135/235/335 temperature sensor, can be used to keep small environment warm or hot. Here is the schematic diagram:

Simple temperature controller circuit schematic diagram

LM311 is used as comparator, to detect if the voltage at sensor pin (the inverting input) goes higher than the reference pin (the non-inverting pin). If this condition is detected, the comparator will switch off the heater driver (BUV26).? Practically, after the desired temperature is met, the heater will be oscillating on-off,? trying to keep the voltages at non-inverting input and inverting input? equal.


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