SIMPLE TEMPERATURE CONTROLLER
>> Wednesday, April 14, 2010
DESCRIPTION:
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:
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:
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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