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1N4148 Silicon Diode used as Temperature Sensor
Basic Electronics Project
1N4148 Silicon Diode Used as a Temperature Sensor
Date
December 2022
Conestoga College
Cambridge, Ontario
Role
Lead Developer
A temperature sensor diode is a general silicon diode that changes temperature as the resistance of the diode changes. A 1N4148 diode is a fast-switching diode whose resistance changes as the temperature changes. Usually, we have seen this type of equipment, a thermistor. It is a type of resistor and is easy to use. But we do not see it in normal use. Its resistance will reduce when it is hot. Contrarily, when it is cold its resistance rises. 1N4148 diode is used at both room temperature and at a heated temperature to see the difference in the voltages that pass through the diode. Voltage thresholds are set for both the higher and lower limit of the voltage which in turn acts as points of logic 1 and 0 for the temperature sensor.
