This fire sensor circuit exploits the temperature sensing property of an ordinary signal diode IN 34 to detect heat from fire. At the moment it senses heat, a loud alarm simulating that of Fire ...

Results My first conclusion is that the simplest method of all, a diode and a 10 kΩ resistor fed into an ADC, is sufficient for non-precise work across any reasonable temperature range.

Lab 1 - Diode Characterization and Differential Temperature Sensor This lab focused on measuring the saturation current of a 1N4148 diode and designing a temperature sensor using the diode’s ...

Sensing using a micro-device at high temperature is a critical problem as a Si readout circuit does not work at high temperature, even if a sensor itself is heat-resistive. We for the first time ...

In Figure 2, the diode used as a temperature sensor has a voltage excitation. A large ratio of voltage excitation (V DIODE) to the changes of the voltage drop across the diode with temperature, ...

The circuit in Figure 1 requires only an ordinary negative-temperature-coefficient (NTC) thermistor, two common ICs, and a handful of discrete components. The circuit uses a uni ...

For reduced power, the sensor can be put into sleep mode, reducing consumption to 10 µA. In a MSOP-8 package, price is $1.75 each/1,000. TEXAS INSTRUMENTS INC., Dallas, TX. (800) 477-8924.