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Sensors / Detectors: Air Flow Detectors
Last Updated on: Saturday, April 26, 2008 07:43 AM

Sensors / Detectors -- Main Page

 
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Air Flow Detector #1:  This simple circuit uses an incandescent lamp to detect airflow. With the filament exposed to air, a constant current source is used to slightly heat the filament. As it is heated, the resistance increases. As air flows over the filament it cools down, thus lowering its resistance. A comparator is used to detect this difference and light an LED. With a few changes, the circuit can be connected to a meter or ADC to provide an estimation on the amount of airflow. (Electronic Schematic / circuit added 4/02)

Airflow Monitor Protects Components:  09/28/95 EDN-Design Ideas / (Electronic Schematic / circuit added 4/02)  

Sensing Air Flow with the PIC16C781:  Microchip Application Note - Published 30-Dec-02   (added 2/06)

TB044:  Sensing Air Flow with the PIC16C781:  Microchip Application Note - Published 30-Dec-02   (added 2/06)

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