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Build a sensor that detects air flow using an incandescent lamp to detect the air flow.
Member rating: No Rating | Words: | Submitted: Wed Mar 31 2004
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Aim: The aim this project is to build a sensor that detects air flow using an incandescent lamp to detect the air flow. An LED will also be included in the circuit and as the air flow increase the brightness of this LED will also increase. A voltmeter will be connected in parallel to the Led to detect the changes in voltage as the airflow changes. Introduction: The circuit will use an incandescent lamp to detect the airflow. The glass around the bulb will have to be cracked, this will expose the filament. The glass will be cracked by wrapping it round in masking tape and cracking, therefore the glass can be removed without damaging the filament. With the filament exposed to the air, a constant current source is used to slightly heat the filament. As it is heated, the resistance increases. As the air flows over the filament it is...
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