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Last Updated on: Thursday, April 07, 2016 02:04 PM

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Snow Sensors / Detectors

 

Snow Depth Alarm  -  The design of this system alerts a snowplow driver when the snow depth has exceeded four inches. A visible red LED packaged in a 10mm package is pulsed at a rate of about 50Hz with 10uS pulses.  Twenty four inches away a phototransistor detects the light from the LED.  The LED and the phototransistor are housed in a section of inch PVC pipe, forming a waterproof seal.  . . . [Hobby Circuit designed by Dave Johnson P.E.,  07/18/06]

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