ROAD_ICING_ALARM

Published:2009/7/21 20:54:00 Author:Jessie | From:SeekIC

Sensing transmitter mounted on auto about 2 feel above rood, with junction of transistor connected to case is connected to low-frequency oscillator having lamp load. R7 is adjusted so lamp is out but on verge of flashing of 2℃. When temperature drops, lamp flashes. Duration of each lash increases down to 0℃ after which lamp remains on.-J. A. Irvine, Reducing Winter Skids with a Transistor Warning Circuit, Electronics, 36:4, p 56-58.



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