The public bus door shutting reminder

Published:2011/7/22 20:46:00 Author:qqtang | Keyword: public bus, door shutting reminder | From:SeekIC

The working principle of the circuitThe public bus door shutting reminder consists of the +12V resistors of R1 and R2, LED VL1-VL4, Hall sensors of 1 and 2, see as figure 7-115. Hall sensor 1 and Hall sensor 2 are installed on the door frames of the bus, and in the corresponding places, there is a magnetic steel chip on either door.



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