Patients SOS Alarm (1)

Published:2011/6/28 6:00:00 Author:Sue | Keyword: Patients, SOS, Alarm | From:SeekIC

When there is no danger case, the alarm is in the pocket of the patient. S is disconnected. V1,V2 are disconnected. IC and BL do not work. When the patient fell on the ground because of his illness, S is connected. C is charged by RP. When C's voltage reaches a certain value, V1 and V2 are connected. IC begins to work. The signal it outputs will promote BL to make an alarm sound after the signal is amplified by V3.



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