Automatic distress alarm kit control circuit

  
Circuit works: When the patient usually upright, packed in kit SQ mercury switch was turned off,

the alarm circuit power does not work. Once the patient down, SQ automatically connected to the power supply circuit, GB by RT, charges C, after a few seconds about the charging voltage across C up to about 1.3 V, VD and VT. Successively by the cutoff turned ON, lC by 7 feet to get low-level trigger signal work, the output of the pulse output of 6 feet three frequency conversion signal, the VT2 power amplifier, the drive B issue a pleasant change tone alarm .




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