Automatic distress alarm kit control circuit

  
Circuit works: When the patient usually upright, packed in kit SQ mercury switch was turned off,
Automatic distress alarm kit control circuit - schematic

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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