555 micro defibrillation emergency device circuit

Published:2011/5/2 22:51:00 Author:May | Keyword: 555, micro, defibrillation, emergency device | From:SeekIC

The defibrillator ordinary used for arrhythmia patient is bulky, heavy and inconvenient to carry. This circuit adopts 555 circuit, it is safe and reliable, and the operation is simple. As shown in diagram 16-13, astable multivibrator consists of 555 and R1, R2, c2, f=1.44/(R1+2R2)C2, its oscillation frequency is about 3kHz. Output of 555 is enlarged by VT1, transformer can set up to 100~200V, it is rectified by D1 and stored energy by big capacitor C3. When using and pressing AN, C4 discharges by the primary stage L3 of T2, and the secondary stage L4 is induced high voltage 1000~7000V and defibrillation for arrhythmia patient.



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