555 simple acupuncture point detector circuit

Published:2011/5/29 19:50:00 Author:TaoXi | Keyword: 555, simple, acupuncture point, detector | From:SeekIC

As the figure 16-19 shows, the acupuncture point detector is composed of the acupuncture point detector circuit and the trigger displaying circuit. One detection probe of the acupuncture point detector is in the hands of the measured person, another detection probe connects to the skin of the measured person, when the probe is closing or touching the acupuncture point, the resistance between the two electrodes is low, so the composited tubes VT1 and VT2are in the saturated conductivity state, the pin-2 of 555 has low electrical level, IC sets, VT3 conducts and sends out the sound and light reminding signals, this means the point detection is right; at the position of non-acupuncture point, the skin resistance is high, VT1 and VT2 cut off, 555 is in the resetting state, there is no light siganl.



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