• on Miscellaneous Electronics
  • Published in issue 7/2009 on page 76
About the article

Stress-o-Meter

Stress-o-Meter
One the many consequences of stress is an increase in the heart rate. The resulting variation in blood flow can easily be sensed using light transmission, since the absorption of the transmitted light depends on the blood flow. Here an ordinary plastic clothespin is converted into a suiatble sensor.
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