my project skin response meter

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  Rupam Das

  andenagaveni24

  hai i am thinking to do mini project so for that i selected a simple one "skin response meter" .....this is a simple circuit that can sense whether the body is in relaxed state or not..the main concept involved is that the body offers some resistance depending on the mental condition...the circuit exploits skin's galvanic property to measure the stress level of the body...
  
  
  
  i anybody is aware of this and know much more about this please post in this thread....i want more content about this because i couldnt explore much content about this on internet so i want our CEeans to help me out.....
  
  please do post anything if you know anything about this friends this will be a very great help for me.....

  
  
  See the fact is, based on our mental state, i.e. if we are relaxed or tensed, our Hear rate varies. Hence pulse rate, humidity on the skin surface all changes. The change in skin surface voltage or pulse rate can give a measure of the same. But the voltage is very low. So you basically need a sensor, an amplifier, an A/D and a microcontroller and relay based on what sort of output you are giving. 
  
  Just search for pulse rate sensor or body current sensor, there are many low cost variable available in the market. A simple experiment can be conducted first by just measuring the voltage/current output of the sensor and viewing it in multimeter. based on variation either you code 8051/pic or use thrshold detector.