Darlington pair touch sensor



hi people.. I am Saksham from Lucknow, India. This is my new darlington pair touch sensor made by me, using four NPN transistor BC-547 arranged on a breadboard. When we touch the "touch plate" a very little amount of current flows from our body to the base of the transistor. The two transistor amplify the current and light up the LED.




Darlington pair touch circuit...







LED lights up by touching the "touch plate"










      a schematic of the circuit
      only difference is that i'v used 4 transistors in this format






Comments

  1. Prerana7 May 2012 at 11:08

    good start ..

    ReplyDelete
  2. Saksham Prakash7 May 2012 at 11:27

    thanks

    ReplyDelete
  3. Abhishek8 May 2012 at 00:24

    Good one Amol! I wonder if there are other differences in the circuit you used and the one in the figure.

    ReplyDelete
  4. Saksham Prakash17 May 2012 at 04:50

    only difference is that there is no resistor and i'v used 4 transistors..

    ReplyDelete
  5. Unknown11 May 2015 at 02:06

    Hey u. Can simply use a touch sensor

    ReplyDelete
  6. Unknown11 May 2015 at 02:09

    http://www.amazon.in/TTP223B-Digital-Sensor-capacitive-switch/dp/B00NHLNTR0?tag=googinhydr18418-21&kpid=B00NHLNTR0&tag=googinkenshoo-21&ascsubtag=d781631e-a716-4beb-a57e-d55854f6b410

    ReplyDelete
  7. Unknown11 May 2015 at 02:11

    Hey man have i look over this below

    ReplyDelete
  8. Unknown11 May 2015 at 02:11

    http://m.instructables.com/id/How-to-Build-an-8-Bit-Computer/

    ReplyDelete

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